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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220203T110000
DTEND;TZID=Europe/Paris:20220203T120000
DTSTAMP:20260410T005339
CREATED:20220620T163007Z
LAST-MODIFIED:20220620T163007Z
UID:7844-1643886000-1643889600@www.lapth.cnrs.fr
SUMMARY:Primordial neutrino asymmetry evolution in the early Universe [remote talk]
DESCRIPTION:Contrary to charged lepton degeneracies which are tightly constrained by the measured baryon-to-photon ratio\, the allowed values of the primordial neutrino asymmetries cover a large range. In order to study the evolution of these asymmetries in the early Universe\, one needs to solve a set of quantum kinetic equations that include vacuum mixing effects\, mean-field potentials and collisions (scattering and annihilations with charged leptons and among (anti)neutrinos)\, which represents a genuine numerical challenge. \nIn this talk\, I will present the results of a complete three-flavour calculation with the full collision term (which was always approximated in previous numerical studies) at the epoch of neutrino decoupling\, while laying emphasis on an effective description of neutrino oscillations that corresponds to averaging over the shortest time scale. In addition to reducing the computation time while preserving the accuracy of the results\, this “Adiabatic Transfer of Averaged Oscillations” (ATAO) approximation provides a consistent framework to understand the origin of the so-called synchronous oscillations. Moreover\, it leads to new results\, such as the existence of a regime of faster oscillations when the self-interaction mean-field domination dwindles. \n  \n 
URL:https://www.lapth.cnrs.fr/en/event/primordial-neutrino-asymmetry-evolution-in-the-early-universe-remote-talk/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220201T110000
DTEND;TZID=Europe/Paris:20220201T120000
DTSTAMP:20260410T005340
CREATED:20220620T162951Z
LAST-MODIFIED:20220620T162951Z
UID:7804-1643713200-1643716800@www.lapth.cnrs.fr
SUMMARY:Entanglement entropy of free fermions on graphs
DESCRIPTION:Abstract: \nThe von Neumann entropy is key quantity in quantum information and in the investigation of many-body models. \nIn this talk\, we will show that tools from algebraic combinatorics and from the study of time and band limiting problems can simplify its computations for systems of free fermions on graphs. 
URL:https://www.lapth.cnrs.fr/en/event/entanglement-entropy-of-free-fermions-on-graphs/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220125T110000
DTEND;TZID=Europe/Paris:20220125T120000
DTSTAMP:20260410T005340
CREATED:20220620T162955Z
LAST-MODIFIED:20220620T162955Z
UID:7812-1643108400-1643112000@www.lapth.cnrs.fr
SUMMARY:[Journal Club]  Muon g-2 and lepton flavor violation
DESCRIPTION:Abstract: [2004.01200] Vector-Like Leptons and Inert Scalar Triplet: Lepton Flavor Violation\, $g-2$ and Collider Searches (arxiv.org) \n  \nZoom link: \nhttps://cnrs.zoom.us/j/91049381574?pwd=TDZyU3NqT0k4MFk3cUMvc0JuOURCdz09
URL:https://www.lapth.cnrs.fr/en/event/journal-club-muon-g-2-and-lepton-flavor-violation/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220120T110000
DTEND;TZID=Europe/Paris:20220120T120000
DTSTAMP:20260410T005340
CREATED:20220620T163000Z
LAST-MODIFIED:20220620T163000Z
UID:7821-1642676400-1642680000@www.lapth.cnrs.fr
SUMMARY:Exploring compact binary populations with the Einstein Telescope
DESCRIPTION:The Einstein Telescope (ET)\, a wide-band\, future 3G gravitational wave detector\, is to have expected detection rates of $sim 10^5 – 10^6$ BBH detections and $sim 7 times 10^4$ BNS detections in one year. The coalescence of compact binaries with total mass 20 – 100 $M_{odot}$\, as typical of BH-BH or BH-NS binaries\, will be visible up to redshift $zapprox 20$ and higher\, thus facilitating the understanding of the dark era of the Universe preceding the birth of the first stars. The ET will therefore be a crucial instrument for population studies. We analyzed the compact binaries originating in stars from (i) Pop I and Pop II\, (ii) Pop III\, and (iii) globular clusters\, with single ET using the ET-D design sensitivity for the analysis. We estimate the constraints on the chirp mass\, redshift and merger rate with redshift for these classes of compact object binaries. We conclude that ET as a single instrument is capable of detecting and distinguishing different compact binary populations separated in chirp mass – redshift space. The mass distributions characteristics of such different compact binary populations can also be estimated with single ET. Assuming that sufficient number of binaries will be detected from each of these populations\, we also show  that such populations are distinguishable in the combined bulk detection.
