BEGIN:VCALENDAR VERSION:2.0 PRODID:-//LAPTh - ECPv6.15.17//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:LAPTh X-ORIGINAL-URL:https://www.lapth.cnrs.fr/en/ X-WR-CALDESC:Events for LAPTh REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:Africa/Abidjan BEGIN:STANDARD TZOFFSETFROM:+0000 TZOFFSETTO:+0000 TZNAME:GMT DTSTART:20230101T000000 END:STANDARD END:VTIMEZONE BEGIN:VTIMEZONE TZID:UTC BEGIN:STANDARD TZOFFSETFROM:+0000 TZOFFSETTO:+0000 TZNAME:UTC DTSTART:20220101T000000 END:STANDARD END:VTIMEZONE BEGIN:VTIMEZONE TZID:Europe/Paris BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20210328T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20211031T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20220327T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20221030T010000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:+0100 TZOFFSETTO:+0200 TZNAME:CEST DTSTART:20230326T010000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:+0200 TZOFFSETTO:+0100 TZNAME:CET DTSTART:20231029T010000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=Africa/Abidjan:20240326T100000 DTEND;TZID=Africa/Abidjan:20240326T110000 DTSTAMP:20260408T055918 CREATED:20240326T145424Z LAST-MODIFIED:20240326T145424Z UID:8322-1711447200-1711450800@www.lapth.cnrs.fr SUMMARY:Locality and symmetry for T-Tbar and gravity DESCRIPTION:Speakers: Ruben Monten (Cern) \nHolography appears to be a fundamental property of gravity. However\, even in well-established models like AdS/CFT\, the compatibility of this principle with the locality properties of the gravitational physics we observe remains to be completely understood. We can make progress in less than four spacetime dimensions by using special properties of the so-called T-Tbar operator in the CFT. I will discuss how the symmetries and preserved integrability structure provide an important handle on the properties of T-Tbar deformed CFTs. On the gravitational side\, the relevant physics is that of the boundary modes of the metric\, which implement the Brown–Henneaux charges. I will show how this reproduces the T-Tbar deformed field theory result and how similar techniques can be applied to asymptotically flat space to derive\, among others\, soft theorems for scattering amplitudes. \nhttps://indico.in2p3.fr/event/32400/ URL:https://www.lapth.cnrs.fr/en/event/locality-and-symmetry-for-t-tbar-and-gravity/ LOCATION:Auditorium (LAPTh) END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230706T090000 DTEND;TZID=UTC:20230706T100000 DTSTAMP:20260408T055918 CREATED:20230509T132145Z LAST-MODIFIED:20230509T132145Z UID:8226-1688634000-1688637600@www.lapth.cnrs.fr SUMMARY:Julien Gaboriaud DESCRIPTION:  \nhttps://indico.in2p3.fr/event/29995/ URL:https://www.lapth.cnrs.fr/en/event/julien-gaboriaud/ LOCATION:Auditorium (LAPTh) CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230629T090000 DTEND;TZID=UTC:20230629T100000 DTSTAMP:20260408T055918 CREATED:20230509T132144Z LAST-MODIFIED:20230509T132144Z UID:8225-1688029200-1688032800@www.lapth.cnrs.fr SUMMARY:Julien Barrat DESCRIPTION:  \nhttps://indico.in2p3.fr/event/28967/ URL:https://www.lapth.cnrs.fr/en/event/julien-barrat/ LOCATION:Auditorium (LAPTh) CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230627T090000 DTEND;TZID=UTC:20230627T100000 DTSTAMP:20260408T055918 CREATED:20230509T132143Z LAST-MODIFIED:20230509T132143Z UID:8224-1687856400-1687860000@www.lapth.cnrs.fr SUMMARY:[Journal Club] George Tringas DESCRIPTION:Speakers: George Tringas \n Abstract:  \nhttps://indico.in2p3.fr/event/29783/ URL:https://www.lapth.cnrs.fr/en/event/journal-club-george-tringas/ LOCATION:Petit Amphi (LAPTh) CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230622T090000 DTEND;TZID=UTC:20230622T100000 DTSTAMP:20260408T055918 CREATED:20230509T132142Z LAST-MODIFIED:20230509T132142Z UID:8223-1687424400-1687428000@www.lapth.cnrs.fr SUMMARY:Timm Wrase DESCRIPTION:  \nhttps://indico.in2p3.fr/event/29705/ URL:https://www.lapth.cnrs.fr/en/event/timm-wrase/ LOCATION:Petit Amphi (LAPTh) CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230612T130000 DTEND;TZID=UTC:20230630T160000 DTSTAMP:20260408T055918 CREATED:20230509T132141Z LAST-MODIFIED:20230509T132141Z UID:8222-1686574800-1688140800@www.lapth.cnrs.fr SUMMARY:Physics at TeV Colliders and Beyond the Standard Model | PhysTeV 2023 DESCRIPTION:The “PhysTeV” series of workshops aims at pushing the frontier of fundamental Physics by bringing together theorists and experimentalists working on