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BEGIN:VEVENT
SUMMARY:Detecting Gravitational Waves from Cosmic Phase Transitions in Spa
 ce
DTSTART;VALUE=DATE-TIME:20250929T033000Z
DTEND;VALUE=DATE-TIME:20250929T035000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1945@indico.itp.ac.cn
DESCRIPTION:Speakers: Qingyuan Liang (Ictp ap)\nThis presentation explores
  the detection and analysis of stochastic gravitational wave backgrounds (
 SGWB) originating from first-order cosmological phase transitions\, with a
  focus on the sound wave contributions. It begins by introducing the relev
 ant detector configurations\, including space-based interferometers like L
 ISA and Taiji\, and the construction of AET channels to extract clean grav
 itational wave signals. Simulated data are generated in both time and freq
 uency domains\, incorporating realistic noise and signal models. A compreh
 ensive statistical analysis framework is developed\, combining likelihood 
 functions\, Fisher matrix forecasts\, and MCMC sampling to extract and con
 strain physical parameters. Finally\, the talk connects the phenomenologic
 al gravitational wave parameters to the underlying extended Standard Model
  (xSM) parameters\, demonstrating how SGWB observations can inform particl
 e physics beyond the Standard Model.\n\nhttps://indico.itp.ac.cn/event/349
 /contributions/1945/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1945/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Numerical simulations on vacuum decay
DTSTART;VALUE=DATE-TIME:20250928T000000Z
DTEND;VALUE=DATE-TIME:20250928T003000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1949@indico.itp.ac.cn
DESCRIPTION:Speakers: Ligong Bian ()\nIn this talk\, I will review our rec
 ent progress on the numerical simulation of vacuum decay at finite tempera
 ture.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1949/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1949/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Freeze-in of Composite Dark Sector
DTSTART;VALUE=DATE-TIME:20250929T000000Z
DTEND;VALUE=DATE-TIME:20250929T003000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1954@indico.itp.ac.cn
DESCRIPTION:Speakers: Lingfeng Li ()\nWe consider the generic picture of D
 M freeze-in when the dark sector is strongly coupled and confined at low e
 nergy scales. Two scenarios\, namely the UV and IR freeze-in production an
 d accompanying unique phenomena.\n\nhttps://indico.itp.ac.cn/event/349/con
 tributions/1954/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1954/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Strong backreaction of gauge quanta produced during inflation and 
 the sourced GWs
DTSTART;VALUE=DATE-TIME:20250929T035000Z
DTEND;VALUE=DATE-TIME:20250929T041000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1994@indico.itp.ac.cn
DESCRIPTION:Speakers: Jian-Feng He (ITP\, CAS)\nIn this report\, I will in
 troduce our recent studies about the axion-gauge system during inflation\,
  mainly focusing on the strong backreaction region. With a linear axion po
 tential\, we found that a steeper slope can enhance the gauge quanta produ
 ction\, while a larger coupling cannot increase it. We then apply this res
 ult to a realistic model with cosine axion potential\, finding the quantum
  fluctuation can limit the max GW spectrum.\n\nhttps://indico.itp.ac.cn/ev
 ent/349/contributions/1994/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1994/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sound waves from primordial black hole formations
DTSTART;VALUE=DATE-TIME:20250929T025000Z
DTEND;VALUE=DATE-TIME:20250929T031000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1955@indico.itp.ac.cn
DESCRIPTION:Speakers: Zhuan Ning (HIAS and ITP-CAS)\nWe present a numerica
 l investigation of primordial black hole (PBH) formation from super-horizo
 n curvature perturbations and the subsequent generation and propagation of
  sound waves\, which can serve as a new source of stochastic gravitational
  wave backgrounds (SGWBs) presented in a companion letter. Using the Misne
 r-Sharp formalism with an excision technique\, our simulations extend to s
 ignificantly later times than previous work and indicate that the near-cri
 tical perturbations produce a distinct compression wave featuring both ove
 rdense and underdense shells\, while significantly supercritical perturbat
 ions yield only an underdense shell. We also show that a softer equation o
 f state suppresses the formation of compression waves. Furthermore\, the c
 omoving thickness of sound shells remains nearly constant during propagati
 on and scales with the Hubble radius at horizon re-entry\, thereby serving
  as a key link between the gravitational-wave peak frequency and PBH mass 
 in the companion letter. These results offer new insights into the dynamic
 s of PBH formation and suggest potential observational signatures of PBHs 
 in the gravitational wave (GW) spectrum from associated sound waves.\n\nht
 tps://indico.itp.ac.cn/event/349/contributions/1955/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1955/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cosmological Signatures of Neutrino Seesaw Mechanism
DTSTART;VALUE=DATE-TIME:20250927T083000Z
DTEND;VALUE=DATE-TIME:20250927T090000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1993@indico.itp.ac.cn
DESCRIPTION:Speakers: Chengcheng Han ()\nThe tiny neutrino masses are most
  naturally explained by the seesaw mechanism through singlet right-handed 
 neutrinos\, which can further explain the matter-antimatter asymmetry in t
 he universe. In this work\, we propose a new approach to study cosmologica
 l signatures of neutrino seesaw through the interaction between inflaton a
 nd right-handed neutrinos. After inflation the inflaton predominantly deca
 ys into right-handed neutrinos and its decay rate is modulated by the fluc
 tuations of Higgs field which act as the source of curvature perturbations
 . We demonstrate that this modulation produces primordial non-Gaussian sig
 natures\, which can be measured by the forthcoming large-scale structure s
 urveys. We find that these surveys have the potential to probe a large por
 tion of the neutrino seesaw parameter space\, opening up a new window for 
 testing the high scale seesaw mechanism.\n\nhttps://indico.itp.ac.cn/event
 /349/contributions/1993/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1993/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Enhancing Phase Transition Calculations with Action Curve Fitting
DTSTART;VALUE=DATE-TIME:20250927T000000Z
DTEND;VALUE=DATE-TIME:20250927T003000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1928@indico.itp.ac.cn
DESCRIPTION:Speakers: Yang Zhang (Henan Normal University)\nThe computatio
 n of bounce action in a phase transition involves solving partial differen
 tial equations\, inherently introducing non-negligible uncertainty. Derivi
 ng characteristic temperatures and properties of this transition necessita
 tes both differentiation and integration of the action\, thereby exacerbat
 ing the uncertainty. We fit the action curve as a function of temperature 
 to mitigate the uncertainties inherent in the calculation of the nucleatio
 n temperature\, percolation temperature\, and inverse transition duration.