URL:https://www.lapth.cnrs.fr/en/event/exploring-compact-binary-populations-with-the-einstein-telescope/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220113T110000
DTEND;TZID=Europe/Paris:20220113T120000
DTSTAMP:20260410T005340
CREATED:20220620T163000Z
LAST-MODIFIED:20220620T163000Z
UID:7822-1642071600-1642075200@www.lapth.cnrs.fr
SUMMARY:Self-Organised Localisation
DESCRIPTION: I will describe a new phenomenon in quantum cosmology: self-organised localisation. When the fundamental parameters of a theory are functions of a scalar field subject to large fluctuations during inflation\, quantum phase transitions can act as dynamical attractors. As a result\, the theory parameters are probabilistically localised around the critical value and the Universe finds itself at the edge of a phase transition. We illustrate how self-organised localisation could account for the observed near-criticality of the Higgs self-coupling\, the naturalness of the Higgs mass\, or the smallness of the cosmological constant.
URL:https://www.lapth.cnrs.fr/en/event/self-organised-localisation/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220111T110000
DTEND;TZID=Europe/Paris:20220111T120000
DTSTAMP:20260410T005340
CREATED:20220620T162952Z
LAST-MODIFIED:20220620T162952Z
UID:7805-1641898800-1641902400@www.lapth.cnrs.fr
SUMMARY:[Journal Club] A new approach to dark matter from the mass-radius diagram of the Universe
DESCRIPTION:Abstract: \n[2112.03755] A new approach to dark matter from the mass-radius diagram of the Universe (arxiv.org) \nZoom link: \nhttps://cnrs.zoom.us/j/91049381574?pwd=TDZyU3NqT0k4MFk3cUMvc0JuOURCdz09
URL:https://www.lapth.cnrs.fr/en/event/journal-club-a-new-approach-to-dark-matter-from-the-mass-radius-diagram-of-the-universe/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220106T110000
DTEND;TZID=Europe/Paris:20220106T120000
DTSTAMP:20260410T005340
CREATED:20220620T163007Z
LAST-MODIFIED:20220620T163007Z
UID:7845-1641466800-1641470400@www.lapth.cnrs.fr
SUMMARY:Non-deformation quantisation of integrable systems
DESCRIPTION:We will present a new approach to the problem of quantising integrable systems of differential-difference equations. The main idea is to lift these systems to systems defined on free associative algebras and look for the ideals there  that are stabilized by the dynamics of the lifted systems. In a reasonable class of candidate ideals\, there are typically very few that are invariant for the first equation in the integrable hierarchy. Once these ideals are picked the challenge is to prove that the whole hierarchy preserves them. We will discuss these ideas using as a key example the hierarchy of the Bogoyavlensky equation. This is a joint work with A. Mikhailov (Leeds) and J. P. Wang (U. of Kent). It is soon to be published but one can already find an introduction here : arXiv:2009.01838\n 
URL:https://www.lapth.cnrs.fr/en/event/non-deformation-quantisation-of-integrable-systems/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211217T143000
DTEND;TZID=Europe/Paris:20211217T153000
DTSTAMP:20260410T005340
CREATED:20220620T163005Z
LAST-MODIFIED:20220620T163005Z
UID:7839-1639751400-1639755000@www.lapth.cnrs.fr
SUMMARY:Exotic dark matter models : signatures and constraints [PhD defense]
DESCRIPTION:
URL:https://www.lapth.cnrs.fr/en/event/exotic-dark-matter-models-signatures-and-constraints-phd-defense/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211216T110000
DTEND;TZID=Europe/Paris:20211216T120000
DTSTAMP:20260410T005340
CREATED:20220620T163006Z
LAST-MODIFIED:20220620T163006Z
UID:7841-1639652400-1639656000@www.lapth.cnrs.fr
SUMMARY:Alphabets for Quantum Field Theory
