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BEGIN:VEVENT
SUMMARY:Tracing out massive fields in cosmology
DTSTART;VALUE=DATE-TIME:20261024T075000Z
DTEND;VALUE=DATE-TIME:20261024T081000Z
DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-3003@indico.itp.ac.cn
DESCRIPTION:Speakers: Guanhao Sun (Chongqing University)\nCosmological cor
 relators are calculated through the in-in formalism in (quasi-)de Sitter b
 ackground. Their effective description is best represented by a reduced de
 nsity matrix. In this talk\, I will first review the differences between t
 he usual EFT used in scattering amplitude calculations and the Schwinger-K
 eldysh EFT for correlators. I will then discuss the reduced density matrix
  for a light field at finite time\, obtained by tracing out a massive fiel
 d in a quasi-single-field model with non-linear couplings. The trace gener
 ates branch-mixing terms which are generally present in the Schwinger-Keld
 ysh formalism. Explicit calculations of the effective description and the 
 bispectrum will be shown for a conformally coupled massive field. I will t
 hen discuss how a local effective field theory is obtained through a large
  mass expansion of the exact non-local effective description. Finally\, I 
 will study the symmetry and Schwinger-Keldysh constraints on the reduced d
 ensity matrix.\n\nhttps://indico.itp.ac.cn/event/427/contributions/3003/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/3003/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Violation and Restoration of Probability Positivity in Perturbativ
 e Quantum Field Theory
DTSTART;VALUE=DATE-TIME:20261024T060000Z
DTEND;VALUE=DATE-TIME:20261024T062000Z
DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-2999@indico.itp.ac.cn
DESCRIPTION:Speakers: Bin Gong ()\nWe address the long-standing problem of
  negative decay and production rates in perturbative QCD \nfor exclusive p
 rocesses by proposing amplitude-level NRQCD factorization as a systematic 
 prescription. \nBuilding on this\, we present the first complete next-to-n
 ext-to-leading-order (NNLO) QCD correction to \nthe decay $J/\\psi \\to 3\
 \gamma$. The resulting partial width\, \n$\\Gamma(J/\\psi \\to 3\\gamma) =
  0.96^{+4.32}_{-0.13}$ eV\, combines this NNLO contribution with \nthe kno
 wn up to $\\mathcal{O}(\\alpha_s v^2)$ relativistic correction and shows m
 arkedly improved \nagreement with the high-precision BESIII measurement. I
 n the same way\, \n$\\Gamma(\\Upsilon \\to 3\\gamma) = 0.0086^{+0.0028}_{-
 0.0006}$ eV is obtained. \n\nFrom a first-principles perspective\, it is c
 lear that for exclusive processes\, taking the complete \nmodulus squared 
 of the full amplitude is precisely the proper definition of the probabilit
 y \ndistribution and guarantees its manifest positivity. This makes the am
 plitude-level prescription \nthe natural and physically motivated scheme. 
 For inclusive processes\, however\, one is forced to \nabandon the full mo
 dulus square due to the need to cancel infrared divergences at the level o
 f \nthe truncated squared amplitude.\n\nBased on arXiv:2603.26199.\n\nhttp
 s://indico.itp.ac.cn/event/427/contributions/2999/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2999/
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BEGIN:VEVENT
SUMMARY:Parameter degeneracy and information loss in inverse flavor mappin
 g for high-energy astrophysical neutrinos
DTSTART;VALUE=DATE-TIME:20261025T081000Z
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DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-2991@indico.itp.ac.cn
DESCRIPTION:Speakers: Zi-Qiang Chen (HIAS-UCAS)\nGiven a high-energy astro
 physical neutrino flux\, its source flavor ratios $\\eta = \\{\\eta^{}_e\,
  \\eta^{}_\\mu\, \\eta^{}_\\tau\\}$ are correlated with the ones $f = \\{f
 ^{}_e\, f^{}_\\mu\, f^{}_\\tau\\}$ measured at a neutrino telescope via $f
  = P \\eta$\, where the elements of $P$ consist of four lepton flavor mixi
 ng parameters. But realistic inverse flavor mapping $\\eta = P^{-1} f$ enc
 ounters unavoidable parameter degeneracy and information loss\, especially
  in or near the $\\det P = 0$ limit allowed by current neutrino oscillatio
 n data. In this work we explore the parameter correlation condition for $\