  We find that\, after extracting a factor\, the sixth-order polynomial yie
 lds an excellent fit for the action in the toy model. In a realistic model
 \, the singlet extension of the Standard Model\, this method performs sati
 sfactorily across most of the parameter space after trimming the fitting d
 ata. This approach not only enhances the accuracy of phase transition calc
 ulations but also systematically reduces computation time and facilitates 
 error estimation\, particularly in models involving multiple scalar fields
 .\n\nhttps://indico.itp.ac.cn/event/349/contributions/1928/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1928/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leptogenesis triggered by an electroweak phase transition
DTSTART;VALUE=DATE-TIME:20250928T090000Z
DTEND;VALUE=DATE-TIME:20250928T093000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1923@indico.itp.ac.cn
DESCRIPTION:Speakers: Ke-Pan Xie (Beihang University)\nIn this talk\, I wi
 ll review the new physics mechanisms based on first-order phase transition
 s in recent years.\n\nhttps://indico.itp.ac.cn/event/349/contributions/192
 3/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1923/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Emulating gravitational wave spectra from sound waves during the c
 osmological FOPT
DTSTART;VALUE=DATE-TIME:20250927T090000Z
DTEND;VALUE=DATE-TIME:20250927T093000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1912@indico.itp.ac.cn
DESCRIPTION:Speakers: Chi Tian ()\nWe present DeepSSM\, an open-source cod
 e powered by neural networks (NNs)\nto emulate gravitational wave (GW) spe
 ctra produced by sound waves during cosmological\nfirst-order phase transi
 tions in the radiation-dominated era. The training data is obtained\nfrom 
 an enhanced version of the Sound Shell Model (SSM)\, which accounts for th
 e effects\nof cosmic expansion and yields more accurate spectra in the inf
 rared regime. The emulator\nenables instantaneous predictions of GW spectr
 a given the phase transition parameters\, while\nachieving agreement with 
 the enhanced SSM model within 10% accuracy in the worst case\nscenarios. T
 he emulator is highly computationally efficient and fully differentiable\,
  making\nit particularly suitable for direct Bayesian inference on phase t
 ransition parameters without\nrelying on empirical templates\, such as bro
 ken power-law models. We demonstrate this capability by successfully recon
 structing phase transition parameters and their degeneracies from\nmock LI
 SA observations using a Hamiltonian Monte Carlo sampler.\n\nhttps://indico
 .itp.ac.cn/event/349/contributions/1912/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1912/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Long lived Particle searches of Higgs sector
DTSTART;VALUE=DATE-TIME:20250927T030000Z
DTEND;VALUE=DATE-TIME:20250927T033000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1921@indico.itp.ac.cn
DESCRIPTION:Speakers: Wei Su (SYSU)\nTBD\n\nhttps://indico.itp.ac.cn/event
 /349/contributions/1921/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1921/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cosmic Phase Transitions: The Gravitational Wave - Collider Interp
 lay
DTSTART;VALUE=DATE-TIME:20250926T000000Z
DTEND;VALUE=DATE-TIME:20250926T003000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1953@indico.itp.ac.cn
DESCRIPTION:Speakers: Michael Ramsey-Musolf (TDLI)\nhttps://indico.itp.ac.
 cn/event/349/contributions/1953/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1953/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Search for Higgs Boson Pair Production at the ATLAS Experiment
DTSTART;VALUE=DATE-TIME:20250927T013000Z
DTEND;VALUE=DATE-TIME:20250927T020000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1952@indico.itp.ac.cn
DESCRIPTION:Speakers: Kun Liu (Tsung-Dao Lee Institute\, Shanghai Jiao Ton
 g University)\nThe study of Higgs boson pair production at the LHC and pot
 ential future high-energy colliders offers a unique opportunity to probe t
 he dynamics of electroweak symmetry breaking. In the Standard Model\, non-
 resonant di-Higgs production enables direct access to the Higgs trilinear 
 self-coupling\, serving as a crucial test of the Higgs mechanism. Beyond t
 he Standard Model\, both resonant and non-resonant di-Higgs production are
  sensitive to extensions of the Higgs sector\, which could imply a first-o
 rder electroweak phase transition in the early universe. Experimentally\, 
 di-Higgs production presents a rich variety of decay channels to investiga
 te\, along with associated challenges. In this talk\, I will present recen
 t experimental results on di-Higgs production from the ATLAS experiment.\n
 \nhttps://indico.itp.ac.cn/event/349/contributions/1952/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1952/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gravitational Waves from Sound Waves
DTSTART;VALUE=DATE-TIME:20250929T010000Z
DTEND;VALUE=DATE-TIME:20250929T013000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1927@indico.itp.ac.cn
DESCRIPTION:Speakers: Xiao Wang (Monash University)\nFirst-order phase tra
 nsitions in the early universe can produce a stochastic background of grav
 itational waves (GWs)\, where sound waves in the plasma are expected to be
  the dominant source in the absence of extreme supercooling. A precise pre
 diction of the GW spectrum therefore requires a careful treatment of the p
 lasma dynamics. In this work we investigate three key effects: inverse hyd
 rodynamics\, the role of cosmic expansion\, and the impact of time-varying
  bubble wall velocities. We perform a systematic analysis of these effects
  on the GW signal and demonstrate how they alter both the amplitude and sp
 ectral shape. Our results provide a step toward more accurate GW templates
  for cosmological phase transitions\, which will be crucial for interpreti
 ng data from upcoming GW observatories.\n\nhttps://indico.itp.ac.cn/event/
 349/contributions/1927/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1927/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Scalar-induced gravitational waves with non-Gaussianity up to all 
 orders
DTSTART;VALUE=DATE-TIME:20250929T023000Z
DTEND;VALUE=DATE-TIME:20250929T025000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1951@indico.itp.ac.cn
DESCRIPTION:Speakers: Xiang-Xi Zeng (ITP\, CAS)\nScalar-induced gravitatio
 nal waves (SIGWs) are ubiquitous in many early-Universe processes accompan
 ied by non-Gaussianity\; hence\, precise calculations of SIGWs involve a f
 ull understanding\nof non-Gaussianity. Therefore\, we propose to use the l
 attice simulations to directly calculate\nthe energy density spectra of SI
 GWs with non-Gaussianity up to all orders. Our proposal has been\nfirst ve
 rified to match the existing semi-analytical results with non-Gaussianity\
 , and then applied to\nmore general cases\, including high-order primordia