DESCRIPTION:As the LHC accumulates data\, the need grows for more efficient\nmethods to compute scattering amplitudes. One such method manages to\nswap the difficult problem of integrating thousands of Feynman diagrams\nfor a much simpler one: solving a system of linear equations. This can\nbe done when there is a known “alphabet” of appropriate singularities\nfor the amplitudes. I will describe a case where this has been pushed\nquite far: six-particle amplitudes in maximally supersymmetric\nYang-Mills\, where I have computed amplitudes up to seven loops. I will\nthen change gears and discuss a class of functions where the form of\nthis alphabet is not yet known. These functions have surprising links to\nCalabi-Yau manifolds\, and occur in general theories as early as two loops.\n 
URL:https://www.lapth.cnrs.fr/en/event/alphabets-for-quantum-field-theory/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211207T110000
DTEND;TZID=Europe/Paris:20211207T120000
DTSTAMP:20260410T005340
CREATED:20220620T162952Z
LAST-MODIFIED:20220620T162952Z
UID:7806-1638874800-1638878400@www.lapth.cnrs.fr
SUMMARY:[Journal Club] Feynman integrals for precision high-multiplicity scattering
DESCRIPTION:Abstract: \nWe review recent advances in the calculation of the two-loop Feynman integrals which contribute to five-particle scattering amplitudes with one massive leg. These amplitudes are required to provide theoretical predictions for the three-particle production (two massless and one massive particle) at the next-to-next-to leading-order approximation. We will compare several analytic approaches to the problem as well as their numerical implications. \nZoom link: \nhttps://cnrs.zoom.us/j/91049381574?pwd=TDZyU3NqT0k4MFk3cUMvc0JuOURCdz09
URL:https://www.lapth.cnrs.fr/en/event/journal-club-feynman-integrals-for-precision-high-multiplicity-scattering/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211203T140000
DTEND;TZID=Europe/Paris:20211203T150000
DTSTAMP:20260410T005340
CREATED:20220620T163007Z
LAST-MODIFIED:20220620T163007Z
UID:7843-1638540000-1638543600@www.lapth.cnrs.fr
SUMMARY:Dynamique et chaos dans les systèmes planétaires [Colloquium]
DESCRIPTION:L’organisation du Système Solaire et la description des mouvements qui\nle caractérisent ont constitué le cœur de l’astronomie pendant de\nsiècles depuis l’antiquité. Cette science appelée Mécanique Céleste qui\nrepose sur la théorie de la gravitation a connu son heure de gloire au\nXIXe siècle\, avant de passer au second plan devant l’essor de\nl’astrophysique. Elle est aujourd’hui en plein renouveau grâce aux\nprogrès des observations\, et des capacités de calcul sur ordinateur\, qui\npermettent d’explorer numériquement le caractère intrinsèquement\nchaotique de ces mouvements. J’exposerai d’abord l’architecture du\nSystème Solaire dans l’état de nos connaissances d’aujourd’hui. Je\ndécrirai la théorie des perturbations entre planètes et son lien avec la\nmécanique Hamitonienne classique. Je montrerai qu’en général\, les\nperturbations ne détruisent pas la stabilité de l’ensemble\, mais que\ncertains phénomènes de résonances (Kozai\, moyen mouvement…) peuvent\naffecter localement l’évolution du système : instabilités\, génération\nd’astéroïdes géocroiseurs potentiellement dangereux\, effets sur l’orbite\nde la Terre et son axe de rotation\, etc… Je présente quelques théories\nrécentes comme l’instabilité dite “modèle de Nice” au début de\nl’histoire du Système Solaire\, et la récente hypothèse d’une 9ème\nplanète à l’extérieur du Système. Enfin\, je fais un tour d’horizon des\nconfigurations dynamiques rencontrées dans les milliers de systèmes\nextrasolaires connus aujourd’hui\, pour arriver à la conclusion que la\nconfiguration de notre Système Solaire est très loin de représenter la\ndiversité des architectures rencontrées.
