Speakers: Claudio Toni We study the implications of the observed excess at Belle-II under the assumption of Rank-One Flavour Violation, i.e. that New Physics couples to a single specific direction in flavour space. By varying this direction we perform analyses at the level of the low-energy EFT, the SMEFT, and with explicit mediators such as […]
Speakers: Marco Bonici (INAF-IASF Milano) The analysis of galaxy clustering measurements from surveys like Euclid or DESI is likely to be affected by the so-called projection effects, which causes the 1D marginals of the analysis to not contain the bestfit; this is a serious issue which can potentially harm the cosmological interpretation of these analyses. […]
Speakers: Richard Taillet (Université de Savoie/LAPTH) L'hypothèse d'un univers héliocentrique formulée par Nicolas Copernic en 1543, en opposition au modèle géocentrique dit « de Ptolémée » et en vigueur depuis plus d’un millénaire, marque un tournant majeur dans notre conception du monde, au point que l’expression « révolution copernicienne » est entrée dans le langage […]
Speakers: Zucheng Gao Parity-violating has been found in the weak interactions. In cosmology, certain inflation mechanism can also introduce parity-violating imprints on the primordial fluctuations. Here we present theoretically how the parity-violating signature enters large-scale structure (LSS), based on Eulerian perturbation theory (EPT). We develop an effective estimator to extract parity-violating information from LSS. We […]
Speakers: Daniele Oriti (Universidad Complutense de Madrid) . Abstract: We show how a cosmological dynamics with a late-time cosmic acceleration and an asymptotic deSitter regime can be obtained from hydrodynamics on minisuperspace, a framework generalising quantum cosmology with non-linear terms. We also show how this hydrodynamics framework can be derived from fundamental quantum gravity models within […]
Speakers: Clément Delcamp (IHES) Defining internal symmetry in a quantum theory through the lens of topological defects has opened the door to generalised notions of symmetry. In this seminar, I will introduce such generalisations and sketch the relevant mathematical framework, before presenting explicit examples in quantum lattice models. https://indico.in2p3.fr/event/35727/
Speakers: Jiamin HOU (Max Planck Institute for Extraterrestrial Physics (MPE)) Galaxy N-point function statistics provide a powerful tool for extracting non-Gaussian information. To efficiently compute N-point functions, various approaches have been proposed, including radial-angular decomposition in harmonic space and compressed statistics. In particular, the statistics involving four fields can be designed to be an effective […]
Speakers: Yann Gouttenoire (Tel Aviv University) Abstract: In order to explain the large amplitude of the nano-Hertz stochastic gravitational wave background observed in pulsar timing arrays (PTA), primordial sources must be particularly energetic. This is correlated to the generation of large density fluctuations, later collapsing into ultra-compact mini-halo (UCMHs). We demonstrate that if dark matter […]
Le LAPP et le LAPTh reçoivent à Annecy la section 29 du CNU pour la session de printemps 2025. Logements: Nous recommandons les logements situés à proximité de la ligne […]
Speakers: Stanislav Pakuliak Algebraic Bethe ansatz is reviewed on example of the ferromagnetic spin-chain XXX Heisenberg model.The monodromy matrix action to the off-shell Bethe vectorsis explained and the coproduct property […]
Speakers: Gabriele Casagrande (Ecole Polytechnique) . Abstract: Link: Zoom AnLy: https://sites.google.com/view/anlystringsandfields https://indico.in2p3.fr/event/36236/
Speakers: Zvonomir Vlah (Ruđer Bošković Institute and University of Cambridge) I will discuss recent developments in cosmological perturbation theory and the effective field theory (EFT) of large-scale structure. Current galaxy […]