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The 2023 Shanghai Symposium on Particle Physics and Cosmology: Phase Transitions, Gravitational Waves, and Colliders (SPCS 2023)

22–24 Sept 2023
Tsung-Dao Lee Institute
Asia/Shanghai timezone

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Contribution List

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  1. 57. Welcome
    Prof. Michael Ramsey-Musolf
    22/09/2023, 08:45
  2. 12. First Order Phase Transitions: How, When and Why?
    Prof. Andrea Addazi (SiChuan University)
    22/09/2023, 09:00

    We discuss several possible scenarios for first order phase transitions (FOPTs) in early Universe
    which can be tested from gravitational waves interferometers and pulsar timing radio-astronomy. Many FOPTs are inspired by Dark Matter, Neutrino mass, baryon/lepton violations, baryogengesis and Grand Unification Theories.
    We will not only discuss first electroweak phase transitions but also...

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  3. 34. Constraining the Cosmological Phase Transition by Real Data
    Jing Shu
    22/09/2023, 09:30
  4. 35. Science with Tianqin
    Jian-Dong Zhang
    22/09/2023, 10:30
  5. 36. Taiji and milli-Hz Gravitational Wave Astronomy
    Wenbiao Han (SHAO)
    22/09/2023, 11:00
  6. 37. Ali CMB Polarization Telescope
    Hong Li
    22/09/2023, 11:30
  7. 26. Extended Scalar Sectors and Baryogenesis: The CP story
    Jose Miguel No (IFT-UAM/CSIC)
    22/09/2023, 13:30

    I will give a personal perspective on the possibility of achieving EW baryogenesis in extensions of the SM, based on enhancing the CP violating sources in the early Universe as compared to the ones constrained by EDMs at present times.

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  8. 54. Addressing the Gravitational Wave - Collider Inverse Problem
    Van Que Tran (TDLI- Shanghai Jiao Tong University)
    22/09/2023, 14:00

    This talk is based on arXiv:2203.05889. Next generations of gravitational wave and future collider detectors can probe beyond the Standard Model theories that predict a strong first order electroweak phase transition. A combination of these two signals could be used to determine BSM scenarios and to measure relevant model parameters. In this talk, I will show a roadmap for addressing this...

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  9. 6. Gravitational waves from phase transitions during inflation
    Haipeng An (Tsinghua University)
    22/09/2023, 14:30

    The large excursion of the inflaton may trigger phase transitions in the spectator sector that couples to the inflaton field. Such phase transitions can produce gravitational waves. In this talk, I will discuss the properties of the gravitational waves produced in this way. I will discuss both first- and second-order phase transitions. The phase transitions during inflation can also produce...

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  10. 39. Search for Di-Higgs resonances in the ATLAS experiment
    Ligang Xia
    22/09/2023, 15:30
  11. 40. HH searches with VBF and VHH at the CMS experiment
    Prof. Xiaohu SUN (Peking University), Xiaohu Sun (pku)
    22/09/2023, 16:00
  12. 14. Higgs physics highlights from the CMS experiment
    Chen Zhou (Peking University)
    22/09/2023, 16:30

    This talk will highlight some recent Higgs physics results from the CMS experiment.

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  13. 55. Status and Experiments of the CEPC
    Manqi RUAN (Institute of High Energy Physics, Beijing, China)
    22/09/2023, 17:00
  14. 8. Solitons and Primordial black holes from a boiling Universe
    Prof. Ke-Pan Xie (Beihang University)
    23/09/2023, 08:30

    -

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  15. 46. Anatomy of the electroweak phase transition for dark sector induced baryogenesis
    Yingying Li (USTC)
    23/09/2023, 09:00
  16. 33. Triple Higgs coupling, GWs and PBH as probes of 1st order EW Phase Transition
    Shinya Kanemura
    23/09/2023, 09:30
  17. 42. New approaches to false vacuum decay and produced gravitational waves
    Yun Jiang
    23/09/2023, 10:30
  18. 43. Electroweak phase transition patterns: an effective perspective
    Jiang-Hao Yu
    23/09/2023, 11:00
  19. 51. Dark photon/EWPT
    Gang Li (Sun Yat-Sen University)
    23/09/2023, 11:30
  20. 3. Perturbative EFT expansions for cosmological phase transitions
    Dr Tuomas Tenkanen (Nordita, Tsung-Dao Lee Institute, Helsinki Institute of Physics)
    23/09/2023, 13:30