several aspects of phenomenology at TeV colliders and other experiments.World experts are brought together to address fundamental problems raised notably by the Higgs boson discovery\, dark matter and the disappearance of antimatter in the Universe\, and to develop new techniques and original strategies to discover signals of new Physics at TeV-scale particle colliders and other experiments\, as\, for instance\, precision low-energy experiments.The main theme of the 2023 edition will be                         “Intensify the search for new Physics”.Further details available also here: https://phystev.cnrs.fr/Registration will close on 26 March 2023. Registration deadline: extended until 2 April 2023.   \n Session 1: 12 – 21 June 2023 \n Higgs Physics (SM aspects) \n Theory \n Experiment \n S. Jones\, IPPP\, Durham University\, UK \n R. Röntsch\, University of Milan\, Italy \n M. Donegà\, ETH Zurich\, Switzerland [CMS] \n K. Köneke\, University of Freiburg\, Germany [ATLAS] \n Standard Model Phenomenology \n Theory \n Experiment \n Techniques\, calculations\, and phenomenology \n A. Huss\, CERN\, Switzerland \n M. Pellen\, University of Freiburg\, Germany \n P. Azzurri\, INFN Pisa\, Italy [CMS] \n J. Huston\, Michigan State University\, USA​ [ATLAS] \n Jet substructure techniques \n S. Marzani\, University of Genova\, Italy \n A. Hinzmann\, University of Hamburg\, Germany [CMS] \n Monte Carlo generators\, Tools\, Machine-Learning \n Theory \n Experiment \n S. Höche\, FNAL\, USA \n S. Plätzer\, University of Vienna and Graz\, Austria \n MC: J. McFayden\, University of Sussex\, UK [ATLAS] \n ML: V. Mikuni\, NERSC\, Berkeley\, USA \n   \n Session 2: 21 – 30 June 2023 \n Higgs Physics (BSM aspects) \n Theory \n Experiment \n R.T. D’Agnolo\, IPhT Saclay\, France \n A. De Wit\, University of Zurich\, Switzerland [CMS] \n BSM Phenomenology at colliders \n Theory \n Experiment \n J. Zupan (TBC)\, Cincinnati University\, USA \n T. Vazquez-Schroeder\, CERN\, Switzerland [ATLAS] \n High-precision low-energy probes \n Theory \n Experiment \n E. Fuchs\, CERN and University of Hannover\, Germany \n J. Berengut\, University of New South Wales\, Australia \n TBA \n Monte Carlo generators\, Tools\, Machine-Learning \n Theory \n Experiment \n G. Durieux\, CERN\, Switzerland \n A. Wulzer\, University of Padua\, Italy \n G. Kasieczka\, University of Hamburg\, Germany [CMS] \n   \nhttps://indico.in2p3.fr/event/28537/ URL:https://www.lapth.cnrs.fr/en/event/physics-at-tev-colliders-and-beyond-the-standard-model-phystev-2023/ LOCATION:Ecole de Physique des Houches CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230601T090000 DTEND;TZID=UTC:20230601T100000 DTSTAMP:20260408T055918 CREATED:20230509T132139Z LAST-MODIFIED:20230509T132139Z UID:8220-1685610000-1685613600@www.lapth.cnrs.fr SUMMARY:Sreemanti Chakraborti DESCRIPTION:  \nhttps://indico.in2p3.fr/event/29661/ URL:https://www.lapth.cnrs.fr/en/event/sreemanti-chakraborti/ LOCATION:Auditorium (LAPTh) CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230531T140000 DTEND;TZID=UTC:20230531T150000 DTSTAMP:20260408T055918 CREATED:20230509T132139Z LAST-MODIFIED:20230509T132139Z UID:8219-1685541600-1685545200@www.lapth.cnrs.fr SUMMARY:[AnLy] Solving 3d Gravity with Virasoro TQFT DESCRIPTION:Speakers: Lorenz Eberhardt (Princeton\, IAS) \nAbstract: I will explain a proposal which relates three-dimensional quantum gravity in AdS3 to a particular 3d TQFT that we refer to as “Virasoro TQFT’’. This relation gives a precise meaning to the standard folklore that pure 3d gravity is related to two copies of SL(2\,R) Chern-Simons theory. I will discuss that replacing SL(2\,R) Chern-Simons theory by Virasoro TQFT solves several known problems in the correspondence. The relation provides a computationally useful tool to study partition functions of 3d gravity. The talk is based on work with Scott Collier and Mengyang Zhang.Link: ZoomAnLy: https://sites.google.com/view/anlystringsandfields   \nhttps://indico.in2p3.fr/event/30080/ URL:https://www.lapth.cnrs.fr/en/event/anly-solving-3d-gravity-with-virasoro-tqft/ LOCATION:Online seminar CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230530T090000 DTEND;TZID=UTC:20230530T100000 DTSTAMP:20260408T055918 CREATED:20230509T132138Z LAST-MODIFIED:20230509T132138Z UID:8218-1685437200-1685440800@www.lapth.cnrs.fr SUMMARY:[Journal Club] Pasquale Serpico DESCRIPTION:Speakers: Pasquale Serpico (LAPTh\, Annecy-le-vieux) \n Abstract:  \nhttps://indico.in2p3.fr/event/29749/ URL:https://www.lapth.cnrs.fr/en/event/journal-club-pasquale-serpico/ LOCATION:Petit Amphi (LAPTh) CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230523T100000 DTEND;TZID=UTC:20230525T150000 DTSTAMP:20260408T055918 CREATED:20230509T132136Z LAST-MODIFIED:20230509T132136Z UID:8216-1684836000-1685026800@www.lapth.cnrs.fr SUMMARY:French Strings Meeting 2023 DESCRIPTION:This meeting will gather the France-based community working in string and quantum field theory for three days of scientific exchanges on current developments in these research areas. The workshop will take place at LAPTh\, Annecy\, from Tuesday 23rd May at 2pm till Thursday 25th at around 2pm. The detailed program can be found here. Talks are by invitation. Review talks will be given by:Yifei He (LPENS\, Paris)Severin Lüst (L2C\, Montpellier)Eric Perlmutter (IPhT\, Saclay)Speakers list:Nejc Ceplak (IPhT\, Saclay)Yegor Goncharov (IDP\, Tours)Nafiz Ishtiaque (IHES\, Bures-sur-Yvette)Taro Kimura (IMB\, Dijon)Bruno Le Floch (LPTHE\, Paris)Sucheta Majumdar (LPENS\, Lyon)Paul Marconnet (IP2I\, Lyon)Blagoje Oblak (CPhT\, Palaiseau)Valentin Reys (IPhT\, Saclay)Mikel Sanchez-Garitaonandia (CPhT\, Palaiseau)George Tringas (LAPTh\, Annecy)Alexander Tumanov (LPENS\, Paris)This meeting is an activity of IRN:QFS\, the International Research Network on Quantum Fields and Strings. Previous editions of similar workshops include:French kick-off meeting of IRN:QFS (Tours\, 2021)Théorie des Cordes en France (Paris\, 2015) Registration:  can be done here. It will close on April 23rd. In case of high attendance\, preference will be given to the members of institutes covered by the network IRN:QFS in France. Accommodation:  will be covered by the IRN:QFS network for 2 nights (23-25/05)\, in the limit of 50 participants. The hotel is Best Western International\, 19 avenue du Rhône\, Annecy. Travel: Annecy can be reached by train (SNCF)\, bus (Flixbus) or car (including car-sharing Blablacar). Detailed information on how to access the LAPTh can be found on this page. Buses connecting the station and the LAPTh are indicated. Travel costs are to be covered by participants. Lunch and Dinner: Lunches\, as well as a workshop dinner\, will be offered. Lunches will be provided at LAPTh. The workshop dinner will take place at the Brasserie de l’Impérial. To reach the dinner restaurant as a group\, we will leave LAPTh and catch the Bus 1 at Campus\, stop at Montremont and walk along Avenue de France. Organizing Committee:  David Andriot\, Benjamin Basso\, Xavier Bekaert\, Dmitrii Chicherin\, Laurent Gallot\, Ruben Minasian\, Boris Pioline\, Andrea Puhm\, Henning Samtleben\, Piotr Tourkine. Funding: IRN:QFS\, LAPTh\, FRIF\, CPTGA \nhttps://indico.in2p3.fr/event/28620/ URL:https://www.lapth.cnrs.fr/en/event/french-strings-meeting-2023/ LOCATION:LAPTh CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230517T140000 DTEND;TZID=UTC:20230517T150000 DTSTAMP:20260408T055918 CREATED:20230509T132135Z LAST-MODIFIED:20230509T132135Z UID:8214-1684332000-1684335600@www.lapth.cnrs.fr SUMMARY:[AnLy] Gerben Venken DESCRIPTION:Speakers: Gerben Venken (U. Heidelberg) \n Abstract: Link: ZoomAnLy: https://sites.google.com/view/anlystringsandfields   \nhttps://indico.in2p3.fr/event/29869/ URL:https://www.lapth.cnrs.fr/en/event/anly-gerben-venken/ LOCATION:Online seminar CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230516T120000 DTEND;TZID=UTC:20230516T130000 DTSTAMP:20260408T055918 CREATED:20230509T132134Z LAST-MODIFIED:20230509T132134Z UID:8212-1684238400-1684242000@www.lapth.cnrs.fr SUMMARY:Entanglement and separability of Rokhsar-Kivelson and resonating valence-bond states DESCRIPTION:Speakers: Gilles Parez (CRM\, Montréal) \nEntanglement and separability are two opposite yet intertwined notions in quantum mechanics. A quantum state is said to be entangled if it is not separable\, and vice versa. Quantifying how entangled two subsystems are remains a challenging problem\, which has led to important insights in the context of quantum many-body systems. In this talk\, I will discuss entanglement and separability of dimer Rokhsar-Kivelson (RK) states and resonating valence-bond (RVB) states. For dimer RK states on general tilable graphs\, we prove the exact separability of the reduced density matrix of two or more disconnected subsystems\, implying the absence of entanglement between the subsystems. For RVB states\, we show separability for disconnected systems up to exponentially