 l non-Gaussianities\, the logarithmic dependence\nin curvature perturbatio
 ns\, the curvaton model\, and the ultra slow-roll model. We find that even
  a\nmodest non-Gaussianity can significantly alter ultraviolet behaviors i
 n SIGW spectra\, necessitating\nspecial cautions in future detections as w
 ell as mutual constraints on/from primordial black holes.\n\nhttps://indic
 o.itp.ac.cn/event/349/contributions/1951/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1951/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The roles of bound state in dark sectors
DTSTART;VALUE=DATE-TIME:20250929T003000Z
DTEND;VALUE=DATE-TIME:20250929T010000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1950@indico.itp.ac.cn
DESCRIPTION:Speakers: Xiaoyong Chu (ICTP-AP\, UCAS)\nThere is a growing in
 teresting in studying dark sectors\, which are only feebly coupled to the 
 Standard Model sector\, but could be strongly self-coupled. The potential 
 existence of bound state in dark sectors\, motivated by hints of strongly 
 self-interacting dark matter\, results in novel phenomenology. This talk d
 iscusses its applications in dark matter physics and beyond\, as well as t
 he methods developed to qualitatively study such dark bound states.\n\nhtt
 ps://indico.itp.ac.cn/event/349/contributions/1950/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1950/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Physics Opportunities at the Muon Collider
DTSTART;VALUE=DATE-TIME:20250928T033000Z
DTEND;VALUE=DATE-TIME:20250928T040000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1947@indico.itp.ac.cn
DESCRIPTION:Speakers: Yandong Liu (Beijing Normal University)\nThe muon co
 llider\, a proposed facility that combines high collision energies with a 
 clean experimental environment\, offers compelling opportunities for advan
 cing particle physics. This talk will explore its dual strengths: enabling
  precision measurements within the Standard Model and extending the search
  for new physics. We will specifically highlight its exceptional potential
  for probing the quartic Higgs–gauge boson coupling\, taking advantage o
 f the dominance of vector boson fusion processes at high energies\, which 
 effectively transform the collider into a ‘gauge boson collider’. Furt
 hermore\, we will discuss the unique capability of the muon collider to in
 vestigate Heavy Neutral Leptons (HNLs)\, emphasizing how its well-defined 
 initial state can be exploited to distinguish between Dirac and Majorana s
 cenarios.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1947/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1947/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Testing Phase Transition and cosmological history at colliders
DTSTART;VALUE=DATE-TIME:20250928T093000Z
DTEND;VALUE=DATE-TIME:20250928T100000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1937@indico.itp.ac.cn
DESCRIPTION:Speakers: Wenxing Zhang (Hebei University)\nA strong first-ord
 er electroweak phase transition (SFOEWPT) is a critical prerequisite for r
 ealizing electroweak baryogenesis in the early universe. However\, lattice
  simulations indicate that the contribution from the Standard Model (SM) H
 iggs alone is insufficient to produce a strong first-order phase transitio
 n. New physics\, particularly beyond-the-SM (BSM) scenarios with scalar ma
 sses around 700 GeV\, is required to achieve SFOEWPT. This has motivated p
 hysicists to search for such particles at current and future colliders. In
  this talk\, I will present two representative models that shed light on t
 he status of electroweak phase transition searches at colliders. Additiona
 lly\, I will explore how the evolution of dark matter in the early univers
 e influences electroweak symmetry breaking.\n\nhttps://indico.itp.ac.cn/ev
 ent/349/contributions/1937/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1937/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Entanglement features from intermediate heavy particle in scatteri
 ng
DTSTART;VALUE=DATE-TIME:20250929T013000Z
DTEND;VALUE=DATE-TIME:20250929T020000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1907@indico.itp.ac.cn
DESCRIPTION:Speakers: Chon Man Sou (Tsinghua University)\nThe amount of in
 formation propagated by an intermediate heavy particle exhibits characteri
 stic features in inelastic scatterings with n$\\geq$3 final particles. As 
 the total energy increases\, the entanglement entropy\, between its decay 
 products and other final particles\, exhibits a universal sharp dip\, supp
 ressed by its small decay rate. This indicates an entanglement suppression
  from a low-energy effective theory to a channel dominated by an on-shell 
 heavy particle. As demonstrations of these entanglement features\, we stud
 y concrete models of 2$\\to$3 and 2$\\to$4 scatterings\, which shed light 
 on the entanglement structure beyond the area law derived for 2$\\to$2 sca
 ttering. In practice\, these features may be probed by suitably marginaliz
 ing the phase-space distribution of final particles.\nReferences: 2507.035
 55\n\nhttps://indico.itp.ac.cn/event/349/contributions/1907/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1907/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Searching for axions with gravitational waves
DTSTART;VALUE=DATE-TIME:20250928T060000Z
DTEND;VALUE=DATE-TIME:20250928T063000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1939@indico.itp.ac.cn
DESCRIPTION:Speakers: Huan Yang (Tsinghua University)\nIn this talk\, I wi
 ll review recent progress of using LIGO observations to constrain paramete
 r space of axion-like particles. I will also discuss the frontiers of unde
 rstanding the co-evolution of axion clouds and binary systems\, including 
 both stellar-mass black hole binaries and extreme mass-ratio inspirals.\n\
 nhttps://indico.itp.ac.cn/event/349/contributions/1939/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1939/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Probing Lepton-Number-Violating New Physics at Colliders
DTSTART;VALUE=DATE-TIME:20250928T030000Z
DTEND;VALUE=DATE-TIME:20250928T033000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1946@indico.itp.ac.cn
DESCRIPTION:Speakers: Gang Li (SYSU)\nWhile lepton number is conserved in 
 the Standard Model\, its violation is a requisite for generating neutrino 
 Majorana masses. Consequently\, the search for lepton number violation is 
 a critical pathway for elucidating the origin of neutrino mass and explori
 ng beyond-the-Standard-Model physics. If lepton-number-violating (LNV) new
  physics occurs at the TeV scale\, it can be assessed at colliders through
  direct searches for new particles and precision measurements of their cou
 plings. In this talk\, I will review recent developments\, with a focus on
  the ultraviolet completions of the LNV effective operators and flavor eff
 ects inherent in LNV new physics.\n\nhttps://indico.itp.ac.cn/event/349/co