 \det P = 0$ including the $\\mu$-$\\tau$ reflection symmetry case\, formul
 ate the corresponding constraints on $f^{}_e$ and $f^{}_\\mu$ versus $\\et
 a^{}_e$ and $\\eta^{}_\\mu$\, and illustrate to what extent the source fla
 vor distribution can be mapped by using the recent IceCube all-sky neutrin
 o flux data ranging from 5 TeV to 10 PeV under the assumption that the rel
 evant sources have a common flavor composition.\n\nhttps://indico.itp.ac.c
 n/event/427/contributions/2991/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2991/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Universal two-zero texture in SO(10): implications of JUNO and rea
 lization from non-invertible symmetries
DTSTART;VALUE=DATE-TIME:20261025T075000Z
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DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-2992@indico.itp.ac.cn
DESCRIPTION:Speakers: Wen-Hao Jiang (HIAS\, UCAS)\nWe apply the universal 
 two-zero texture (UTZT) to all quark and lepton mass matrices in the SO(10
 ) grand unified framework. With charged fermion masses fixed at their best
 -fit values\, this texture contains only seven free parameters to account 
 for nine flavor observables\, rendering it highly predictive. Motivated by
  the recent JUNO indication in favor of the normal ordering of light neutr
 ino masses\, we perform an updated analysis of the UTZT in SO(10). The tex
 ture remains fully compatible with all current flavor data. The Dirac phas
 e is predicted mainly in two regions\, one of which matches very well with
  current data. A meV-scale mββ is predicted\, beyond the sensitivity bou
 nd of future neutrinoless double beta decay measurements. We further explo
 re the origin of the UTZT from non-invertible symmetries\, without introdu
 cing additional low-energy degrees of freedom. We show that the UTZT can b
 e realized through non-invertible selection rules arising from the Z_3 gau
 ging of Z_N\, with a minimal realization corresponding to N = 7\n\nhttps:/
 /indico.itp.ac.cn/event/427/contributions/2992/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2992/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Investigation of a Diphoton Excess Near 152 GeV in Association wit
 h Dijets Using Run 3 Data at the LHC
DTSTART;VALUE=DATE-TIME:20261025T073000Z
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UID:indico-contribution-654-2990@indico.itp.ac.cn
DESCRIPTION:Speakers: Arnav Chauhan (Institute of High Energy Physics)\nTh
 e multi-lepton anomalies observed at the LHC have motivated models with ne
 w scalar resonances\, predicting a scalar at $150\\pm5$ GeV. A narrow exce
 ss near $m_S=152\\pm1$ GeV was observed in Run 2 data in the $\\gamma\\gam
 ma$\, $Z\\gamma$\, and $W^+W^-$ channels with a significance surpassing $5
 \\sigma$. In this work\, we investigate a new excess in the ATLAS Run 3 da
 ta using diphoton production in association with two jets\, focusing on ev
 ent topologies similar to vector-boson fusion (VBF). The excess is studied
  using two simplified models\, a singlet extension of the two-Higgs-double
 t model (2HDM+S) and the Higgs Triplet Model (HTM). Following the recent A
 TLAS publication\, a three-class neural network is used to separate VBF\, 
 gluon-gluon fusion\, and non-resonant $\\gamma\\gamma+jj$ production. The 
 published ATLAS analysis is recast by fitting the $m_{\\gamma\\gamma}$ spe
 ctrum near $152$ GeV\, giving a combined significance of $2.5\\sigma$ usin
 g a part of the Run 3 dataset. The corresponding fiducial cross sections f
 or HTM and 2HDM+S are $9.44\\pm4.74$ fb and $7.41\\pm3.54$ fb\, respective
 ly. The observed Run 3 excess is consistent and serves as further confirma
 tion of the scalar candidate identified in Run 2\, motivating further inve
 stigation with the full Run 3 dataset.\n\nhttps://indico.itp.ac.cn/event/4
 27/contributions/2990/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2990/
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BEGIN:VEVENT
SUMMARY:Addressing the CP-strong problem with two heavy axions
DTSTART;VALUE=DATE-TIME:20261025T064000Z
DTEND;VALUE=DATE-TIME:20261025T070000Z
DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-2996@indico.itp.ac.cn
DESCRIPTION:Speakers: Vigilante di Risi (ICTP-AP\, University of Chinese A
 cademy of Science)\nWe present a mechanism to solve the CP-strong problem 
