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X-ORIGINAL-URL:https://www.lapth.cnrs.fr/en/
X-WR-CALDESC:Events for LAPTh
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TZID:UTC
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TZOFFSETFROM:+0000
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DTSTART:20240101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20250401T090000
DTEND;TZID=UTC:20250401T100000
DTSTAMP:20260418T165544
CREATED:20250329T122144Z
LAST-MODIFIED:20250401T085209Z
UID:10064-1743498000-1743501600@www.lapth.cnrs.fr
SUMMARY:Implications of $B^+ to K^+  ubar u$ under rank-one flavour violation hypothesis
DESCRIPTION:Speakers: Claudio Toni\nWe 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 leptoquarks and colorless vectors. Among the various mediators\, the scalar leptoquarks $tilde{R}_2$ and $S_1$ offer the best fits of the Belle-II excess\, while being consistent with the other bounds. On the other hand\, colorless vectors are strongly constrained by meson mixing and resonance searches. In all cases we find that a flavour alignment close to the third generation is generically preferred.\nhttps://indico.in2p3.fr/event/36029/
URL:https://www.lapth.cnrs.fr/en/event/implications-of-b-to-k-ubar-u-under-rank-one-flavour-violation-hypothesis/
LOCATION:Salle de Sommets
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250403T090000
DTEND;TZID=UTC:20250403T100000
DTSTAMP:20260418T165544
CREATED:20250213T091651Z
LAST-MODIFIED:20250403T084932Z
UID:9099-1743670800-1743674400@www.lapth.cnrs.fr
SUMMARY:Taming projection effects in EFT of LSS analysis of DESI
DESCRIPTION:Speakers: Marco Bonici (INAF-IASF Milano)\nThe 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. In this talk I will present a few avenues to tackle this issue\, either using simulation-calibrated priors\, a frequentist framework\, or a bayesian reparametrization approach. All of these approaches can significantly reduce the projection effects\, following different strategies.\nSpecifically\, I will show the ongoing application of these methods to current DESI DR1 data\, and will compare the results among them and with the baseline DESI analysis.\nhttps://indico.in2p3.fr/event/35426/
URL:https://www.lapth.cnrs.fr/en/event/marco-bonici/
LOCATION:Auditorium Vivargent (LAPTh)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250404T120000
DTEND;TZID=UTC:20250404T140000
DTSTAMP:20260418T165544
CREATED:20250227T153338Z
LAST-MODIFIED:20250404T131755Z
UID:9277-1743768000-1743775200@www.lapth.cnrs.fr
SUMMARY:L’héliocentrisme selon Copernic
DESCRIPTION:Speakers: Richard Taillet (Université de Savoie/LAPTH)\nL’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 courant. Toutefois\, cet épisode de l’histoire des sciences est souvent présenté d’une manière caricaturale\, qui ne permet pas de saisir pleinement la proposition copernicienne\, avec ses forces et ses faiblesses. Lors de ce séminaire\, destiné à des physiciens et physiciennes\, Richard Taillet tentera de dresser un tableau détaillé du modèle héliocentrique\, des problèmes qu’il avait vocation à résoudre\, des oppositions qu’il a suscitées et des alternatives qui ont été avancées pendant le siècle qui a suivi.\n \nhttps://indico.in2p3.fr/event/35666/
URL:https://www.lapth.cnrs.fr/en/event/copernic-et-lheliocentrisme/
LOCATION:Auditorium Vivargent (LAPP / LAPTh)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250408T090000
DTEND;TZID=UTC:20250408T100000
DTSTAMP:20260418T165544
CREATED:20250329T122145Z
LAST-MODIFIED:20250408T094845Z
UID:10067-1744102800-1744106400@www.lapth.cnrs.fr
SUMMARY:Zucheng Gao - Chasing parity-violating signature in large-scale structure cosmology
DESCRIPTION:Speakers: Zucheng Gao\nParity-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 test this estimator by performing both the theory calculation and the measurement on simulations. We also pin down the obstacles faced by LSS surveys before we can claim a detection of a primordial parity-violating signature.\n \n \nhttps://indico.in2p3.fr/event/36088/
URL:https://www.lapth.cnrs.fr/en/event/zucheng-gao/
LOCATION:Salle de Sommets
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250409T140000
DTEND;TZID=UTC:20250409T150000
DTSTAMP:20260418T165544
CREATED:20250227T153338Z
LAST-MODIFIED:20250409T141641Z
UID:9278-1744207200-1744210800@www.lapth.cnrs.fr
SUMMARY:Daniele Oriti - Late-time cosmic acceleration from Quantum Gravity
DESCRIPTION:Speakers: Daniele Oriti (Universidad Complutense de Madrid)\n.\nAbstract: 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 the tensorial group field theory formalism\, an approach closely related to lattice quantum gravity and loop quantum gravity. If time allows\, we discuss other results within the same framework\, concerning emergent cosmological physics\, as well as other research directions leading to it.\nLink: Zoom\nAnLy: https://sites.google.com/view/anlystringsandfields\n \n \nhttps://indico.in2p3.fr/event/35680/
URL:https://www.lapth.cnrs.fr/en/event/daniele-oriti/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250410T083000
DTEND;TZID=UTC:20250410T093000
DTSTAMP:20260418T165544
CREATED:20250227T153339Z
LAST-MODIFIED:20250410T075054Z
UID:9279-1744273800-1744277400@www.lapth.cnrs.fr
SUMMARY:Introduction to generalised symmetries
DESCRIPTION:Speakers: Clément Delcamp (IHES)\nDefining 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.\nhttps://indico.in2p3.fr/event/35727/
URL:https://www.lapth.cnrs.fr/en/event/clement-delcamp/
LOCATION:Auditorium Vivargent (LAPTh)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250415T090000
DTEND;TZID=UTC:20250415T100000
DTSTAMP:20260418T165544
CREATED:20250214T154950Z
LAST-MODIFIED:20250415T093324Z
UID:9149-1744707600-1744711200@www.lapth.cnrs.fr
SUMMARY:The Fun Side of Galaxy 4-Point Functions
DESCRIPTION:Speakers: Jiamin HOU (Max Planck Institute for Extraterrestrial Physics (MPE))\nGalaxy 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 tool for extracting parity-odd features from the field\, where these odd features may originate from the beyond standard model physics. In this talk\, I will discuss the application of the galaxy four-point function\, the connections between different algorithms involving four fields\, and the potential implications of using the galaxy four-point functions to link late-time and early-time physics.\nhttps://indico.in2p3.fr/event/35591/
URL:https://www.lapth.cnrs.fr/en/event/jiamin-hou/
LOCATION:Auditorium Vivargent (LAPTh)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250417T090000
DTEND;TZID=UTC:20250417T100000
DTSTAMP:20260418T165544
CREATED:20250214T154950Z
LAST-MODIFIED:20250417T093321Z
UID:9148-1744880400-1744884000@www.lapth.cnrs.fr
SUMMARY:WIMPs and New Physics Interpretations of the PTA Signal are Incompatible
DESCRIPTION:Speakers: Yann Gouttenoire (Tel Aviv University)\nAbstract: 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 is made of WIMPs\, then photon and neutrino fluxes from UCMHs produced by curvature peaks\, first-order phase transition and domain wall interpretations of the PTA signal\, exceed current bounds.\nhttps://indico.in2p3.fr/event/35590/
URL:https://www.lapth.cnrs.fr/en/event/yann-gouttenoire/
LOCATION:Auditorium Vivargent (LAPTh)
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