 ntributions/1946/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1946/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Wess-Zumino-Witten Interactions 
of Axions with Three-Flavor
DTSTART;VALUE=DATE-TIME:20250928T063000Z
DTEND;VALUE=DATE-TIME:20250928T070000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1943@indico.itp.ac.cn
DESCRIPTION:Speakers: Jia Liu (Peking University)\nWe present a complete L
 agrangian describing axion interactions with pseudoscalar and (axial-)vect
 or mesons within the three light-flavor quark framework. This formulation 
 incorporates both the standard chiral Lagrangian and the full Wess-Zumino-
 Witten (WZW) term. By including instanton effects associated with the anom
 alous U(1)_A symmetry\, we demonstrate that physical observables remain in
 variant under arbitrary chiral phase rotations of the quark fields. This c
 omprehensive Lagrangian provides a robust and consistent framework for exp
 loring axion phenomenology through its interactions with mesons and gauge 
 bosons. As a demonstration\, we compute the decay widths of GeV-scale axio
 ns into various mesonic final states for several benchmark axion models.\n
 \nhttps://indico.itp.ac.cn/event/349/contributions/1943/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1943/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Testing GUT phase transition via inflated gravitational waves
DTSTART;VALUE=DATE-TIME:20250926T033000Z
DTEND;VALUE=DATE-TIME:20250926T040000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1917@indico.itp.ac.cn
DESCRIPTION:Speakers: Ye-Ling Zhou (HIAS-UCAS)\nGUT phase transition is ge
 nerally considered as an unobservable process due to its ultra-high energy
  scale\, and the monopole problem associated with GUT phase transition is 
 one motivation of inflation. We propose that if a first-order GUT phase tr
 ansition happens during inflation\, the induced gravitational waves (GWs) 
 are redshifted and deformed\, and might be observed today in GW observator
 ies. We show that the e-folding number at 15 or 25 can shift the GWs to 10
  Hz or mHz hands\, respectively\, which might be tested in the future grou
 nd-based or space-based interferometers. Presentation based on https://arx
 iv.org/abs/2501.01491\n\nhttps://indico.itp.ac.cn/event/349/contributions/
 1917/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1917/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Darkogenesis via Supercooled Phase Transition
DTSTART;VALUE=DATE-TIME:20250927T023000Z
DTEND;VALUE=DATE-TIME:20250927T030000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1915@indico.itp.ac.cn
DESCRIPTION:Speakers: Yuichiro Nakai ()\nWe discuss the intriguing possibi
 lity that the recently reported nano-Hz gravitational wave signal by Pulsa
 r Timing Array (PTA) experiments is sourced by a strong first-order phase 
 transition in a dark sector. The phase transition has to be strongly super
 cooled to explain the signal amplitude. However\, such strong supercooling
  exponentially dilutes away any pre-existing baryon asymmetry and dark mat
 ter\, calling for a new paradigm of their productions. We then develop a m
 echanism of cold darkogenesis that generates a dark asymmetry during the p
 hase transition from the textured dark SU(2) Higgs field. This dark asymme
 try is transferred to the visible sector via neutron portal interactions\,
  resulting in the observed baryon asymmetry. Furthermore\, the mechanism n
 aturally leads to the correct abundance of asymmetric dark matter. Collide
 r searches for mono-jets and dark matter direct detection experiments can 
 dictate the viability of the model. We also discuss another scenario of da
 rkogenesis where the number asymmetry is generated from the decay of a mot
 her particle produced via parametric resonance during the phase transition
  induced due to its coupling to the order parameter scalar. It is shown th
 at the correct baryon asymmetry and dark matter abundance can be realized 
 for a dark phase transition at O(1) GeV. The scenario will be tested furth
 er in neutron-antineutron oscillation experiments.\n\nhttps://indico.itp.a
 c.cn/event/349/contributions/1915/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1915/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Probing heavy quarkonium hadronization by energy correlators
DTSTART;VALUE=DATE-TIME:20250928T070000Z
DTEND;VALUE=DATE-TIME:20250928T073000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1942@indico.itp.ac.cn
DESCRIPTION:Speakers: Xiaohui Liu (Beijing Normal University)\nThis talk d
 iscusses studies of non-perturbative (NP) effects using Energy Correlators
  at colliders. I will explore the adaptation of energy correlators to heav
 y quarkonium studies\, highlighting their potential for elucidating hadron
 ization processes.\n\nhttps://indico.itp.ac.cn/event/349/contributions/194
 2/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1942/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dark Radiation Isocurvature from Cosmological Phase Transitions
DTSTART;VALUE=DATE-TIME:20250928T083000Z
DTEND;VALUE=DATE-TIME:20250928T090000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1940@indico.itp.ac.cn
DESCRIPTION:Speakers: Peizhi Du (University of Science and Technology of C
 hina)\nCosmological first-order phase transitions are typically associated
  with physics beyond the Standard Model\, and thus of great theoretical an
 d observational interest. In this talk\, I will show that a broad class of
  non-thermal first-order phase transitions could generate distinct large-s
 cale isocurvature in dark radiation that can be observable in the CMB. We 
 derive constraints on $\\Delta N_{\\rm eff}$ from phase transitions based 
 on CMB+BAO data\, which can be much stronger than those from adiabatic ini
 tial conditions. I will also demonstrate that since perturbations of dark 
 radiation have a non-Gaussian origin\, searches for non-Gaussianity in the
  CMB could also place a stringent bound on $\\Delta N_{\\rm eff}$.\n\nhttp
 s://indico.itp.ac.cn/event/349/contributions/1940/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1940/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hints of an electroweak phase transition and electroweak baryogene
 sis?
DTSTART;VALUE=DATE-TIME:20250928T080000Z
DTEND;VALUE=DATE-TIME:20250928T083000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1941@indico.itp.ac.cn
DESCRIPTION:Speakers: Peter Athron (Nanjing Normal University)\nWe know fr
 om the discovery of the Higgs boson that electroweak symmetry is broken th
 rough the Higgs mechanism\, but we expect this should be restored at high 
 temperatures in the early universe.  Thus we believe the matter in the uni
 verse underwent a dramatic change of state as the universe cooled down.  E
 lectroweak phase transitions have many important consequences\, for exampl
 e if strongly first order they may provide an explanation of the baryon as
 ymmetry of the Universe and could produce observable gravitational waves. 
