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Progress on Old and New Themes in cosmology (PONT) 2026

from Monday, 27 April 2026 (08:30) to Thursday, 30 April 2026 (20:00)
Palais des papes, Avignon (Chambre du Trésorier)

        : Sessions
    /     : Talks
        : Breaks
27 Apr 2026
28 Apr 2026
29 Apr 2026
30 Apr 2026
AM
08:30 --- Registration ---
09:00
Early Universe - philippe brax (IPhT CEA Saclay) (until 10:45)
09:00 Pontificating about inflation - Lucas Pinol  
09:35 The ACT DR6 Cosmology Results - Adrien LA POSTA  
10:10 The South Pole Telescope: recent results and future prospects - Lennart Balkenhol  
10:45 --- Coffee break ---
11:15
Early Universe - philippe brax (IPhT CEA Saclay) (until 12:25)
11:15 Giving color to the gravitational wave spectrum - Diego Blas (ICREA/IFAE)  
11:50 Cosmology with next generation GW observatories - Archisman Ghosh (Nikhef)  
09:00
Astrophysical messengers of new physics - Marco Cirelli (CNRS LPTHE Jussieu) (until 10:45)
09:00 Cornering axions with astrophysical transients - Edoardo Vitagliano  
09:35 Dynamical probes of dark matter - Julien Lavalle (LUPM (CNRS / Univ. Montpellier))  
10:10 Dark matter direct detection in light of the Large Magellanic Cloud - Nassim Bozorgnia (York University, University of Alberta)  
10:45 --- Coffee break ---
11:15
Astrophysical messengers of new physics - Marco Cirelli (CNRS LPTHE Jussieu) (until 12:25)
11:15 Producing dark matter particles after a first-order phase transition - Felix Kahlhoefer (Karlsruhe Institute of Technology)  
11:50 Mapping out the Dark Matter in the Milky Way with Stars - Lina Necib (MIT)  
09:00
Gravitational Waves - Nicola TAMANINI (L2IT / CNRS) (until 10:45)
09:00 Gravitational Waves from Ultra-light PBHs - Dr Yann Gouttenoire  
09:35 LVK cosmology results from GWTC-4 - Cezary Turski (Ghent University)  
10:10 Gravitational-Wave Lensing in the Wave-Optics Regime: Current Methods and Open Problems - Giulia Cusin  
10:45 --- Coffee break ---
11:15
Gravitational Waves - Nicola TAMANINI (L2IT / CNRS) (until 12:25)
11:15 Baryogenesis: new and old ideas - Valerie Domcke (CERN)  
11:50 Latests Results from the Dark Energy Spectroscopic Instrument - Alexie Leauthaud  
09:00
Late Universe -Dr Vivian Poulin (LUPM, CNRS & U. de Montpellier, France) (until 10:45)
09:00 Cosmic birefringence: a hint of new physics in cosmology and fundamental physics - Patricia Diego Palazuelos (Max Planck Institute for Astrophysics)  
09:35 Status of SN Cosmology in the context of current cosmological tensions - Mickaël RIGAULT (IP2I)  
10:10 Probing the Early Universe with JWST and Euclid - Hakim ATEK (IAP)  
10:45 --- Coffee break ---
11:15
Late Universe -Dr Vivian Poulin (LUPM, CNRS & U. de Montpellier, France) (until 12:25)
11:15 Evolving Dark Energy and the Dark Energy Survey - Marco Raveri  
11:50 Probing fundamental physics with spectroscopic probes of large-scale structure - Azadeh MORADINEZHAD DIZGAH  
PM
12:25 --- Lunch break ---
14:00
Contributed talks - Lucas Pinol (until 16:00)
14:00 Inflation beyond perturbation theory - Sébastien Renaux-Petel  
14:20 de Sitter Momentum Space - Arthur Poisson (IAP)  
14:30 Dual space for cosmological correlators - Nathan Belrhali  
14:40 A superposition quantum universe and its perturbations - Lisa Mickel (Institut d'Astrophysique de Paris (IAP))  
15:00 Cosmological Probes of The Neutrino-DM Portal - Sebastian Trojanowski  
15:20 B-Mesogenesis: The mechanism revisited - Martha Ulloa Calzonzin (University of Florida)  
15:30 Beyond spontaneous baryogenesis with extra fields - Mattia Dubbini (Università di Camerino)  
15:40 Quasi-pole inflation in metric affine gravity - Antonio Racioppi (National Institute of Chemical Physics and Biophysics (EE))  
16:00 --- Coffee break ---
16:30
Contributed talks - Sebastien Renaux (until 18:00)
16:30 Post-inflationary squeezing and the phase coherence of the CMB - Siméon Vareilles  
16:40 Bayesian Optimisation for efficient cosmological model selection and parameter inference - Ameek Malhotra  
17:00 Thermal effects on Dark Matter production during cosmic reheating - Mubarak Mohammed (UCLouvain-CP3)  
17:10 Multimessenger phenomenology of nonperturbative quantum black holes - Prof. Saeed Rastgoo (University of Alberta)  
17:30 Quasi-periodic oscillations as probes of new physics: spin-curvature coupling in neutron star binaries - Gabriele Bianchini (University of Camerino)  
18:30 --- Welcome cocktail ---
12:25 --- Lunch break ---
14:00
Contributed talks - Nassim Bozorgnia (York University, University of Alberta) (until 16:00)
14:00 Cosmological implications of the Gaia Milky Way declining rotation curve. - Alain BLANCHARD  
14:20 Cosmological constraints on dark sectors from CMB and Lyman-alpha - Sonali VERMA (ULB, Brussels)  
14:40 Heating the dark matter halo with dark radiation from supernovae - Stefan Vogl (University of Freiburg)  