small terms in the distance d between the subsystems. We argue that separability does hold in the scaling limit\, even for arbitrarily small ratio d/L\, where L is the characteristic size of the subsystems. Our results hold irrespective of the underlying graph (which include square and triangular lattices)\, and hence suggest that separability (up to exponentially small terms) between disjoint regions is a universal feature of RVB states. In the case of adjacent subsystems for the RK states\, we derive exact results for the logarithmic negativity in terms of partition functions of the underlying statistical model\, and recover the known result for the Rényi-1/2 entropy in the limit of complementary subsystems. \nhttps://indico.in2p3.fr/event/29487/ URL:https://www.lapth.cnrs.fr/en/event/entanglement-and-separability-of-rokhsar-kivelson-and-resonating-valence-bond-states/ LOCATION:Auditorium (LAPTh) CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230511T090000 DTEND;TZID=UTC:20230511T100000 DTSTAMP:20260408T055918 CREATED:20230509T132133Z LAST-MODIFIED:20230509T132133Z UID:8211-1683795600-1683799200@www.lapth.cnrs.fr SUMMARY:DM indirect searches with cosmic-ray antiparticles DESCRIPTION:Speakers: Pedro de la Torre Luque (Stockholm University) \nThe creation of antiparticles in the Galaxy has been discussed as a potential signal of exotic production mechanisms such as primordial black hole evaporation or dark matter decay/annihilation\, in addition to the more conventional production from cosmic-ray (CR) interactions. Recent CR detectors have provided very accurate measurements on the spectra of antiprotons and positrons that we use to search for evidence of new physics. In addition\, the exciting first measurements of the flux of anti-nuclei can be achievable in a few years.In this talk\, I discuss the uncertainties related to the modelling of these antiparticles and show state-of-art predictions of their spectra. We will also talk about recent dark matter constraints from antiprotons and positrons and discuss the expected fluxes of anti-deuteron and anti-helium from global analyses of different CR observables in view of the first tentative detection of anti-nuclei events by the AMS-02 collaboration. Finally\, if time allows it\, I will discuss an ongoing study where we use CR data to place constrains of DM candidates beyond WIMPs (e.g. ALPs\, sterile neutrinos\, …) coupling with electrons. \nhttps://indico.in2p3.fr/event/29312/ URL:https://www.lapth.cnrs.fr/en/event/dm-indirect-searches-with-cosmic-ray-antiparticles/ LOCATION:Auditorium (LAPTh) CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=UTC:20230509T090000 DTEND;TZID=UTC:20230509T100000 DTSTAMP:20260408T055918 CREATED:20230509T132132Z LAST-MODIFIED:20230509T132132Z UID:8210-1683622800-1683626400@www.lapth.cnrs.fr SUMMARY:News from the Universe: A Trio of Intriguing Developments in Astrophysics and Cosmology DESCRIPTION:Speakers: Christopher Eckner (CNRS\, LAPTh) \n Abstract:I will present three recent papers advancing our understanding of astrophysics and cosmology. The covered papers are:I)  arXiv:2304.0607: “The Image of the M87 Black Hole Reconstructed with PRIMO”   A crisper image of the supermassive black hole of M87 with machine learningII)  arXiv:2304.09895: “Anomalies in Gravitational-Lensed Images Revealing Einstein Rings Modulated by Wavelike Dark Matter”   Using strong gravitational lensing to discriminate between fuzzy and WIMP-like dark matter III) arXiv:2304.10934: “A Cross-correlation Study between IceCube Neutrino Events and the Fermi Unresolved Gamma-ray Sky”    Where do all the very-high-energy neutrinos detected by IceCube come from?  \nhttps://indico.in2p3.fr/event/29748/ URL:https://www.lapth.cnrs.fr/en/event/news-from-the-universe-a-trio-of-intriguing-developments-in-astrophysics-and-cosmology/ LOCATION:Auditorium (LAPTh) CATEGORIES:Upcoming Journal Club,Upcoming Lectures,Upcoming Seminars,Upcoming Workshops,Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20221014T090000 DTEND;TZID=Europe/Paris:20221014T183000 DTSTAMP:20260408T055918 CREATED:20220620T162958Z LAST-MODIFIED:20220620T163037Z UID:7820-1665738000-1665772200@www.lapth.cnrs.fr SUMMARY:Alpine Strings 2022 DESCRIPTION:This 1-day workshop aims at gathering in Annecy the local string and quantum field theory community for fruitful exchanges on active research topics. Those include: \n\nBootstrap\n \nSwampland program and string phenomenology\nSupergravity and