BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Non-perturbative evolution of the curvature perturbation during in flation. DTSTART;VALUE=DATE-TIME:20260520T094000Z DTEND;VALUE=DATE-TIME:20260520T101000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2433@indico.itp.ac.cn DESCRIPTION:Speakers: DIEGO CRUCES (Institute of Theoretical Physics - Chi nese Academy of Sciences (ITP\,CAS))\nThe statistical properties of the cu rvature perturbation on superhorizon scales during inflation are of signif icant phenomenological interest\, with implications ranging from cosmic mi crowave background (CMB) observations to primordial black hole (PBH) forma tion and induced gravitational waves. In this talk\, I will present and co mpare different techniques for computing these properties: the standard δ N formalism\, the stochastic δN formalism\, and a novel non-perturbative equation of motion for the superhorizon curvature perturbation. I will cla rify the connections between these approaches and specify the regime of va lidity for each.\n\nhttps://indico.itp.ac.cn/event/419/contributions/2433/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2433/ END:VEVENT BEGIN:VEVENT SUMMARY:Radiation-reaction effects at 3PN order in scalar-tensor theories DTSTART;VALUE=DATE-TIME:20260520T091000Z DTEND;VALUE=DATE-TIME:20260520T094000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2473@indico.itp.ac.cn DESCRIPTION:Speakers: Eve Dones (IBS CTPU-CGA)\nWith the advent of third-g eneration gravitational-wave detectors\, it has become crucial to extend a nalytical frameworks used to model waveforms from compact binary systems t o alternative theories of gravity. In this talk\, I will present recent re sults on radiation-reaction effects in a class of scalar–tensor theories . Using the post-Newtonian multipolar post-Minkowskian (PN–MPM) formalis m\, we compute the dissipative contributions to the ten Noetherian conserv ed quantities\, which can be classified into two types: Schott and pseudo- Schott terms. In contrast to general relativity\, where only pseudo-Schott terms contribute to the waveform phasing at 4.5PN order for quasi-circula r orbits\, we find that Schott terms begin to contribute already at 3PN or der\, even in the quasi-circular case. These contributions must therefore be consistently included in the future when extending the energy flux and waveform\, currently known up to 2.5PN order\, to 3PN order.\n\nhttps://in dico.itp.ac.cn/event/419/contributions/2473/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2473/ END:VEVENT BEGIN:VEVENT SUMMARY:Gravitational Waves from Mergers of Asymmetric Dark Stars DTSTART;VALUE=DATE-TIME:20260520T084000Z DTEND;VALUE=DATE-TIME:20260520T091000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2432@indico.itp.ac.cn DESCRIPTION:Speakers: Boris Betancourt Kamenetskaia (Institute for Basic S cience CTPU-CGA)\nA strongly self-interacting component of asymmetric dark matter (DM) particles can form compact dark stars (DSs). These objects ha ve a broad spectrum of masses and radii\, with distinct evolution historie s from both neutron stars and black holes (BHs). These differences allow a population of DSs to contribute significantly to the astrophysical merger rate in unique and discernible ways. Specifically\, their merger rate cou ld dominate at low redshifts over other sources\, while their mass functio n may populate windows outside known astrophysical processes. In this pres entation\, I will summarize the structure and formation of DSs within a di ssipative model\, and show the enhancement of their merger cross-section d ue to tidal deformation effects. From this\, I derive the cosmological DS merger rate and discuss the DM parameter space available for observation. These findings open a new window to probe DM substructure and particle int eractions through present and future gravitational wave (GW) observatories .\n\nhttps://indico.itp.ac.cn/event/419/contributions/2432/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2432/ END:VEVENT BEGIN:VEVENT SUMMARY:Probing Fundamental physics with extreme mass ratio inspirals DTSTART;VALUE=DATE-TIME:20260520T080000Z DTEND;VALUE=DATE-TIME:20260520T084000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2439@indico.itp.ac.cn DESCRIPTION:Speakers: Yungui Gong (Ningbo University)\nExtreme mass ratio inspirals (EMRIs) composed of a stellar-mass object inspiraling into a sup ermassive black hole (SMBH)\, emitting GWs in the milli-Hertz band\, are t he most promising GW sources for space-based observatories. The rich infor mation about the spacetime geometry surrounding the SMBH is encoded in the GWs\, making EMRIs an excellent source for studying black hole physics li ke the charges carried by black holes and the DM halos around black holes. Firstly\, we use EMRIs to probe the charges carried by black holes and th e fundamental fields associated with the charges. Then Using the static an d spherically symmetric metric for a black hole immersed in dark matter (D M) halos with Hernquist\, Burkert\, and Navarro-Frenk-White density distri butions\, we study the possibility of the detection of DM halos and the di stinction between different DM halos with the extreme mass ratio inspiral systems (EMRIs).\n\nhttps://indico.itp.ac.cn/event/419/contributions/2439/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2439/ END:VEVENT BEGIN:VEVENT SUMMARY:Black Holes as Laboratory for Dark Matter DTSTART;VALUE=DATE-TIME:20260520T065000Z DTEND;VALUE=DATE-TIME:20260520T072000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2435@indico.itp.ac.cn DESCRIPTION:Speakers: Qianhang Ding (IBS CTPU-CGA)\nThe dark matter surrou nding black hole would form dense dark environment\, studying the imprint of dark matter on the observational signals from black hole via accretions and dynamical friction could be a dark matter probe. In this talk I am go ing to talk about how to study the nature of dark matter from radio\, opti cs and gravitational wave channels. With these studies\, black hole would be a promising laboratory for dark matter in future observations.