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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211025T090000
DTEND;TZID=Europe/Paris:20211026T170000
DTSTAMP:20260504T031704
CREATED:20220620T162958Z
LAST-MODIFIED:20220620T162958Z
UID:7819-1635152400-1635267600@www.lapth.cnrs.fr
SUMMARY:Scalars and potentials
DESCRIPTION:Please see the following website for all information: https://indico.cern.ch/event/888220/ 
URL:https://www.lapth.cnrs.fr/en/event/scalars-and-potentials/
CATEGORIES:Upcoming Workshops
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211021T110000
DTEND;TZID=Europe/Paris:20211021T120000
DTSTAMP:20260504T031704
CREATED:20220620T163007Z
LAST-MODIFIED:20220620T163007Z
UID:7847-1634814000-1634817600@www.lapth.cnrs.fr
SUMMARY:Warm dark matter constraints using indirect searches
DESCRIPTION:Warm dark matter (WDM) could explain some small-scale structure observations that have challenged the cold dark matter (CDM) model\, as warm particles suppress structure formation due to free streaming effects. Observing small-scale structure thus provides a valuable way to distinguish between CDM and WDM. In this talk\, I will present a semi-analytical model for the dark matter substructure evolution. Satellite galaxies form within dark matter subhaloes\, and I will discuss constraints on WDM models based on the observed number of satellites in the Milky Way. Moreover\, warm particles such as sterile neutrinos and axion-like particles can decay into photons\, which are consequently detectable by X-ray telescopes. eROSITA will perform an all-sky X-ray survey\, of which I will present its sensitivity to identify dark matter decay with narrow X-ray line emission.
URL:https://www.lapth.cnrs.fr/en/event/warm-dark-matter-constraints-using-indirect-searches/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211019T110000
DTEND;TZID=Europe/Paris:20211019T120000
DTSTAMP:20260504T031704
CREATED:20220620T162954Z
LAST-MODIFIED:20220620T162954Z
UID:7809-1634641200-1634644800@www.lapth.cnrs.fr
SUMMARY:[Journal Club] Scalar potentials and the de Sitter swampland conjecture
DESCRIPTION:Some content and references can be found in the review 1903.06239 or the introduction of 2004.00030.
URL:https://www.lapth.cnrs.fr/en/event/journal-club-scalar-potentials-and-the-de-sitter-swampland-conjecture/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211014T110000
DTEND;TZID=Europe/Paris:20211014T120000
DTSTAMP:20260504T031704
CREATED:20220620T163008Z
LAST-MODIFIED:20220620T163008Z
UID:7848-1634209200-1634212800@www.lapth.cnrs.fr
SUMMARY:Hierarchical three-body problem
DESCRIPTION:Abstract : The motion of three bodies can be solved perturbatively when a tightly bound inner binary is orbited by a distant perturber on an elliptic orbit. The exchange of angular momentum between the two orbits gives rise to Kozai-Lidov oscillations of eccentricity and inclination characterizing many different systems in astronomy. In this talk\, I will first review the Newtonian version of the Kozai-Lidov mechanism before introducing the effect of relativistic corrections with applications to gravitational wave astronomy. I will show how one can systematically compute first post-Newtonian terms in the hierarchical three-body problem and discuss their influence on the dynamics of the system. \nFinally\, I will present a new kind of relativistic resonance and its effect on the eccentricity of the inner binary\, which could potentially be measurable in the phase of gravitational waves.
URL:https://www.lapth.cnrs.fr/en/event/hierarchical-three-body-problem/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211005T110000
DTEND;TZID=Europe/Paris:20211005T120000
DTSTAMP:20260504T031704
CREATED:20220620T162955Z
LAST-MODIFIED:20220620T162955Z
UID:7810-1633431600-1633435200@www.lapth.cnrs.fr
SUMMARY:[Journal Club] Muon g-2 from muonium spectroscopy
DESCRIPTION:
URL:https://www.lapth.cnrs.fr/en/event/journal-club-muon-g-2-from-muonium-spectroscopy/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20210927T080000
DTEND;TZID=Europe/Paris:20210927T170500
DTSTAMP:20260504T031704
CREATED:20220620T162957Z
LAST-MODIFIED:20220620T162957Z
UID:7814-1632729600-1632762300@www.lapth.cnrs.fr
SUMMARY:Journée Théorie du CPTGA
DESCRIPTION:Le CPTGA vous invite à sa 12ème “Journée de Physique Théorique”. \nLe but de ces journées est de permettre des échanges entre physiciens théoriciens de Grenoble/Annecy travaillant dans des domaines très variés. Il est à la fois question de comprendre de la belle science et de découvrir le travail des collègues locaux. \nLes thèmes de la Journée Théorie 2021 sont « Matière et énergie noires » et « Information quantique ». \nLe programme sur le site web est provisoire. Il sera complété au fur et à mesure. \nMerci de s’inscrire avant le 16 septembre 2021.
