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Particle Physics in the Early Universe

14–18 sept. 2026
Fuseau horaire Europe/Paris

Liste des Contributions

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  1. 46. Welcome
    Prof. Yann Mambrini (CNRS, IJCLab, Université Paris-Saclay)
    14/09/2026 09:45
  2. 2. Searching for cosmic superstrings in Gravitational Waves and the CMB
    Ed Copeland
    14/09/2026 10:00
  3. 3. Dark Matter from a Slightly Broken Mirror
    Juri Smirnov (University of Liverpool)
    14/09/2026 10:45
  4. 30. Developments in gravitational particle production
    Oleg Lebedev (University of Helsinki)
    14/09/2026 12:00
  5. 31. Nonthermal leptogenesis via cosmological gravitational particle production
    Rocky Kolb (The University of Chicago)
    14/09/2026 14:00
  6. 32. Geodesic Completeness in General Cosmological Scenarios
    William Kinney (Univ. at Buffalo, SUNY)
    14/09/2026 14:45

    The well-known Borde-Guth-Vilenkin Theorem shows that inflationary
    spacetimes are generically geodesically past-incomplete, necessitating
    the existence of a pre-inflationary boundary of some sort, possibly
    singular. In this talk, I discuss the generalization of the BGV theorem
    to spactimes beyond inflation, including inhomogeneous and cyclic
    models. I argue that the cyclic model proposed...

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  7. 33. Non-compact QCD axion and its gravitational origin
    Prof. Mikhail Shaposhnikov (EPFL)
    14/09/2026 16:00
  8. 34. Primordial lepton asymmetries: constraints and consequences
    Julien Froustey (IFIC, CSIC-UV)
    14/09/2026 16:45
  9. 47. Welcome
    15/09/2026 09:50
  10. 38. Neutrino mass and gravitational waves from RG fixed points
    Kamila Kowalska (National Centre for Nuclear Research)
    15/09/2026 10:00
  11. 39. Gravitational Waves from Strongly Supercooled Cosmological Phase Transitions
    Marek Lewicki (University of Warsaw & AstroCeNT)
    15/09/2026 10:30
  12. 41. (Gravitational) Ultra-relativistic freeze-out during reheating
    Mathieu Gross (IJCLab)
    15/09/2026 11:30
  13. 40. Discussion of the LZ event
    Juri Smirnov (University of Liverpool), Pedro Schwaller (Mainz University)
    15/09/2026 12:00
  14. 35. TBA: astrophysical and other implications
    Zurab Berezhiani (University of Aquila)
    15/09/2026 14:00
  15. 36. Gravitational Waves from Primordial Black Hole Reheating
    Yann GOUTTENOIRE (IAP)
    15/09/2026 14:30

    I will present the 13 channels of gravitational wave production which are at play when the universe is reheated from the evaporation of a population of primordial black holes dominating the energy density of the universe

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  16. 37. Coupled Dark Energy and Dark Matter for DESI: An Effective Guide to the Phantom Divide
    Stephen King
    15/09/2026 15:00
  17. 42. Thermalization Process during Reheating and Gravitational Waves
    Kyohei Mukaida
    15/09/2026 16:00
  18. 43. Stabilizing dark matter with quantum scale symmetry
    Enrico Maria Sessolo (National Centre for Nuclear Research, Warsaw)
    15/09/2026 16:30
  19. 6. Searching for Primordial Features in the Cosmic Microwave Background
    Matteo Braglia (CERN)
    16/09/2026 10:00

    eviations from slow-roll can leave characteristic oscillatory imprints in the spectrum of primordial perturbations, known as primordial features. If detected, such signals could reveal new energy scales during inflation or provide evidence for additional massive degrees of freedom. In this talk, I will review what we can learn from primordial features, discuss the hints currently present in...