 I will talk about some interesting recent developments related to these po
 ssibilities. This includes looking at whether the signal from pulsar timin
 g arrays could originate from a supercooled electroweak phase transition a
 nd if there may already be a hint of successful electroweak baryogensis co
 ming from flavour anomalies.\n\nhttps://indico.itp.ac.cn/event/349/contrib
 utions/1941/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1941/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cosmological Stasis and Its Observational Signatures
DTSTART;VALUE=DATE-TIME:20250926T093000Z
DTEND;VALUE=DATE-TIME:20250926T100000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1932@indico.itp.ac.cn
DESCRIPTION:Speakers: Fei Huang (Weizmann Institute of Science)\nCosmologi
 cal stasis is a phenomenon in which multiple energy components with differ
 ent equation-of-state parameters maintain constant abundances for an exten
 ded period despite the expansion of the universe. In this talk\, I review 
 the how stasis arises and discuss the possible implications of this phenom
 enon in observations. These include characteristic imprints in the stochas
 tic gravitational-wave background and the enhancement in the growth of mat
 ter density perturbations on small scales.\n\nhttps://indico.itp.ac.cn/eve
 nt/349/contributions/1932/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1932/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A Dynamical Quasigluon Description of the Confinement Phase Transi
 tion
DTSTART;VALUE=DATE-TIME:20250926T080000Z
DTEND;VALUE=DATE-TIME:20250926T083000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1925@indico.itp.ac.cn
DESCRIPTION:Speakers: zhaofeng kang (华中科技大学)\nhttps://indico.i
 tp.ac.cn/event/349/contributions/1925/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1925/
END:VEVENT
BEGIN:VEVENT
SUMMARY:New sources of gravitational waves from the early universe
DTSTART;VALUE=DATE-TIME:20250926T083000Z
DTEND;VALUE=DATE-TIME:20250926T090000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1934@indico.itp.ac.cn
DESCRIPTION:Speakers: Fa Peng Huang (Sun Yat-sen University)\nWe explore n
 ew sources of gravitational waves from the early universe in well motivate
 d new physics models.\n\nhttps://indico.itp.ac.cn/event/349/contributions/
 1934/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1934/
END:VEVENT
BEGIN:VEVENT
SUMMARY:On-shell Approaches for Gravitational Wave Physics
DTSTART;VALUE=DATE-TIME:20250927T070000Z
DTEND;VALUE=DATE-TIME:20250927T073000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1930@indico.itp.ac.cn
DESCRIPTION:Speakers: Fei Teng (Fudan University)\nThe detection of gravit
 ational waves has created a pressing need for high-precision theoretical m
 odels for binary systems. In this talk\, I will review recent progress in 
 the analytic computation of physical observables for binary black hole and
  neutron star systems using modern on-shell methods. This research program
  represents a concerted effort between the fields of quantum field theory 
 and classical general relativity to push the precision frontier of gravita
 tional waveform prediction. We will see how on-shell approaches\, which fo
 cus directly on gauge-invariant observables\, offer significant simplifica
 tions over traditional formalisms. I will conclude the talk with an outloo
 k on future developments in this rapidly evolving field\, including the gr
 owing synergy with QCD effective theories\, energy correlators\, and vario
 us boostrap program.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1
 930/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1930/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gravitational-Wave Experiments and Collider Synergies: Unveiling F
 irst-Order Phase Transitions
DTSTART;VALUE=DATE-TIME:20250928T023000Z
DTEND;VALUE=DATE-TIME:20250928T030000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1918@indico.itp.ac.cn
DESCRIPTION:Speakers: Germano Nardini (University of Stavanger)\nThe detec
 tion of the stochastic gravitational-wave background (SGWB) offers a power
 ful window into both astrophysical and cosmological phenomena. In this tal
 k\, we provide a brief overview of the current status of SGWB measurements
  and their implications for cosmological first-order phase transitions. We
  explore search strategies that future space-based interferometers -- usin
 g LISA as a benchmark -- may employ\, and present forecasts for the achiev
 able reconstruction accuracy. The forecasts highlight the significant pote
 ntial of gravitational-wave observatories to deepen our understanding of f
 irst-order phase transitions in the early universe\, with profound consequ
 ences for particle physics. Indeed\, by detecting or constraining the SGWB
  from such transitions\, these experiments can prove the existence of BSM 
 physics and/or tightly restrict the viable parameter space of particle phy
 sics models\, in compelling synergy with present and future collider exper
 iments.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1918/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1918/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gauge-Invariant Analysis of Phase Transitions in Dark U(1) Sectors
DTSTART;VALUE=DATE-TIME:20250927T080000Z
DTEND;VALUE=DATE-TIME:20250927T083000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1904@indico.itp.ac.cn
DESCRIPTION:Speakers: Wan-Zhe Feng (Tianjin University)\nU(1) dark and dar
 ker sectors accommodating viable dark matter candidate(s) will be discusse
 d. When the additional  U(1) symmetry undergoes spontaneous breaking\, the
  dark sector often exhibits a characteristic phase transition pattern capa
 ble of producing detectable gravitational wave signals. A gauge-invariant 
 formulation of the scalar potential associated with this phase transition 
 will be discussed in detail.\n\nhttps://indico.itp.ac.cn/event/349/contrib
 utions/1904/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1904/
END:VEVENT
BEGIN:VEVENT
SUMMARY:PBH from EWPT and its GW signal
DTSTART;VALUE=DATE-TIME:20250927T033000Z
DTEND;VALUE=DATE-TIME:20250927T040000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1920@indico.itp.ac.cn
DESCRIPTION:Speakers: Yongcheng Wu (Nanjing Normal University)\nThe PBH ca
 n be formed during a delayed EWPT. Using xSM as a benchmark\, we identify 
 the features of the parameter space that tend to generate large fraction o
 f PBH\, which can be explored by collider searches and GW experiments aimi
 ng at the GW signal from EWPT. On the other hand\, the PBH can form binari
 es either with another PBH or with astrophysical BH. GW will also be emitt
 ed from the evolution of such binaries. We performed the analysis based on
  such GW signals which can also cover the interesting parameter space of B
 SM models.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1920/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1920/
END:VEVENT
BEGIN:VEVENT
SUMMARY:First-order phase transitions in the early Universe: gravitational
  waves\, black holes\, and feebly-interacting particles
DTSTART;VALUE=DATE-TIME:20250927T003000Z
DTEND;VALUE=DATE-TIME:20250927T010000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1936@indico.itp.ac.cn
DESCRIPTION:Speakers: Ryusuke Jinno (Kobe University)\nThe possibility of 
 first-order phase transition in the early Universe is drawing attention in
  view of gravitational wave observations planned for the 2030's. In this t
 alk I will first report updates on Higgsless simulations for gravitational
  wave production\, and then report (negative) results regarding primordial
  black hole formation from strong phase transitions. Then I will discuss p
 ossible characteristic imprints on the gravitational waves when feebly int
 eracting particles are produced during first-order phase transitions.\n\nh
 ttps://indico.itp.ac.cn/event/349/contributions/1936/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1936/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bubble wall velocity from Kadanoff-Baym equations: fluid dynamics 
 and microscopic interactions
DTSTART;VALUE=DATE-TIME:20250927T093000Z
DTEND;VALUE=DATE-TIME:20250927T100000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1906@indico.itp.ac.cn
DESCRIPTION:Speakers: Jiang Zhu (Shanghai jiao tong univercity)\nWe establ