    Gravitational waves (GW) from cosmological phase transitions bear huge discovery potential and can be probed by planned future space-based experiments. Complementary to current and future collider experiments, such GW signatures can offer a powerful probe for beyond the Standard Model physics. Predictions for stochastic GW spectrum of a cosmological origin are often plagued by large...

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  21. 4. From first order phase transitions to gravitational waves
    Prof. Andrew Fowlie (XJTLU, Suzhou), Peter Athron (Nanjing Normal University)
    23/09/2023, 14:00

    Gravitational waves have now emerged as an important experimental test of first-order phase transitions in the early Universe and we have entered an era in which predictions from particle physics models can be compared to existing gravitational wave data. In this two-part talk, we review the path from a particle physics model that can admit first-order cosmological phase transitions to...

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  22. 41. Probing Electroweak Phase Transition in the Singlet Standard Model at the LHC
    Wenxing Zhang
    23/09/2023, 14:30
  23. 9. Higgsless simulations of first-order phase transitions and gravitational wave production
    Ryusuke Jinno (RESCEU, The University of Tokyo)
    23/09/2023, 15:30

    Gravitational waves offer a unique probe to the early Universe. A particularly interesting scenario is that of a first-order phase transition, in which bubbles of true vacuum nucleate, expand, and collide, involving the dynamics of surrounding plasma particles. In this talk, we introduce the Higgsless scheme for numerical simulations of sound waves and the resulting gravitational wave...

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  24. 20. First principles determination of bubble wall velocity and local thermal equilibrium approximation
    Benoit Laurent (McGill University)
    23/09/2023, 16:00

    I will briefly review the fluid equations needed to compute the wall velocity from first principles. As a concrete example, I will apply these equations to the singlet scalar extension of the Standard Model. The solutions obtained can naturally be classified as deflagration/hybrid walls ($v_w \sim c_s$) or ultrarelativistic detonations. In the second part, I will explain how this calculation...

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  25. 10. Hydrodynamic perspectives on cosmological first-order phase transitions
    Shao-Jiang Wang (Institute of Theoretical Physics, Chinese Academy of Sciences)
    23/09/2023, 16:30

    The detection of stochastic gravitational wave backgrounds from cosmological first-order phase transitions (FOPT) is a promising probe for new physics beyond the standard model of particle physics. However, the terminal wall velocity as one of the key parameters has been largely left undetermined thanks to its intimate relation to the non-equilibrium nature of FOPT near the bubble wall. In...

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  26. 56. Summary of the LHC Anomaly Workshop
    Bruce Mellado (University of the Witwatersrand and iThemba LABS)
    23/09/2023, 17:00
  27. 1. Gravitational waves from Dark Phase Transitions at Strong Coupling
    Nicklas Ramberg (JGU Mainz)
    23/09/2023, 19:00

    In this talk, we demonstrate how to predict the gravitational wave spectra of Strongly coupled QFTs using holography and lattice data input for a pure SU(N) Yang-Mills theory with small uncertainties. We will elaborate on how we obtain an effective potential using holography with the free energy landscape approach and formulate an effective action. Once the effective action is in our grasp, we...

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  28. 11. Hydrodynamic sound shell model and bubble wall velocity
    Zi-Yan Yuwen (Institute of Theoretical Physics, Chinese Academy of Sciences)
    23/09/2023, 19:00

    For a cosmological first-order phase transition in the early Universe, the associated stochastic gravitational wave background is usually dominated by sound waves from plasma fluid motions, which have been analytically modeled as a random superposition of freely propagating sound shells but with the force by the scalar field that produces the self-similar profile removed. Recently, we proposed...