\n\nhttps ://indico.itp.ac.cn/event/419/contributions/2435/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2435/ END:VEVENT BEGIN:VEVENT SUMMARY:Boosted dark matter and directional direct detection DTSTART;VALUE=DATE-TIME:20260520T061000Z DTEND;VALUE=DATE-TIME:20260520T065000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2446@indico.itp.ac.cn DESCRIPTION:Speakers: Takaaki Nomura (Sichuan University)\nWe discuss a tw o-component dark matter model in which one component\, heavier dark matter \, annihilates into a lighter dark matter. The lighter dark matter is expe cted to generate detectable signals in detectors due to its enhanced momen tum\, enabling direct detection even for MeV-scale dark matter. We investi gate the effectiveness of directional direct detections\, especially the n uclear emulsion detector NEWSdm\, in verifying these boosted dark matter p articles through nuclear recoil. In particular\, we focus on light nuclei\ , such as protons and carbon\, as suitable targets for this detection meth od due to their high sensitivity to MeV-scale dark matter. By modeling the interactions mediated by a dark photon in a hidden U(1)D gauge symmetry f ramework\, we calculate the expected dark matter flux and scattering rates for various detector configurations. Our results show that nuclear emulsi ons have the potential to yield distinct\, direction-sensitive dark matter signals from the Galactic center\, providing a new way to probe low-mass dark matter parameter spaces that evade conventional detection methods.\n\ nhttps://indico.itp.ac.cn/event/419/contributions/2446/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2446/ END:VEVENT BEGIN:VEVENT SUMMARY:Role of Dark Higgs Boson in (Astro)Particle Physics and Cosmology DTSTART;VALUE=DATE-TIME:20260520T053000Z DTEND;VALUE=DATE-TIME:20260520T061000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2440@indico.itp.ac.cn DESCRIPTION:Speakers: Pyungwon Ko (KIAS QUC)\nI will describe the landscap e of a dark sector with (excited) dark matter and various force mediators controlled by dark gauge symmetry. Then I will discuss the following topic s one by one: (i) Why do we have to consider the dark Higgs boson? (ii) Ga lactic center gamma-ray excess with dark Higgs (iii) WIMP scenario resurre cted with dark Higgs boson (iv) 511 keV gamma ray excess (v) Higgs inflati on assisted with dark Higgs field (vi) Other examples where dark Higgs pla ys crucial roles\n\nhttps://indico.itp.ac.cn/event/419/contributions/2440/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2440/ END:VEVENT BEGIN:VEVENT SUMMARY:Bootstrapping Inflationary New Physics DTSTART;VALUE=DATE-TIME:20260520T031000Z DTEND;VALUE=DATE-TIME:20260520T035000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2475@indico.itp.ac.cn DESCRIPTION:Speakers: Dong-Gang Wang (HKUST)\nOur understanding of the pri mordial Universe largely depends on the information from spatial correlati ons of cosmic-scale matter distributions. Recently\, the advances of the “cosmological bootstrap” program offers new perspectives and powerful tools to study these cosmological correlators. In this talk\, I will revie w the exciting developments along this direction\, with a focus on the phe nomenology and observation frontiers. I will first systematically classify the primary observational target — primordial non-Gaussianities (bispec trum) from cosmic inflation\, incorporating three leading scenarios: singl e field inflation\, cosmological colliders and multi-field inflation. Then \, I will introduce the recent efforts to bootstrap graviton non-Gaussiani ties from massive spinning fields. In the end\, I will present an up-to-da te data analysis of the new predictions using the latest CMB data from Pla nck satellite. Via both CMB-BEST and Modal pipelines\, we identify the mos t significant signal of cosmological collider in the current observation.\ n\nhttps://indico.itp.ac.cn/event/419/contributions/2475/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2475/ END:VEVENT BEGIN:VEVENT SUMMARY:Bootstrap for Features in Cosmological Correlators DTSTART;VALUE=DATE-TIME:20260520T024000Z DTEND;VALUE=DATE-TIME:20260520T031000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2471@indico.itp.ac.cn DESCRIPTION:Speakers: Yuhang Zhu (IBS-CTPU-CGA)\nCosmological correlators are fundamental observables of early universe cosmology and the main targe ts of cosmological surveys. Despite their importance\, computing them rema ins notoriously hard. In this talk\, the speaker will show how to bootstra p several classes of correlators tied to signatures of observational inter est\, including large non-Gaussianities\, primordial features\, and parity violation.\n\nhttps://indico.itp.ac.cn/event/419/contributions/2471/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2471/ END:VEVENT BEGIN:VEVENT SUMMARY:An On-Shell Bootstrap Program of Cosmological Correlators DTSTART;VALUE=DATE-TIME:20260520T020000Z DTEND;VALUE=DATE-TIME:20260520T024000Z DTSTAMP;VALUE=DATE-TIME:20260530T105359Z UID:indico-contribution-554-2463@indico.itp.ac.cn DESCRIPTION:Speakers: Zhong-Zhi Xianyu (Tsinghua University)\nWe develop a new bootstrap strategy for cosmological correlators at loop level\, which we call spectral dispersion. It is based on two conceptual observations t hat a correlator can be recovered from its on-shell data\, also known as n onlocal signals\, by analyticity up to local counterterms\, and that the o n-shell data for a loop process take the form of a discrete sum over quasi normal modes. Technically\, our method combines the dS spectral decomposit ion with dispersion relations. Using this technique\, we bootstrap new res ults in a simple and intuitive form for 3-point and 4-point correlators wi th 1-loop massive exchanges of scalar and vector bosons\, either directly or derivatively coupled. Applications of this bootstrap technique to highe r spins and higher-loop banana graphs are also straightforward.\n\nhttps:/ /indico.itp.ac.cn/event/419/contributions/2463/ LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小 报告厅) 1F-9 URL:https://indico.itp.ac.cn/event/419/contributions/2463/ END:VEVENT END:VCALENDAR