 ish a first principles\, systematic framework for determining the bubble w
 all velocity during a first order cosmological phase transition. This fram
 ework\, based on non-local Kadanoff-Baym equations\, incorporates both mac
 roscopic fluid dynamics and microscopic interactions between the bubble wa
 ll and particles in the plasma. Previous studies have generally focused on
  one of these two sources of friction pressure that govern the wall veloci
 ty. As a precursor\, we utilize background field quantum field theory to o
 btain the relevant local Boltzmann equations\, from which we derive the fo
 rces associated with variation of particle masses across the bubble wall a
 nd the microscopic wall-particle interactions. We subsequently show how th
 ese equations emerge from the Kadanoff-Baym framework under various approx
 imations. We apply this framework in the ballistic regime to compute the n
 ew friction force arising from the $2\\rightarrow 2$ scattering processes 
 in scalar field theory. We obtain a linear relationship between this force
  and the Lorentz factor $\\gamma_w$ that would preclude runaway bubbles wi
 th such effects.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1906/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1906/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Operator Basis Construction in Effective Field Theories and Its Ap
 plications
DTSTART;VALUE=DATE-TIME:20250927T063000Z
DTEND;VALUE=DATE-TIME:20250927T070000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1926@indico.itp.ac.cn
DESCRIPTION:Speakers: Haolin Li (Sun Yat-Sen University)\nWe present a gen
 eral algorithm—the Young Tensor Method—for systematically constructing
  complete and independent operator bases in effective field theories. This
  method is applied to a variety of theories\, including the Standard Model
  Effective Field Theory (SMEFT) and low-energy effective field theories. I
 n the process\, we introduce the concept of the J-basis\, a generalized pa
 rtial wave basis that facilitates the study of partial wave unitarity boun
 ds and enables the classification of all possible tree-level ultraviolet (
 UV) completions of effective operators. Furthermore\, by constructing the 
 4-fermion operator basis in Georgi–Glashow-type models\, we investigate 
 dynamical chiral symmetry breaking using the functional renormalization gr
 oup (FRG) approach.\n\nhttps://indico.itp.ac.cn/event/349/contributions/19
 26/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1926/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Effective field theory for general baryon-number-violating nucleon
  decays
DTSTART;VALUE=DATE-TIME:20250927T060000Z
DTEND;VALUE=DATE-TIME:20250927T063000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1905@indico.itp.ac.cn
DESCRIPTION:Speakers: Xiao-Dong Ma ()\nBaryon number violation (BNV) is a 
 requisite to explain the overwhelming dominance of matter over antimatter 
 in our Universe. Yet it has never been observed after decades of heroic se
 arches for BNV nucleon decays. In this circumstance\, it is important that
  all possible decays\, exotic as well as conventional\, should be attempte
 d. In this talk\, I will present our recent work about new BNV interaction
 s among the nucleons\, leptons\, and mesons\, with or without new light pa
 rticles\, in the framework of effective field theory. We construct the lea
 ding-order chiral Lagrangian for these general |Delta B|=1 interactions. I
 n particular\, we develop the first consistent chiral framework for nucleo
 n decays involving vector mesons.\n\nhttps://indico.itp.ac.cn/event/349/co
 ntributions/1905/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1905/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Probing Dark Matter with Gravitational-wave Laser Interferometers 
 in Space
DTSTART;VALUE=DATE-TIME:20250926T030000Z
DTEND;VALUE=DATE-TIME:20250926T033000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1914@indico.itp.ac.cn
DESCRIPTION:Speakers: Yong Tang (UCAS)\ninteresting abstract ...\n\nhttps:
 //indico.itp.ac.cn/event/349/contributions/1914/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1914/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Glueball Dark Matter
DTSTART;VALUE=DATE-TIME:20250926T023000Z
DTEND;VALUE=DATE-TIME:20250926T030000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1935@indico.itp.ac.cn
DESCRIPTION:Speakers: ZHIWEI 志伟 WANG 王 (电子科技大学)\nWe expl
 ore a generic class of composite dark matter candidates arising from confi
 ning dark sectors\, where phase transitions—especially deconfinement-con
 finement and chiral symmetry breaking—can generate stochastic gravitatio
 nal waves. Using a combination of lattice results and effective field theo
 ry approaches such as the Polyakov Loop and PNJL models\, we analyze the d
 ynamics of these phase transitions and demonstrate that the resulting grav
 itational wave signals are highly sensitive to the fermionic content and r
 epresentation in the dark sector. These signals are significantly enhanced
  near conformal symmetry and may be detectable by upcoming experiments suc
 h as DECIGO and the Big Bang Observer.\n    As a concrete realization\, we
  focus on glueball dark matter arising from a pure Yang-Mills sector\, whe
 re glueballs develop axion-like couplings to photons through radiative eff
 ects induced by heavy fermion portals. These glueball ALPs (GALPs) feature
  a coupling-mass relation determined by two fundamental scales: the dark f
 ermion mass and the confinement scale. Without requiring fine-tuning or la
 rge mass assumptions\, GALPs naturally populate previously unexplored ALP 
 parameter space with suppressed electromagnetic interactions. Importantly\
 , our framework yields a robust prediction for the GALP relic abundance—
 an order of magnitude below previous estimates—providing a new benchmark
  for both cosmological modeling and future detection strategies.\n\nhttps:
 //indico.itp.ac.cn/event/349/contributions/1935/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1935/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sub-GeV Sterile Neutrino as a Probe of Neutrino Mass Generation in
  the Minimal Left-Right Symmetric Model
DTSTART;VALUE=DATE-TIME:20250926T070000Z
DTEND;VALUE=DATE-TIME:20250926T073000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1911@indico.itp.ac.cn
DESCRIPTION:Speakers: Sida Lu (Sun Yat-sen University)\nThe minimal left-r
 ight symmetric model (mLRSM) provides an elegant and testable \nframework 
 for addressing the origin of neutrino masses. We examine the constraints o
 n the sub-GeV sterile neutrino in the type-II seesaw scenario of the mLRSM
  without left-right mixing\, taking limits from collider searches\, meson 
 decays\, supernovae\, neutrinoless double beta ($0\\nu\\beta\\beta$) decay
  and cosmology. Specifically\, we derive the $0\\nu\\beta\\beta$ decay con
 straints using the advanced effective field theory approach and up-to-date
  nuclear matrix element calculations. Besides\, we update the SN1987A cool
 ing bound with the state-of-the-art simulations\, provide new constraints 
 from the energy deposition in the supernova ejecta\, and incorporate the s
 tringent sterile neutrino lifetime upper limit from the big bang nucleosyn
 thesis. Our results identify the parameter region compatible with all curr
 ent experimental and observational constraints\, where the sterile neutrin
 o mass lies between 700 MeV and 1 GeV and the right-handed $W$ boson mass 
 is slightly below 20 TeV. This region is exclusively probed by the future 
 tonne-scale $0\\nu\\beta\\beta$ decay experiments\,  providing a unique wi
 ndow to test the mLRSM and the possible origin of neutrino masses.\n\nhttp
 s://indico.itp.ac.cn/event/349/contributions/1911/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1911/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Neutrino reheating predictions with non-thermal leptogenesis
DTSTART;VALUE=DATE-TIME:20250926T063000Z
DTEND;VALUE=DATE-TIME:20250926T070000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1909@indico.itp.ac.cn
DESCRIPTION:Speakers: Xinyi Zhang (Hebei University)\nConnecting inflation
  with neutrino physics through non-thermal leptogenesis via direct inflato
 n-right-handed neutrino (RHN) coupling naturally incorporates neutrino reh
 eating\, leaving no ambiguity regarding the early history of the Universe.