15:00 Casimir pressure in the presence of axion dark matter - Ahmad Alachkar (CEA IPHT)  
15:20 Piezoaxionic Detection of Axion Dark Matter with Precessing Nuclear Spins - Baraa YAHYA (IPhT (CEA-SACLAY))  
15:30 Light bosons from cold isolated Neutron Stars - Alessandro Lella  
15:50 Probing Long-Lived Particles with Gravitational Wave Background Spectral Breaks - Angus Spalding (Univeristy of Southampton)  
16:00 --- Coffee break ---
16:30
Contributed talks - Julien Lavalle (LUPM (CNRS / Univ. Montpellier)) (until 18:30)
16:30 Topological Portals to the Dark Sector - Nudžeim Selimović (INFN Padova)  
16:50 Cosmic-ray antinuclei in dark matter searches: Insights from collider data - Jordan Koechler (INFN Turin)  
17:10 Indirect searches for sub-GeV Dark Matter models in present and upcoming observations - Dr Arpan Kar (LPTHE, Sorbonne University, Paris)  
17:30 Probing Galactic dark matter objects from the heating of exoplanetary systems - Théo Paré (LUPM)  
17:40 Hunting invisible particles with the RES-NOVA Observatory - Nahuel Ferreiro Iachellini (University of Milano-Bicocca)  
17:50 Observing Leptogenesis in Action with Gravitational Waves - Jan Schuette Engel (UC Berkeley)  
19:30 --- Public Science Conference ---
12:25 --- Lunch break ---
14:00
Contributed talks - Diego Blas (ICREA/IFAE) (until 16:00)
14:00 First measurement of the Hubble constant from gravitational wave-galaxy cross-correlations - Isabela Santiago de Matos (University of Portsmouth)  
14:20 Cosmology with the Angular Cross-Correlation of Galaxies and Gravitational Waves - Alessandro PEDROTTI  
14:30 Multi-probe Cosmology with Standard Sirens: a GWxHI Cross-correlation Approach - Matteo Schulz  
14:40 A full, high-dimensional sampling scheme for gravitational-wave dark sirens: measuring galaxy weighting and ranking host candidates - Alessandro AGAPITO (Aix-Marseille Université)  
14:50 Resolving structure in the binary black hole mass distribution: implications for population-based cosmology - Vasco GENNARI (L2IT)  
15:00 Spectral sirens cosmology from binary black holes populations with sharper mass features - Tom BERTHEAS (L2IT, LPENS)  
15:10 Gravitational Waves as a Probe of DESI-Motivated Modified Gravity: A Multi-Messenger Forecast - Andrea Cozzumbo (Gran Sasso Science Institute)  
15:20 A universal scaling law for sourced inflationary gravitational waves and applications - Martin Teuscher  
15:30 Quantum production of gravitational waves after inflation - Alina Mierna  
15:40 Unveiling the Central Engine of Core-collapse Supernovae in the Local Universe: Neutron Star or Black Hole? - Maryam Aghaei Abchouyeh  
15:50 A model-independent cosmological test of GR using gravitational wave propagation - Elena Colangeli (ICG - University of Portsmouth)  
16:00 --- Coffee break ---
16:30
Contributed talks - Giulia Cusin (until 18:30)
16:30 Dispersion induced friction in gravitational wave propagation - Dr Charles DALANG (Ecole Normale Supérieure)  
16:50 Cosmology with strong gravitational lenses - Pierre Fleury (CNRS, Laboratoire Univers et Particules de Montpellier)  
17:10 Line of Sight Shear Cosmology - Verification with Hydrosimulated Strong Gravitational Lenses - Giacomo QUEIROLO  
17:20 Gravitational lensing beyond the eikonal approximation - Emma BRUYERE (IAP)  
17:30 Light scalar fields on a curved background and their influence on the dynamics of galaxies. - Lukasz Bunio (University of Manchester)  
17:40 Having Fun with Spherical Collapse: Halo Abundance in Decaying Dark Matter Models - Thomas Montandon (Laboratoire Univers et Particules de Montpellier)  
18:00 Deciphering Coupled Scalar Dark Sectors through the lens of dynamical systems. - Saba Rahimy (Swansea University)  
19:00 --- Banquet ---
12:25 --- Lunch break ---
14:00
Contributed talks - Alain BLANCHARD (until 16:40)
14:00 Dark energy from string theory - Dr David Andriot (LAPTh, CNRS)  
14:20 Interacting dark energy with dark matter entropy couplings - Elsa Teixeira (Laboratoire Univers et Particules de Montpellier, University of Montpellier)  
14:40 INTERPRETABLE MACHINE LEARNING FOR DYNAMICAL DARK ENERGY MODELS - Giulia Borghetto (University of Swansea)  
14:50 The expansion-rate fluctuation from Cosmicflows-4 compared to the standard model of cosmology - Basheer KALBOUNEH  
15:10 Inhomogeneity, anisotropy and axial symmetry with Szekeres cosmological models - Dr Marie-Noëlle Célérier (Observatoire de Paris-PSL)  
15:30 Covariant cosmography in the presence of local structures: comparing exact solutions and perturbation theory - Maharshi SARMA  
15:40 On the origin of dynamical dark energy in cosmographic parameters - Maurice van putten (Sejong University)  
15:50 Measuring cosmic dipole with GRBs - Jessica Santiago  
16:10 CMB status and promises in mid 2026 - Francois BOUCHET  
16:40 --- Farewell coffee ---