Exceptional Field Theories\n\nParticipating institutions are mainly LPENS (Lyon)\, IP2I (Lyon)\, LAPTh (Annecy)\, CERN (Meyrin)\, UNIGE (Geneva) and EPFL (Lausanne). Young researchers are particularly encouraged to participate. \nA preliminary list of speakers includes: \n\nTBA\n\n  \nTravel \nAnnecy can be reached by train (SNCF\, SBB)\, bus (including B272\, or Flixbus)\, car (including car-sharing Blablacar). \nDetailed information on how to access the LAPTh can be found on this page; in particular\, buses connecting the station and the LAPTh are indicated. \n  \nLunch and dinner \nThere is no lunch option close to the LAPTh (no shop\, canteen\, etc.). A vegetarian lunch can be provided on both days. Please indicate your interest when registering. \nA pizza dinner will be proposed on the 14th October. \n  \nAccomodation \nA hotel for the night 13-14th October will be proposed when registering. \n  \nInternet \nEduroam is available at LAPTh. Another possibility is to get a guest access when you arrive. \n  \n  \nThis workshop is funded thanks to the AAP USMB “Bootstrapping the Swampland”. It is part of the AnLy activities. \nLocal organisers: D. Andriot\, P. Tourkine. URL:https://www.lapth.cnrs.fr/en/event/alpine-strings-2022/ CATEGORIES:Upcoming Workshops END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220908T110000 DTEND;TZID=Europe/Paris:20220908T120000 DTSTAMP:20260408T055918 CREATED:20220620T163000Z LAST-MODIFIED:20220620T163039Z UID:7824-1662634800-1662638400@www.lapth.cnrs.fr SUMMARY:Newtonian regime in a spherical or hyperbolic universe and consequences for the role of spatial curvature in cosmology DESCRIPTION:The standard model of cosmology currently allows for three types of geometries for our Universe (Euclidean\, spherical or hyperbolic)\, each of these types corresponding to a set of different (multiconnected)-topologies. Among these geometries\, Newton’s theory of gravity is only defined on the Euclidean one. Still\, extending the validity of this theory to the two other cases\, with the aim that this should constitute the limit of a relativistic theory of gravity\, could provide a strong theoretical tool to probe large scale effects of global topology. \n  The first part of this presentation will aim at constructing such a theory\, using the concept of Galilean structures. We will see that it allows to quantify the effects of topology on the gravitational potential and structure formation.\n  In the second part\, I will show that Einstein’s equation is necessarily incompatible with such an extension of Newton’s theory. However\, as a physical hypothesis for our Universe\, if we require the Newtonian regime to exist regardless of the global geometry and topology\, then Einstein’s equation should be modified. This can be done by adding a “topological term’’ arising from the introduction of a second non-dynamical metric in the theory. The main consequence of this modification is that the expansion law of a homogeneous and isotropic solution no longer features the spatial curvature (i.e. $Omega = 1\, forall Omega_k$). I will argue that this result gives a simple solution to the flatness problem\, and asks for a reevaluation of the spatial curvature from current cosmological data. URL:https://www.lapth.cnrs.fr/en/event/newtonian-regime-in-a-spherical-or-hyperbolic-universe-and-consequences-for-the-role-of-spatial-curvature-in-cosmology/ CATEGORIES:Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220829T090000 DTEND;TZID=Europe/Paris:20220902T170000 DTSTAMP:20260408T055918 CREATED:20220620T162956Z LAST-MODIFIED:20220620T163037Z UID:7813-1661763600-1662138000@www.lapth.cnrs.fr SUMMARY:RAQIS 22 DESCRIPTION:Recent Advances in Quantum Integrable Systems URL:https://www.lapth.cnrs.fr/en/event/raqis-22/ CATEGORIES:Upcoming Workshops END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220707T110000 DTEND;TZID=Europe/Paris:20220707T120000 DTSTAMP:20260408T055918 CREATED:20220620T163001Z LAST-MODIFIED:20220620T163039Z UID:7825-1657191600-1657195200@www.lapth.cnrs.fr SUMMARY:Presentations doctorants DESCRIPTION: URL:https://www.lapth.cnrs.fr/en/event/presentations-doctorants/ CATEGORIES:Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220630T110000 DTEND;TZID=Europe/Paris:20220630T120000 DTSTAMP:20260408T055918 CREATED:20220620T163001Z LAST-MODIFIED:20220620T163039Z UID:7826-1656586800-1656590400@www.lapth.cnrs.fr SUMMARY:Presentations doctorants DESCRIPTION: URL:https://www.lapth.cnrs.fr/en/event/presentations-doctorants-2/ CATEGORIES:Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220628T110000 DTEND;TZID=Europe/Paris:20220628T120000 DTSTAMP:20260408T055918 CREATED:20220620T162948Z LAST-MODIFIED:20220620T163036Z UID:7796-1656414000-1656417600@www.lapth.cnrs.fr SUMMARY:[Journal Club] Björn Herrmann DESCRIPTION:Abstract: \n  \nZoom link: \nhttps://cnrs.zoom.us/j/91049381574?pwd=TDZyU3NqT0k4MFk3cUMvc0JuOURCdz09 URL:https://www.lapth.cnrs.fr/en/event/journal-club-bjorn-herrmann/ CATEGORIES:Upcoming Journal Club END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220623T110000 DTEND;TZID=Europe/Paris:20220623T120000 DTSTAMP:20260408T055918 CREATED:20220620T163003Z LAST-MODIFIED:20220620T163038Z UID:7831-1655982000-1655985600@www.lapth.cnrs.fr SUMMARY:Star forming galaxies as cosmic ray factories: a multimessenger view DESCRIPTION:Star forming galaxies (SFGs) are powerful factories of high-energy cosmic rays.\nTheir star formation rate (SFR) is a key physical property characterizing both the total energy budget and the transport conditions of such particle populations. Tight correlations are in fact observed between the SFR and the non-thermal radio and gamma-ray luminosity of several SFGs. I will discuss the nature of such correlations focusing on the physical implications on the particle transport.\n \nThe most active SFGs are known as starburst galaxies (SBGs). These objects are unique environments for cosmic rays since they might be able to confine most of their injected particles. Such a calorimetric scenario is of great interest for the production of hadronic byproducts such as non-thermal radiation and high-energy neutrinos.\nI will illustrate the main features and the impact of calorimetry on the spectral energy distribution of these galaxies.\nIn addition\, since SBGs are also inferred to be highly numerous at cosmological distances\, I will discuss their possible contribution to the diffuse fluxes of gamma rays and neutrinos observed by Fermi-LAT and IceCube respectively.\n \nDespite of the extreme conditions expected to be found in the interstellar medium of SBGs\, accelerators of sub-galactic scale\nsuch as supernova remnants or star clusters are unlikely to overcome the PeV range.  \nOn the other hand\, the enhanced rate of supernovae characterizing SBGs can launch powerful winds with bubble structures where particles can be efficiently accelerated at higher energies.\nI will discuss a physical model describing particle acceleration and transport in these galactic wind bubbles.\nFinally\, I will conclude presenting the multi-messenger potential of SBGs and their wind bubbles in terms of gamma rays\, neutrinos and escaping cosmic rays. URL:https://www.lapth.cnrs.fr/en/event/star-forming-galaxies-as-cosmic-ray-factories-a-multimessenger-view/ CATEGORIES:Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220621T110000 DTEND;TZID=Europe/Paris:20220621T120000 DTSTAMP:20260408T055918 CREATED:20220620T162950Z LAST-MODIFIED:20220620T163036Z UID:7799-1655809200-1655812800@www.lapth.cnrs.fr SUMMARY:[Journal Club] Bootstrapping Pions at Large N DESCRIPTION:Abstract: For this journal club meeting I will comment on a recent paper by Albert and Rastelli (https://arxiv.org/abs/2203.11950) in which they apply modern S-matrix bootstrap techniques to the old problem of solving QCD in the large N limit. In particular\, they derive universal bounds for the EFT of massless pions and find that the allowed region for large N theories compatible with unitarity\, causality and analiticity of the S-matrix exhibits a sharp kink\, suggesting the possibility that large N QCD might sit on it in a similar way as the 3D Ising model.\nFinally\, I will make some remarks on the similitudes and differences between this case and that of obtaining bounds for the gravitational S-matrix\, and on the difficulties in extending this ideas to the latter. \n  URL:https://www.lapth.cnrs.fr/en/event/journal-club-bootstrapping-pions-at-large-n/ CATEGORIES:Upcoming Journal Club END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220616T110000 DTEND;TZID=Europe/Paris:20220616T120000 DTSTAMP:20260408T055918 CREATED:20220620T163002Z LAST-MODIFIED:20220620T163002Z UID:7828-1655377200-1655380800@www.lapth.cnrs.fr SUMMARY:Intelligent Explorations of the String Theory Landscape [Remote talk] DESCRIPTION:The goal of identifying the Standard Model of particle physics and its extensions within string theory has been one of the principal