  We demonstrate that non-thermal leptogenesis from inflaton decay expands 
 the viable parameter space compared to thermal leptogenesis and provides a
  natural link to inflation. By closely examining the dynamics of neutrino 
 reheating\, we establish a direct connection between baryon asymmetry and 
 the spectral index for the first time. This approach places these two impo
 rtant observables on the same plane and yields specific predictions that h
 elp break the degeneracy among inflationary models. The well-motivated and
  economical framework offers a simple\, natural\, and testable description
  of the early Universe.\n\nhttps://indico.itp.ac.cn/event/349/contribution
 s/1909/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1909/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Probing New Physics through the Cosmological Collider
DTSTART;VALUE=DATE-TIME:20250926T013000Z
DTEND;VALUE=DATE-TIME:20250926T020000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1929@indico.itp.ac.cn
DESCRIPTION:Speakers: Shuntaro Aoki (RIKEN)\nThe correlation functions of 
 primordial cosmological perturbations encode valuable information about th
 e early universe. In particular\, higher-order correlations\, known as non
 -Gaussianities\, can reveal additional insights\, including the mass and s
 pin of heavy particles\, through characteristic oscillatory signatures. Re
 markably\, such particles can have masses as large as the Hubble scale dur
 ing inflation\, far beyond the reach of terrestrial experiments. This appr
 oach to uncovering new particles through primordial non-Gaussianity is kno
 wn as the cosmological collider program\, and it has emerged as a promisin
 g avenue for probing physics beyond the Standard Model. In this talk\, I w
 ill briefly outline the cosmological collider framework\, comment on some 
 recent developments\, and discuss my own contributions to this growing fie
 ld.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1929/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1929/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bell Inequality Violation of Light Quarks in Dihadron Pair Product
 ion at Lepton Colliders
DTSTART;VALUE=DATE-TIME:20250928T013000Z
DTEND;VALUE=DATE-TIME:20250928T020000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1919@indico.itp.ac.cn
DESCRIPTION:Speakers: Bin Yan (IHEP)\nSpin correlations between particles 
 produced at colliders provide valuable insights for quantum information st
 udies. While traditional studies of quantum information at colliders are t
 ypically limited to massive particles with perturbative decay\, we propose
  an innovative method to explore the Bell inequality in massless quark pai
 r systems by analyzing the azimuthal correlations in $\\pi^+\\pi^-$ dihadr
 on pair production at lepton colliders. Revisiting the Belle data\, we hav
 e shown the potential to detect Bell inequality violation of light quarks 
 by introducing an additional angular cut\, achieving a significance of 2.5
  $\\sigma$ even in the worst-case scenario of 100\\% correlated systematic
  uncertainties in each bins. The significance substantially exceeds $5\\si
 gma$ when considering uncorrelated systematic uncertainties. Our approach 
 opens avenues for exploring spin quantum information with non-perturbative
  processes as spin analyzer and leverages existing data for quantum inform
 ation research.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1919/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1919/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Perturbative cosmological phase transitions in a broad temperature
  range
DTSTART;VALUE=DATE-TIME:20250927T010000Z
DTEND;VALUE=DATE-TIME:20250927T013000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1924@indico.itp.ac.cn
DESCRIPTION:Speakers: Philipp Schicho (University of Geneva)\nCosmological
  phase transitions\, particularly the electroweak one\, continue to draw a
 ttention due to their potential to generate a stochastic gravitational wav
 e background and to provide a possible mechanism for baryogenesis.\n\nIn t
 his talk\, I will discuss the perturbative description of such transitions
 \, focusing on recent developments in high-temperature effective field the
 ory (EFT) relevant to transition thermodynamics. Key aspects include the a
 utomated construction of the high-temperature EFT\, the identification of 
 the effective transition scale for nucleation\, and the incorporation of t
 he final perturbative order of soft fluctuations in the effective potentia
 l. Ultimately\, by examining the structure of higher-dimensional operators
  in the EFT\, we gain an appreciation for the limitations of the high-temp
 erature expansion\, particularly in describing the strongest transitions.\
 n\nConfronted with these limitations\, I will conclude by outlining old an
 d new strategies to systematically extend perturbative control beyond the 
 high-temperature regime\, enabling descriptions valid across a broader tem
 perature range.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1924/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1924/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Reaching the Ultimate Quantum Precision Limit at Colliders: Condit
 ions and Case Studies
DTSTART;VALUE=DATE-TIME:20250928T010000Z
DTEND;VALUE=DATE-TIME:20250928T013000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1931@indico.itp.ac.cn
DESCRIPTION:Speakers: xiaoping wang (Beihang University)\nWe investigate w
 hether collider experiments can reach the quantum limit of precision\, def
 ined by the quantum Fisher information (QFI)\, using only classical observ
 ables such as particle momenta. As a case study\, we focus on the τ+τ−
  system and the decay channel τ → πν\, which offers maxi- mal spin-an
 alyzing power and renders the decay a projective measurement. We develop a
  general framework to determine when collider measurements can\, in princi
 ple\, saturate the QFI in an en-\ntangled biparticle system\, and this fra
 mework extends naturally to other such systems. Within this framework\, QF
 I saturation occurs if and only if the symmetric logarithmic derivative (S
 LD) com- mutes with a complete set of orthonormal separable projectors ass
 ociated with collider-accessible measurements. This separability condition
 \, reflecting the independence of decay amplitudes\, is highly nontrivial.