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  29. 17. Confinement Phase Transition with Quasi-paticle model and its Gravitational wave signal
    Jiang Zhu (Shanghai jiao tong Univercity)
    23/09/2023, 19:20

    It is challenging to build a model that can correctly and unifiedly account for the deconfinement phase transition and thermodynamics of the hot $SU(N)$ pure Yang-Mills (PYM) system, for any $N$. In this article, we slightly generalize the massive PYM model to the situation with a quasigluon mass $M_g(T)$ varying with temperature, inspired by the quasigluon model. In such a framework, we can...

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  30. 2. Cosmic Stasis from Primordial-Black-Hole Evaporation and Its Phenomenological Implications
    Fei Huang (Weizmann Institute of Science)
    23/09/2023, 19:20

    Cosmic stasis is a phenomenon in which the abundances of multiple cosmological energy components — components such as matter, radiation, or vacuum energy — remain effectively constant despite the expansion of the universe. One mechanism which can give rise to an extended period of cosmic stasis is the evaporation of a population of primordial black holes (PBHs). In this talk, I review how PBH...

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  31. 21. Electroweak sphalerons, scalar multiplets, and symmetry breaking patterns
    Yanda Wu
    23/09/2023, 19:40

    In this study, we present a comprehensive analysis of the electroweak sphaleron formalism and its application to electroweak phase transition (EWPT) patterns in extensions of the Standard Model scalar sector with electroweak multiplets. We offer an equivalence proof for different choices for the form of sphaleron configurations; construct the previously unestablished high-dimensional...

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  32. 5. Stochastic gravitational wave background: birth from axionic string-wall death
    Shuailiang Ge (Peking University)
    23/09/2023, 19:40

    This talk is based on the paper arXiv: 2307.08185. I will introduce a new source of stochastic gravitational wave background (SGWB) from the final collapse of a string-wall network. In the context of $N_{\rm DW}=1$ axionic string-wall network, the final collapse of walls bounded by strings can release gravitational waves (GWs). This source is typically considered negligible due to its...

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  33. 59. Gravitational Waves Produced by Domain Walls During Inflation
    Chen Yang
    23/09/2023, 20:00
  34. 58. Lattice study of singlet-assisted electroweak phase transition
    Guotao Xia
    23/09/2023, 20:00

    In this study, we use lattice to reveal nonperturbative information of the electroweak phase transition in the real-singlet extension of the Standard Model, based on the 2-loop 3D EFT framework.
    Importantly, the new information is that the lattice determines the true nature of the electroweak phase transition, capable to identify it as the first order type or not, an important qualitative...

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  35. 29. Bubble Expansion at Strong Coupling & General Backreaction Force
    Jun-Chen Wang (Peking University)
    23/09/2023, 20:20

    In this report, we show our recent two works. In one of the works, we focus on the backreaction force and point out that besides the friction force, the thermal force should also be taken into consideration. Besides the plasma near the wall, the sound shell and the shock front will also contribute to the backreaction force. In the other work, we derive the test formula for the holographic...

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  36. 31. Instability of the Electroweak Vacuum in Starobinsky Inflation
    Qiang Li
    23/09/2023, 20:20

    We study the stability of the electroweak vacuum during and after the Starobinsky inflation, assuming the existence of the non-minimal Higgs coupling to the Ricci scalar. In the Starobinsky inflation, there exists R2 term (with R being the Ricci scalar), which modifies the evolution equation of the Higgs field. We consider the case that the non-minimal coupling is sizable so that the quantum...

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  37. 30. A new approach to rescue the trapped vacuum
    Dr Dongdong Wei (Sun Yat-sen University)
    23/09/2023, 20:40

    The first-order phase transition is one of the promising scenarios as it can explain the observed matter-antimatter asymmetry of the early universe. In most cases, the transition proceeds through the nucleation of bubbles of the true vacuum. If the nucleation rate is highly suppressed, then vacuum trapping may occur so that the transition ceases. In this work, we will discuss a new approach...

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  38. 7. Collider tests of nanohertz gravitational waves from minimal dark phase transition
    Shaoping Li
    24/09/2023, 08:30

    Recently, compelling evidence of nanohertz gravitational waves is indicated by the pulsar timing array collaborations. In this talk, I will present an MeV-scale first-order phase transition from a minimal dark sector to explain the gravitation waves, with a focus on the collider tests via a minimal Higgs portal. I will demonstrate that to explain the observed gravitational waves, the Higgs...

