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X-ORIGINAL-URL:https://www.lapth.cnrs.fr
X-WR-CALDESC:Évènements pour LAPTh
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TZID:Europe/Paris
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220503T110000
DTEND;TZID=Europe/Paris:20220503T120000
DTSTAMP:20260404T000048
CREATED:20220620T162948Z
LAST-MODIFIED:20220620T162948Z
UID:7795-1651575600-1651579200@www.lapth.cnrs.fr
SUMMARY:[Journal Club] Right-handed neutrinos\, TeV scale BSM neutral Higgs boson\, and FIMP dark matter in an EFT framework
DESCRIPTION:Abstract: \nWe consider an effective field theory framework with three Standard Model (SM) gauge singlet right-handed neutrinos and an additional SM gauge singlet scalar field. The framework generates eV masses of light neutrinos via the seesaw mechanism and accommodates a feebly interacting massive particle (FIMP) as a dark matter candidate.  \nTwo of the gauge singlet neutrinos participate in neutrino mass generation\, while the third gauge singlet neutrino is a FIMP dark matter. We explore the correlation between the vev (vacuum expectation value) of the gauge singlet scalar field which translates as the mass of the BSM Higgs\, and the mass of dark matter\, which arises due to the relic density constraint. We perform a collider analysis to explore the discovery prospect of the TeV scale\, BSM Higgs\, through its difatjet signature\, at a future pp collider\, FCC-hh. \n 
URL:https://www.lapth.cnrs.fr/event/journal-club-right-handed-neutrinos-tev-scale-bsm-neutral-higgs-boson-and-fimp-dark-matter-in-an-eft-framework/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220510T110000
DTEND;TZID=Europe/Paris:20220510T120000
DTSTAMP:20260404T000048
CREATED:20220620T162951Z
LAST-MODIFIED:20220620T162951Z
UID:7801-1652180400-1652184000@www.lapth.cnrs.fr
SUMMARY:[Journal Club] Absorption or Emission of Solitons
DESCRIPTION:Abstract: \n 
URL:https://www.lapth.cnrs.fr/event/journal-club-absorption-or-emission-of-solitons/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220512T110000
DTEND;TZID=Europe/Paris:20220512T120000
DTSTAMP:20260404T000048
CREATED:20220620T163009Z
LAST-MODIFIED:20220620T163009Z
UID:7853-1652353200-1652356800@www.lapth.cnrs.fr
SUMMARY:CMB\, LSS and the distance ladder: cosmic discordance? [Remote talk]
DESCRIPTION:The Lambda-cold-dark-matter (LCDM) model has established itself as a fantastic (yet parametric)  concordance model able to adjust a wide variety of cosmological observables — CMB\, BBN\, Large Scale Structure (LSS) & SN1a most notably.  However as the precision of the data has increased over the past few years\, a number of predictions of the LCDM model are challenged by recent observations.\nFirst and foremost\, the infamous ‘Hubble tension’ is a strong mismatch between the value of the Hubble constant measured using the classical distance ladder method and that inferred from the ΛCDM model. Second\, the ‘S8 tension’ is a longstanding discrepancy between the determination of the amplitude of matter fluctuations on a 8 Mpc/h scale by galaxy (weak lensing) surveys and its prediction within the LCDM model.  \nAfter a brief review of the various measurements (and some potential short-comings)\, I will discuss potential implications that such measurements could have. I will argue that current data favor the possibility that our Universe has undergone anomalous expansion just before recombination and present an overview of the most promising models (early dark energy\, additional dark radiation component and new neutrino properties)\, and their current limitations. I will present guidelines to resolve these tensions simultaneously and suggest what it might take to establish a new `concordance model’ beyond LCDM.
URL:https://www.lapth.cnrs.fr/event/cmb-lss-and-the-distance-ladder-cosmic-discordance-remote-talk/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220518T160000
DTEND;TZID=Europe/Paris:20220518T170000
DTSTAMP:20260404T000048
CREATED:20220620T163002Z
LAST-MODIFIED:20220620T163002Z
UID:7829-1652889600-1652893200@www.lapth.cnrs.fr
SUMMARY:The Tadpole Problem [Remote talk]
DESCRIPTION:I will discuss string theory compactifications where a large number of moduli is stabilized by fluxes. I will first present a conjecture which rules out the stabilization of all complex-structure moduli in F-theory at a generic point in moduli space by fluxes that satisfy the tadpole cancellation condition. Evidence for this conjecture comes from studying K3xK3 compactifications using evolutionary algorithms.  \nSubsequently\, I will discuss obstructions on flux compactifications coming from AdS/CFT holography. Here\, I will argue that it is not possible to obtain KKLT-like AdS vacua with very small cosmological constants by putting a bound on the central charge of the dual theory. These results have important consequences for the construction of de Sitter vacua in string theory.
URL:https://www.lapth.cnrs.fr/event/the-tadpole-problem-remote-talk/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220519T080000
DTEND;TZID=Europe/Paris:20220519T200000
DTSTAMP:20260404T000048
CREATED:20220620T162957Z
LAST-MODIFIED:20220620T162957Z
UID:7815-1652947200-1652990400@www.lapth.cnrs.fr
SUMMARY:AnLy Strings & Fields 2nd in-person Meeting
DESCRIPTION:This is a meeting on topics related to string and field theory\, between members of nearby institutions: \n\n\nIP2I (CNRS\, UCBL)\, Lyon \n\n\nLAPTh (CNRS\, USMB)\, Annecy \n\n\nLPENSL (CNRS\, ENSL)\, Lyon \n\n\nMore information can be found on the AnLy webpage. \nFor this second edition\, the meeting will take place in IP2I\, Lyon\, on the 19/05/22. Talks will happen in room 429 (4th floor) and salle des réunions (3rd floor). \n  \nTravel \nOptions between Lyon and Annecy are train (or train + bus)\, Flixbus\, or car (and car-sharing). \nInformation on how to access the IP2I can be found on this page. \n  \nLunch \nSeveral lunch options are possible close to the IP2I (canteen\, restaurant\, etc.). \n  \nInternet \nEduroam is available at the IP2I. \n 
URL:https://www.lapth.cnrs.fr/event/anly-strings-fields-2nd-in-person-meeting/
CATEGORIES:Upcoming Workshops
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220524T104500
DTEND;TZID=Europe/Paris:20220524T110000
DTSTAMP:20260404T000048
CREATED:20220620T163002Z
LAST-MODIFIED:20220620T163002Z
UID:7830-1653389100-1653390000@www.lapth.cnrs.fr
SUMMARY:Presentation stagiaires suite
DESCRIPTION:
URL:https://www.lapth.cnrs.fr/event/presentation-stagiaires-suite/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220524T110000
DTEND;TZID=Europe/Paris:20220524T120000
DTSTAMP:20260404T000048
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/event/three-dimensional-flux-vacua-from-type-ii-supergravities/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220531T110000
DTEND;TZID=Europe/Paris:20220531T120000
DTSTAMP:20260404T000048
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/event/journal-club-a-fundamental-plane-relation-for-the-gamma-ray-luminosity-of-pulsars/
CATEGORIES:Upcoming Journal Club
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