URL:https://www.lapth.cnrs.fr/en/event/journee-theorie-du-cptga/
CATEGORIES:Upcoming Workshops
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20210927T080000
DTEND;TZID=Europe/Paris:20210927T090000
DTSTAMP:20260504T031704
CREATED:20220620T163008Z
LAST-MODIFIED:20220620T163008Z
UID:7851-1632729600-1632733200@www.lapth.cnrs.fr
SUMMARY:Journée CPTGA
DESCRIPTION:See webpage \nhttps://indico.in2p3.fr/event/24592/
URL:https://www.lapth.cnrs.fr/en/event/journee-cptga/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20210708T110000
DTEND;TZID=Europe/Paris:20210708T120000
DTSTAMP:20260504T031704
CREATED:20220620T163008Z
LAST-MODIFIED:20220620T163008Z
UID:7850-1625742000-1625745600@www.lapth.cnrs.fr
SUMMARY:Modern methods for scattering amplitudes\, with an application to di-photon plus jet production at two-loop order in QCD (remote talk)
DESCRIPTION:Scattering amplitudes play a central role in our understanding of the fundamental laws of nature. On the one hand they constitute the bridge between theory and experiments\, allowing to compute predictions starting from a theoretical model. On the other\, they shed light on the underlying properties of quantum field theories. To both ends\, analytic results for multi-particle multi-loop amplitudes are in high demand. In particular\, the foremost and most urgent challenge is currently represented by five-particle amplitudes at two-loop order. Despite the dramatic recent progress\, such computations remain formidable tasks. I review the cutting edge mathematical methods used in the analytic calculation of scattering amplitudes. As an application\, I present the recent computation of the gluon-initiated contribution to di-photon plus jet production up to two loops in QCD.
URL:https://www.lapth.cnrs.fr/en/event/modern-methods-for-scattering-amplitudes-with-an-application-to-di-photon-plus-jet-production-at-two-loop-order-in-qcd-remote-talk/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20210624T110000
DTEND;TZID=Europe/Paris:20210624T120000
DTSTAMP:20260504T031704
CREATED:20220620T163008Z
LAST-MODIFIED:20220620T163008Z
UID:7849-1624532400-1624536000@www.lapth.cnrs.fr
SUMMARY:Detached high-mass X-ray binaries : mass transfer and coupling to the magnetosphere
DESCRIPTION:Once massive stars leave the main sequence\, their evolution is largely set by mass loss through intense radiation-driven winds. Stellar multiplicity has been recognized as a ubiquitous feature: stars seldom live an effectively single life. In the advanced evolutionary stages of a massive binary\, mass transfer via stellar winds can become significant and decide the final fate of both bodies. In high mass X-ray binaries (HMXBs)\, which are good progenitor candidates for merging compact objects\, a blue supergiant is in close orbit with a a young and highly magnetized neutron star (NS) or a black hole (BH) which captures a fraction of the stellar wind. \nIn this talk\, I will show how the numerical tool grants us access to accurate estimates of the mass and angular momentum transfer rates in wind-fed HMXBs. After describing the conditions of formation of wind-captured disks around the NS or the BH\, I will discuss the long term evolution of the orbital separation. We will see that HMXBs in the solar neighbourhood spend a significant fraction of their lifetime with an X-ray luminosity above detectable levels. I will present the implications for phases of enhanced mass transfer\, for the spinning up and down of the accretor and for the natal kick of the compact object. Finally\, I will report on recent results concerning particle acceleration in the magnetosphere of a Kerr BH connected to a Keplerian disk\, a mechanism which might be responsible for coronal heating and non-thermal flares. \n– – – \nAfter a seminal research experience with Saul Rappaport at MIT in 2011-2012\, I graduated in Paris in 2016. During my PhD\, I made use of grid-based numerical simulations to characterize the flow surrounding an accreting compact object moving with respect to an ambient medium. In Leuven\, I was granted a Pegasus Marie Curie fellowship to model mass transfer through wind capture in high-mass X-ray binaries. I moved to Grenoble in October this year where I now work with Benoît Cerutti on particle-in-cell simulations of magnetic reconnection in the magnetosphere of black holes.
URL:https://www.lapth.cnrs.fr/en/event/detached-high-mass-x-ray-binaries-mass-transfer-and-coupling-to-the-magnetosphere/
CATEGORIES:Weekly seminars
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