driving forces in string phenomenology. Recently\, the incorporation of artificial intelligence in string theory and certain theoretical advancements have brought to light unexpected solutions to mathematical hurdles that have so far hindered progress in this direction. In this talk I will focus on model building efforts in the context of the E8 × E8 heterotic string compactified on smooth Calabi-Yau threefolds and discuss several areas in which machine learning is expected to make a difference. URL:https://www.lapth.cnrs.fr/en/event/intelligent-explorations-of-the-string-theory-landscape-remote-talk/ CATEGORIES:Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220614T110000 DTEND;TZID=Europe/Paris:20220614T120000 DTSTAMP:20260408T055918 CREATED:20220620T162949Z LAST-MODIFIED:20220620T162949Z UID:7797-1655204400-1655208000@www.lapth.cnrs.fr SUMMARY:[Journal Club] A novel theoretical approach to $R(D^{(*)})$ through the Dispersive Matrix method DESCRIPTION:Abstract: \nThe ratios $R(D^{(*)})$ are defined as the $tau/mu$ ratio of the branching fractions of exclusive semileptonic $B to D^{(*)}$ decays. They are a powerful test of Lepton Flavour Universality\, one of the pillars of the SM\, and are determined by the hadronic Form Factors (FFs) describing the $B to D^{(*)}$ decays. Through the novel Dispersive Matrix (DM) approach\, we describe these FFs without assumptions on their functional dependence on the momentum transfer. The DM method is based on the non-perturbative determination of the dispersive bounds due to unitarity and analyticity\, and allows to determine in a model-independent way the FFs in the full kinematical range\, starting from existing Lattice QCD data which are available only at large momentum transfer. Using the unitarity bands of the FFs\, which are thus independent of the experimental determinations of the differential decay widths\, we compute new fully-theoretical expectations of the anomalies. Our results read $R(D) = 0.296(8)$ and $R(D^*) = 0.275(8)$\, each of which is compatible with the corresponding world average of the measurements at the $sim 1.3 sigma$ level. The origin of the discrepancy between the DM estimates and the HFLAV SM predictions will be also discussed. \n  \nZoom link: \nhttps://cnrs.zoom.us/j/91049381574?pwd=TDZyU3NqT0k4MFk3cUMvc0JuOURCdz09 URL:https://www.lapth.cnrs.fr/en/event/journal-club-a-novel-theoretical-approach-to-rd-through-the-dispersive-matrix-method/ CATEGORIES:Upcoming Journal Club END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220613T140000 DTEND;TZID=Europe/Paris:20220613T150000 DTSTAMP:20260408T055918 CREATED:20220620T163009Z LAST-MODIFIED:20220620T163009Z UID:7854-1655128800-1655132400@www.lapth.cnrs.fr SUMMARY:Primordial black holes from supercooled first-order phase transition DESCRIPTION: Cosmological first-order phase transition are said strongly supercooled when the nucleation temperature is much smaller than the critical temperature. They are typical of  potentials which feature nearly scale-invariance\, for which the bounce action decreases only logarithmically with time. The phase transition takes place slowly and the probability distribution of bubble nucleation time is maximally spread. Hubble patches which get percolated later than the average are hotter than the background after reheating and potentially collapse into black holes. We discuss the formation of primordial black hole by supercooled first-order phase transitions and we present two classes of particle physics models predicting such transitions.   URL:https://www.lapth.cnrs.fr/en/event/primordial-black-holes-from-supercooled-first-order-phase-transition/ CATEGORIES:Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220609T110000 DTEND;TZID=Europe/Paris:20220609T120000 DTSTAMP:20260408T055918 CREATED:20220620T163000Z LAST-MODIFIED:20220620T163000Z UID:7823-1654772400-1654776000@www.lapth.cnrs.fr SUMMARY:Higgs alignment and the top quark DESCRIPTION:In 1976\, S. Weinberg and his student\, E. Gildener (GW)\, proposed\nmulti-Higgs models of electroweak symmetry breaking which are clas-\nsically scale-invariant. If this scale invariance is spontaneously broken\,\nthe Higgs boson is the resulting massless dilaton and\, of all the model’s\nscalars\, its couplings to gauge bosons and fermions are exactly as in\nthe one-Higgs-doublet Standard Model of Weinberg’s 1967 “Model of\nLeptons”. That is\, this Higgs boson is aligned. But\, since the clas-\nsical Higgs potential has an infinitely long flat minimum\, there is no\nfixed mass scale — i.e.