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  39. 23. Have pulsar timing array methods detected a cosmological phase transition?
    Prof. Antonino Marciano (Fudan University and INFN Frascati)
    24/09/2023, 09:00

    We show [1] that the recent detection of a gravitational wave (GW) background reported by various pulsar timing array (PTA) collaborations including NANOGrav-15yr, PPTA, EPTA, and CPTA can be explained in terms of first order phase transitions (FOPTs) from dark sector models (DSM). Specifically, we explore a model for first order phase transitions that involves the majoron, a Nambu-Goldstone...

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  40. 25. Detecting High-Frequency Gravitational Waves with Astronomical Tools
    Tao Liu (HKUST)
    24/09/2023, 09:30

    TBD

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  41. 47. Non-resonant di-Higgs at ATLAS
    Yaquan Fang (Institute of High Energy Physics)
    24/09/2023, 10:30
  42. 19. DiHiggs combination at the ATLAS experiment
    Yanlin Liu (Shandong University (CN))
    24/09/2023, 11:00

    This talk will present the latest diHiggs combination results (including both resonant and non-resonant) based on the full Run 2 dataset at the at the ATLAS experiment.

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  43. 48. H combination at the CMS experiment
    Meng Xiao
    24/09/2023, 11:30
  44. 49. Collider probes of the Electroweak phase transition for scalar extended models
    Yongcheng Wu (Nanjing Normal University)
    24/09/2023, 14:00
  45. 50. Topological Defects and GWs
    Prof. Ligong Bian (Chongqing University)
    24/09/2023, 14:30
  46. 22. Phase Transition and Gravitational Wave in Strongly Coupled Dark Sectors
    Zhi-Wei Wang (UESTC)
    24/09/2023, 15:30

    We go beyond the state-of-the-art by combining first principal lattice results and effective field theory approaches as Polyakov Loop model to explore the non-perturbative dark deconfinement-confinement phase transition and the generation of gravitational-waves in a dark Yang-Mills theory. We further include fermions with different representations in the dark sector. Employing the...

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  47. 52. EWPT/GW/2HDM
    Sven Heinemeyer
    24/09/2023, 16:00
  48. 53. Conference Close Out
    Prof. Michael Ramsey-Musolf
    24/09/2023, 16:30
  49. 27. Collider probes of the Electroweak phase transition for scalar extended models
    Yongcheng Wu (Nanjing Normal University)

    The detection of the gravitational wave provides new opportunities to probe the evolution of the early Universe. On the other hand, the current and future collider experiments will also play important roles in probe new physics. One of the connections ties on the Electroweak phase transition associated with the scalar sector. The modification from the extended scalar sector will be important...

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  50. 44. cxSM Collider/EWPT
    Yi-Zhou Cai
  51. 13. Detecting gravitational waves in the space: The Taiji project
    Wenbiao Han (SHAO)

    LIGO's detection of gravitational wave events has entered a "new normal", and the era of gravitational wave astronomy has arrived. Constructing a gravitational wave detector with a longer arm length in space can detect low-frequency gravitational waves in the millihertz band. In this talk, I will introduce the Taiji project ---- the space-borne gravitational wave detector by China. Its targets...

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  52. 32. First Order Phase Transitions: How, When and Why?
    Andrea Addazi (SiChuan University)
  53. 45. From first order phase transitions to gravitational waves
    Peter Athron (Nanjing Normal University)
  54. 28. Triple Higgs coupling, GWs and PBH as probes of 1st order EW Phase Transition
    Prof. Shinya Kanemura (Osaka University)

    In this talk, I would like to discuss various phenomenological consequences of first order EW phase transition, which is required for successful EW baryogenesis scenarios. Using the NaHEFT which can describe non-decoupling property of new physics beyond the SM, we evaluate parameter regions in which conditions of strongly 1st order EW Phase Transition and completion of the phase transition are...

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