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  20. 7. Axion inflation with gauge fields: backreaction and signatures
    Marco Peloso (University of Padua and INFN, Sezione di Padova)
    16/09/2026 10:30
  21. 8. A unique coupling of the massive spin-2 field to supergravity
    Emilian Dudas (CPTHE (Ecole polytechnique))
    16/09/2026 11:30
  22. 9. Nouvelle Cuisine
    Matthew Mccullough (CERN)
    16/09/2026 12:00
  23. 10. Constraining Dissipative Inflation with Open Effective Field Theories
    Thomas Colas (DAMTP - University of Cambridge)
    16/09/2026 14:00
  24. 11. Primordial black hole formation from self-resonant preheating in single-field inflation?
    Pasquale SERPICO (LAPTh)
    16/09/2026 14:30
  25. 12. Microcausality and the Cosmological Collider
    David Stefanyszyn (University of Nottingham)
    16/09/2026 15:00
  26. 13. Supercooled cosmological phase transitions: precise predictions and particle production
    Bogumiła Świeżewska (University of Warsaw)
    16/09/2026 16:00
  27. 14. New probes of supercool phase transitions and domain walls at PTA frequencies
    Pedro Schwaller (Mainz University)
    16/09/2026 16:30
  28. 45. Reception in the Polish Embassy
    16/09/2026 19:45
  29. 15. QCD-driven Warm Inflation: A testable mechanism to set the Hot Big Bang initial conditions
    Marco Drewes (UCLouvain)
    17/09/2026 10:00
  30. 16. Gravitational production of Sterile Neutrinos
    Fotis Koutroulis (IHEP, Beijing)
    17/09/2026 10:30
  31. 17. A Stochastic Gravitational Wave Background
    Prof. Ruth Durrer (Université de Genève, DPT)
    17/09/2026 11:30

    Gravitational waves (GWs) have a very weak absorption cross section. This makes them difficult to observe on the one hand, but it is also for this reason they carry pristine information from their generation mechanism. Their observation may allow glimpses back to the highest redshifts and energies in the Universe.

    After a brief introduction to the significance of the observation of a...

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  32. 18. Cosmology with LISA and related Figures of Merit
    Chiara Caprini (CERN and University of Geneva)
    17/09/2026 12:00
  33. 19. A Laplace-space approach to cosmological correlators
    Sébastien RENAUX-PETEL (IAP - CNRS)
    17/09/2026 14:00
  34. 20. Modelling Ultra-Slow-Roll Inflation
    David Wands (University of Portsmouth)
    17/09/2026 14:30
  35. 21. One-loop freezing of the primordial curvature perturbation
    Lucas PINOL (CNRS, LPENS)
    17/09/2026 15:00
  36. 22. Seesaw cosmology
    Nicolás Bernal (New York University Abu Dhabi)
    17/09/2026 16:00
  37. 23. Self-interacting dark matter: non-perturbative dynamics
    Ayuki Kamada (University of Warsaw)
    17/09/2026 16:30
  38. 44. New dark matter signals from semiannihilation
    Alejandro Ibarra (Technical University of Munich)
    17/09/2026 17:00
  39. 24. A review of pheno constraints on EWBAU models
    Marta Losada (NYU Abu Dhabi)
    18/09/2026 09:30
  40. 25. Testing α-attractor models of inflation by CMB and reheating temperature
    Marek Olechowski (University of Warsaw)
    18/09/2026 10:00
  41. 26. Freeze-In Composite Dark Matter
    Kazuki Sakurai (University of Warsaw)
    18/09/2026 10:30
  42. 27. Unveiling the Dark Ages
    JOE Silk (IAP/JHU)
    18/09/2026 11:30
  43. 28. Cosmological correlators beyond the symmetric lamppost
    Xi Tong (DAMTP, University of Cambridge)
    18/09/2026 12:00
  44. 29. Quantum and classical fluctuations in inflation
    Guillermo Ballesteros (University of Madrid)
    18/09/2026 12:30