 with two heavy axions in a composite Higgs . An $Sp(8)$ technicolour group
  drives electroweak symmetry breaking by producing the Higgs as a pseudo-N
 ambu–Goldstone boson of the associated flavour symmetry breaking. The sa
 me sector generates the Standard Model Yukawa hierarchies through fundamen
 tal partial compositeness. At high energy\, colour and technicolour are un
 ified into $SU(11)\\times Sp'(8)$\, a UV completion engineered so that the
  two physical axion masses receive contributions both from $Sp'(8)$ small 
 instantons and from the $Sp(8)$ confinement scale\, naturally raising them
  well above the QCD axion mass. We analyse the pseudo-Nambu–Goldstone bo
 son spectrum of the technicoloured sector\, the resulting axion mass matri
 x\, and the flavour structure of the Standard Model.\n\nhttps://indico.itp
 .ac.cn/event/427/contributions/2996/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2996/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Solving the Strong CP Problem with Heavy Axions
DTSTART;VALUE=DATE-TIME:20261025T062000Z
DTEND;VALUE=DATE-TIME:20261025T064000Z
DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-2997@indico.itp.ac.cn
DESCRIPTION:Speakers: Xu-Hui Jiang (ICTP-AP)\nWe propose a general framewo
 rk that extends the Standard Model (SM) to the gauge group $SU(2k+3)\\time
 s Sp(2k)'\\times U(1)_Y'\\times Z_4$. The SM quarks are embedded in the fu
 ndamental multiplet of $SU(2k+3)$\, $Sp(2k)'$ provides an extra technicolo
 r (TC) sector\, $U(1)_Y'$ helps reproduce the correct SM hypercharges\, an
 d\, the discrete $Z_4$ forbids unwanted TC fermion mass terms. The strong 
 CP problem is solved by two axions associated with the two non-Abelian gro
 ups. Both axions can be made heavy by the combined effects of small instan
 tons and TC confinement. We scan the viable parameter space for different 
 values of $k$ and present the resulting axion spectrum. The predicted mass
 es lie well above the conventional QCD-axion window and open a richer set 
 of phenomenological signatures for experimental searches.\n\nhttps://indic
 o.itp.ac.cn/event/427/contributions/2997/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2997/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Entanglement Maximization and Symmetry Selection in Composite Higg
 s Models
DTSTART;VALUE=DATE-TIME:20261025T060000Z
DTEND;VALUE=DATE-TIME:20261025T062000Z
DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-2995@indico.itp.ac.cn
DESCRIPTION:Speakers: Mingdi Zhu ()\nWe propose a general mechanism for so
 lving the strong CP problem with a heavy axion generated by confinement in
  a mirror sector. We present a simple realization of our mechanism in a mi
 rror grand unified theory (GUT). The mirror GUT sector remains unbroken an
 d dynamically generates a calculable heavy mass scale via confinement with
 out fine tuning. Models in this class feature a heavy axion\, whose potent
 ial is less sensitive to Planck-scale corrections\, as well as a rich hidd
 en sector from the confined mirror GUT. The solution to the strong CP prob
 lem remains unspoiled by the presence of additional phases in the GUT Yuka
 was\, while still allowing the possibility of electric dipole moments with
 in the reach of future experiments. Our proposal offers new directions in 
 GUT model building\, axion phenomenology\, dark matter\, and cosmology.\n\
 nhttps://indico.itp.ac.cn/event/427/contributions/2995/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2995/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Axion-magnetic resonance in the lab\, the sun\, and the galaxy
DTSTART;VALUE=DATE-TIME:20261024T081000Z
DTEND;VALUE=DATE-TIME:20261024T083000Z
DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-2993@indico.itp.ac.cn
DESCRIPTION:Speakers: Chen Sun (HIAS-UCAS)\nAxion–photon conversion in m
 agnetic fields provides a powerful probe of axions\, but its sensitivity i
 s often limited by the loss of coherence between axions and photons. Axion
 -magnetic resonance (AMR) overcomes this limitation through spatial or tem
 poral variations of the magnetic field that compensate for their momentum 
 mismatch. I will introduce this mechanism and discuss how it finds applica
 tions across different scales: specifically designed magnetic field profil