\, no fixed VEV — at this level and no concrete\nmeaning to this statement.\nThis scale invariance is explicitly broken by the renormalization\nscale Λ in the one-loop approximation of the Coleman-E. Weinberg\neffective potential\, the Higgs boson boson gets mass\, and its VEV\nv is fixed by its relation to Λ. GW assigned its value to be v =\n2−1/4G−1/2\nF = 246 GeV. Now Higgs alignment means something\, but\nis it preserved in one-loop order\, i.e.\, is it natural? And what about\nhigher orders?\nIn this talk\, I will summarize the above in a two-Higgs-doublet\nmodel of the GW mechanism\, emphasizing the surprisingly low masses\nof the model’s BSM Higgs and the role of the top quark in Higgs\nalignment\, update the important experimental consequences of this\nalignment — stressing the futility of most ATLAS and CMS searches\nfor BSM Higgses\, and preview the extension of these results to two-\nloops.\nThis work was started in 2019 with ́Eric Pilon and extended in 2020\nwith Estia Eichten. The two-loop extension is done with Eichten. URL:https://www.lapth.cnrs.fr/en/event/higgs-alignment-and-the-top-quark/ CATEGORIES:Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220602T110000 DTEND;TZID=Europe/Paris:20220602T120000 DTSTAMP:20260408T055918 CREATED:20220620T163002Z LAST-MODIFIED:20220620T163002Z UID:7827-1654167600-1654171200@www.lapth.cnrs.fr SUMMARY:Imprints of axion-like particles in photon spectra from galaxy clusters DESCRIPTION:Modulations of X-ray spectra from extragalactic sources might provide a signature of photons converting into axion-like particles (ALPs) when traversing a region with a large-scale magnetic field. A crucial unknown in these searches is the structure of the magnetic field considered. In this talk I discuss the impact of realistic models of the magnetic field on ALP-photon oscillations. URL:https://www.lapth.cnrs.fr/en/event/imprints-of-axion-like-particles-in-photon-spectra-from-galaxy-clusters/ CATEGORIES:Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220531T110000 DTEND;TZID=Europe/Paris:20220531T120000 DTSTAMP:20260408T055918 CREATED:20220620T162949Z LAST-MODIFIED:20220620T162949Z UID:7798-1653994800-1653998400@www.lapth.cnrs.fr SUMMARY:[Journal Club] A fundamental plane relation for the gamma-ray luminosity of pulsars DESCRIPTION:Abstract: \nhttps://arxiv.org/abs/2203.13276 \nhttps://iopscience.iop.org/article/10.3847/2041-8213/ab3e0a (1904.01765) URL:https://www.lapth.cnrs.fr/en/event/journal-club-a-fundamental-plane-relation-for-the-gamma-ray-luminosity-of-pulsars/ CATEGORIES:Upcoming Journal Club END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220524T110000 DTEND;TZID=Europe/Paris:20220524T120000 DTSTAMP:20260408T055918 CREATED:20220620T163004Z LAST-MODIFIED:20220620T163004Z UID:7835-1653390000-1653393600@www.lapth.cnrs.fr SUMMARY:Three-dimensional flux vacua from Type II supergravities DESCRIPTION:We discuss flux compactifications of Type IIA supergravity on G2 spaces with smeared O2/O6-planes down to three dimensions. We start by presenting the setup of allowed fluxes\, the internal geometry\, the equations of motion and after compactification we achieve N=1 AdS3 vacua with scale that can be parametrically decoupled from the KK modes. The solutions we find are at weak coupling and large volume regime while the moduli are fully stabilized at the classical level. Next\, utilizing the exact equations of motion including varying warp factor and dilaton we evaluate the backreaction of O6-planes. Using the appropriate flux scaling we show that the corrections to the various background fields are subleading when going from smeared to localized sources and we find the distances from the loci where the smeared approximation can be trusted. We discuss the possibility for de Sitter uplift as well as results of similar compactifications in Type IIB on curved internal G2 spaces. URL:https://www.lapth.cnrs.fr/en/event/three-dimensional-flux-vacua-from-type-ii-supergravities/ CATEGORIES:Weekly seminars END:VEVENT BEGIN:VEVENT DTSTART;TZID=Europe/Paris:20220524T104500 DTEND;TZID=Europe/Paris:20220524T110000 DTSTAMP:20260408T055918 CREATED:20220620T163002Z LAST-MODIFIED:20220620T163002Z UID:7830-1653389100-1653390000@www.lapth.cnrs.fr SUMMARY:Presentation stagiaires suite DESCRIPTION: URL:https://www.lapth.cnrs.fr/en/event/presentation-stagiaires-suite/ CATEGORIES:Weekly seminars END:VEVENT END:VCALENDAR