  To meet this condition\, a key requirement is that the spin density matri
 x be rank-deficient\, allowing the SLD sufficient freedom. We show that th
 e classical Fisher information asymptotically saturates the QFI for magnet
 ic dipole moments and CP-violating Higgs interactions in selected phase-sp
 ace regions\, but not for electric dipole moments. These results bridge qu
 an- tum metrology and collider physics\, providing a systematic method to 
 identify quantum-optimal sensitivity in collider experiments.\n\nhttps://i
 ndico.itp.ac.cn/event/349/contributions/1931/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1931/
END:VEVENT
BEGIN:VEVENT
SUMMARY:AI enhanced event reconstruction and physics measurements: impact 
 at CEPC Physics reach
DTSTART;VALUE=DATE-TIME:20250928T003000Z
DTEND;VALUE=DATE-TIME:20250928T010000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1922@indico.itp.ac.cn
DESCRIPTION:Speakers: manqi ruan (IHEP)\nThe Higgs factory is regarded as 
 the highest priority future collider priority\, as it could provide decisi
 ve data on our exploration to multiple profound mysteries\, including the 
 origin of mass\, origin of matter\, nature of dark matter\, etc. Take the 
 Circular Electron Positron Collider as an example\, it is expected to deli
 ver 4 million Higgs bosons\, hundreds of Millions of W bosons\, 4 Tera Z b
 osons\, and potentially also 1 million top quarks in an extremely clean co
 llision environment. The CEPC could well be the gateway towards the profou
 nd physics principles\, by hundreds of promising observations though not o
 nly the precise Higgs measurements\, but also Electroweak\, Flavor physics
  measurements and direct New Physics signal hunting. \n\n        The extre
 mely rich physics program at the CEPC poses stringent requirements on the 
 detector performance\, which could be addressed by the state-of-the-art de
 tector design\, detector technology\, meanwhile\, the AI technology could 
 further and strongly boost the discovery power of the Higgs factory. This 
 talk presents several corner stones of the AI enhanced reconstruction and 
 analysis methods at the CEPC\, including the Holistic approach that could 
 significantly boost the performance of different jets identification and t
 he signal-background separation\, the Color Singlet identification which i
 s critical for the physics measurements with full hadronic events\, and th
 e Particle Flow that pursues the 1-1 correspondence between reconstructed 
 particle and final state particles.\n\nhttps://indico.itp.ac.cn/event/349/
 contributions/1922/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1922/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leptogenesis via new spectator process
DTSTART;VALUE=DATE-TIME:20250926T090000Z
DTEND;VALUE=DATE-TIME:20250926T093000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1908@indico.itp.ac.cn
DESCRIPTION:Speakers: Wei Chao (Beijing Normal University)\nIn this talk\,
  I will present a novel mechanism that may provide either the B-L violatin
 g source term or a brand-new spectator process for Leptogenesis mechanism.
  Given initial densities for various SM fermions that keep B-L=0\, non-zer
 o baryon asymmetry  of the universe can be generated.\n\nhttps://indico.it
 p.ac.cn/event/349/contributions/1908/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1908/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anatomy of Parity-violating Trispectra in Galaxy Surveys
DTSTART;VALUE=DATE-TIME:20250926T010000Z
DTEND;VALUE=DATE-TIME:20250926T013000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1916@indico.itp.ac.cn
DESCRIPTION:Speakers: Yiming Zhong (City University of Hong Kong)\nParity-
 violating interactions are ubiquitous phenomena in particle physics. If th
 ey are significant during cosmic inflation\, they can leave imprints on pr
 imordial perturbations and be observed in correlation functions of galaxy 
 surveys. Importantly\, parity-violating signals in the four-point correlat
 ion functions (4PCFs) cannot be generated by Einstein gravity in the late 
 universe on large scales\, making them unique and powerful probes of high-
 energy physics during inflation. However\, the complex structure of the 4P
 CF poses challenges in diagnosing the underlying properties of parity-viol
 ating interactions from observational data. We introduce a general framewo
 rk that provides a streamlined pipeline directly from a particle model in 
 inflation to galaxy 4PCFs in position space. We demonstrate this framework
  with a series of toy models and the tree-level exchange-type processes wi
 th chemical-potential-induced parity violation. We further showed the dete
 ction sensitivity of these models from BOSS data and highlighted potential
  challenges in data interpretation and model prediction.\n\nhttps://indico
 .itp.ac.cn/event/349/contributions/1916/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1916/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anatomy of Family Trees in Cosmological Correlators
DTSTART;VALUE=DATE-TIME:20250926T003000Z
DTEND;VALUE=DATE-TIME:20250926T010000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1933@indico.itp.ac.cn
DESCRIPTION:Speakers: Zhong-Zhi Xianyu (Tsinghua University)\nCosmological
  correlators encode rich information about quantum field theories in a cos
 mological background and are key observables of cosmological collider phys
 ics. However\, their analytical computation is a hard problem due to the i
 nherent complexities of these functions. Recently\, we solved this problem
  for all tree-level massive correlators and revealed a universal structure
  of family trees. In this talk\, I will introduce the recent progress on t
 his front.\n\nhttps://indico.itp.ac.cn/event/349/contributions/1933/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1933/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Implications of Topological Field Configurations for Baryon Asymme
 try and Dark Matter
DTSTART;VALUE=DATE-TIME:20250929T031000Z
DTEND;VALUE=DATE-TIME:20250929T033000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1913@indico.itp.ac.cn
DESCRIPTION:Speakers: Wu Yanda (Tsung-Dao Lee Institute)\nTopological fiel
 d solutions – such as sphaleron\, monopole\, and cosmic strings – can 
 have important implications on the unsolved questions of our universe\, no
 tably the origin of baryon asymmetry and the nature of dark matter. Many b
 aryogenesis mechanisms (for example\, electroweak baryogenesis and leptoge
 nesis) depend on sphaleron transition\; consequently\, a theoretical rubos
 t and consistent computation of sphaleron rate is essential. Monopoles or 
 cosmic strings (e.g.\, in Abelian–Higgs models) that arise in many beyon
 d the Standard Model (BSM) scenarios can alter the relic abundance of WIMP
 s and/or axion-like particles (ALPs). I discuss recent progress in computi
 ng sphaleron rate and examine the impact of topological defects on dark-ma
 tter relic densities.\n\nhttps://indico.itp.ac.cn/event/349/contributions/
 1913/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1913/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Radiative Corrections for Precision Neutrino Physics
DTSTART;VALUE=DATE-TIME:20250926T060000Z
DTEND;VALUE=DATE-TIME:20250926T063000Z
DTSTAMP;VALUE=DATE-TIME:20260521T022211Z
UID:indico-contribution-349-1948@indico.itp.ac.cn
DESCRIPTION:Speakers: Shun Zhou (IHEP)\nhttps://indico.itp.ac.cn/event/349
 /contributions/1948/
LOCATION:北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Reso
 rt Hotel）
URL:https://indico.itp.ac.cn/event/349/contributions/1948/
END:VEVENT
END:VCALENDAR