 es can extend the reach of laser-based laboratory axion searches [PRD 110 
 (2024) 1\, 015018]\; probe new QCD axion parameter space through solar hel
 ioscopes [JHEP 03 (2025) 071]\; and lead to novel X-ray emission in galaxi
 es (to appear in 2026).\n\nhttps://indico.itp.ac.cn/event/427/contribution
 s/2993/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2993/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Quantum Magic of Standard Model Parameters
DTSTART;VALUE=DATE-TIME:20261024T073000Z
DTEND;VALUE=DATE-TIME:20261024T075000Z
DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-3000@indico.itp.ac.cn
DESCRIPTION:Speakers: 喆伟 殷 (IHEP)\nThe scattering of microscopic par
 ticles generically gives rise to highly structured quantum final states. A
  growing body of work has begun to explore whether the quantum-information
  characteristics of these states are merely emergent\, or whether they enc
 ode deep principles of the underlying quantum field theory. Among these ch
 aracteristics is magic\, or non-stabilizerness\, which measures the intrin
 sic nonclassical computational power of a quantum state. We present eviden
 ce that a fundamental parameter of the Standard Model—the weak mixing an
 gle—may be selected by minimizing the magic of the final states arising 
 from simple lepton scattering processes. These observations motivate a sys
 tematic exploration of particle scattering from the perspective of quantum
  information theory.\n\nhttps://indico.itp.ac.cn/event/427/contributions/3
 000/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/3000/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Neutrino Magnetic Moments from Inverse Seesaw with Novel Horizonta
 l Symmetry
DTSTART;VALUE=DATE-TIME:20261024T064000Z
DTEND;VALUE=DATE-TIME:20261024T070000Z
DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-2989@indico.itp.ac.cn
DESCRIPTION:Speakers: Kaladharan Ajay (ICTP-AP)\nMechanisms that generate 
 large neutrino magnetic moments consistent with observed neutrino masses t
 ypically decouples the mechanism responsible for neutrino mass and the neu
 trino magnetic moment. In this letter\, we propose a novel framework to ex
 plain neutrino mass while accommodating a large magnetic moment for the ac
 tive neutrinos. The SM neutrinos get mass via the inverse seesaw mechanism
 . We introduce a novel horizontal-like softly broken $SU(2)_N$ symmetry in
  which SM particles are singlets. In the $SU(2)_N$ symmetric limit\, one o
 f the fermionic states participating in the inverse seesaw can possess a l
 arge magnetic moment while remaining massless. The $SU(2)_N$ symmetry is s
 oftly broken\, and SM neutrinos obtain nonzero neutrino mass and large mag
 netic moment via sterile-active neutrino mixing. The active neutrinos can 
 exhibit transition magnetic moments as large as $\\mathcal{O}(10^{-11}\\mu
 _B)$.\n\nhttps://indico.itp.ac.cn/event/427/contributions/2989/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2989/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Radiative corrections to neutron and inverse beta decay at low ene
 rgies
DTSTART;VALUE=DATE-TIME:20261024T062000Z
DTEND;VALUE=DATE-TIME:20261024T064000Z
DTSTAMP;VALUE=DATE-TIME:20261025T043752Z
UID:indico-contribution-654-2998@indico.itp.ac.cn
DESCRIPTION:Speakers: Sasha Tomalak (ITP/CAS)\nWe compute electromagnetic 
 radiative corrections in the inverse beta decay at reactor antineutrino en
 ergies within the heavy baryon chiral perturbation theory\, provide the mo
 st accurate cross-section predictions for this process\, present a complet
 e error budget\, and investigate impact on the energy reconstruction at JU
 NO. For the first time\, we consistently include quantum electrodynamics\,
  chromodynamics\, and electroweak contributions and present the positron e
 nergy spectrum accounting for radiative corrections. Additionally\, we inc
 lude contributions from virtual pions and delta resonance to inverse beta 
 decay and quantify the relation between the experimental value of the nucl
 eon axial-vector charge and its evaluations within the lattice quantum chr
 omodynamics.\n\nhttps://indico.itp.ac.cn/event/427/contributions/2998/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2998/
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