URL:https://www.lapth.cnrs.fr/en/event/dynamique-et-chaos-dans-les-systemes-planetaires-colloquium/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211130T110000
DTEND;TZID=Europe/Paris:20211130T120000
DTSTAMP:20260410T005340
CREATED:20220620T162953Z
LAST-MODIFIED:20220620T162953Z
UID:7807-1638270000-1638273600@www.lapth.cnrs.fr
SUMMARY:[Journal Club] Flavour anomalies and the muon g-2 from feebly interacting particles
DESCRIPTION:https://arxiv.org/abs/2106.12582 \nhttps://indico.in2p3.fr/event/25013/contributions/101345/
URL:https://www.lapth.cnrs.fr/en/event/journal-club-flavour-anomalies-and-the-muon-g-2-from-feebly-interacting-particles/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211125T113000
DTEND;TZID=Europe/Paris:20211126T191000
DTSTAMP:20260410T005340
CREATED:20220620T162958Z
LAST-MODIFIED:20220620T162958Z
UID:7818-1637839800-1637953800@www.lapth.cnrs.fr
SUMMARY:Pierre Fest
DESCRIPTION:Participation to the event is by invitation only. If you would like to participate or contribute in some way\, please contact serpico _at_ lapth.cnrs.fr. \nUnless LAPTh administration takes care of your trip\, please think of reserving transportation and (above all!) the hotel ASAP\, since Annecy is a tourist destination at all times of the year. \n 
URL:https://www.lapth.cnrs.fr/en/event/pierre-fest/
CATEGORIES:Upcoming Workshops
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211122T080000
DTEND;TZID=Europe/Paris:20211124T180500
DTSTAMP:20260410T005340
CREATED:20220620T162958Z
LAST-MODIFIED:20220620T162958Z
UID:7817-1637568000-1637777100@www.lapth.cnrs.fr
SUMMARY:News from the Dark 2021
DESCRIPTION:NEWS FROM THE DARK \nLAPTh\, Annecy – November 22-24\, 2021 \nEpisode 6 \nFor more information click Here 
URL:https://www.lapth.cnrs.fr/en/event/news-from-the-dark-2021/
CATEGORIES:Upcoming Workshops
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211116T080000
DTEND;TZID=Europe/Paris:20211116T200000
DTSTAMP:20260410T005340
CREATED:20220620T162957Z
LAST-MODIFIED:20220620T162957Z
UID:7816-1637049600-1637092800@www.lapth.cnrs.fr
SUMMARY:AnLy Strings & Fields 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 first edition\, the meeting will take place in LAPTh\, Annecy\, on the 16/11/21. \n  \nTravel \nIt is not easy to go from Lyon to Annecy these days. There is no Flixbus on that date. One option is to take a non-direct train (or train + bus); we give below the schedule and the preferences for the workshop. Another option is to come by car; in that case you may consider car-sharing. \nTrain schedule: from Lyon to Annecy and back (with one change): \n8:08 – 10:00 Train + bus  (prefered)\n9:08 – 11:15 Train + train \n16:44 – 18:52 Train + train  (prefered)\n17:44 – 19:52 Train + train \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 \nThere is no lunch option close to the LAPTh (no shop\, canteen\, etc.). If you are interested\, a vegetarian lunch will be provided. Please indicate your interest when registering. \n  \nInternet \nEduroam is available at LAPTh. Another possibility is to get a guest access when you arrive. \n  \nGroup picture
URL:https://www.lapth.cnrs.fr/en/event/anly-strings-fields-in-person-meeting/
CATEGORIES:Upcoming Workshops
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211109T140000
DTEND;TZID=Europe/Paris:20211109T150000
DTSTAMP:20260410T005340
CREATED:20220620T162954Z
LAST-MODIFIED:20220620T162954Z
UID:7808-1636466400-1636470000@www.lapth.cnrs.fr
SUMMARY:[Journal Club] Observational challenges of $Lambda$CDM and recent developments within modified gravity scenarios
DESCRIPTION:https://arxiv.org/pdf/2007.00082.pdf  \nhttps://arxiv.org/pdf/2012.03950.pdf \nPlease note the unusal time!
URL:https://www.lapth.cnrs.fr/en/event/journal-club-observational-challenges-of-lambdacdm-and-recent-developments-within-modified-gravity-scenarios/
CATEGORIES:Upcoming Journal Club
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211109T110000
DTEND;TZID=Europe/Paris:20211109T120000
DTSTAMP:20260410T005340
CREATED:20220620T163007Z
LAST-MODIFIED:20220620T163007Z
UID:7846-1636455600-1636459200@www.lapth.cnrs.fr
SUMMARY:Unravelling the mystery of Dark Matter with Black Holes [Remote talk]
DESCRIPTION:Primordial black holes (PBHs)\, possibly formed via gravitational collapse of large density perturbations in the very early universe\, are one of the earliest proposed and viable dark matter (DM) candidates. PBHs can make up a large or even entirety of DM over a wide range of masses. Ultralight PBHs in the mass range of 10^{15} – 10^{17} g\, emit particles via Hawking radiation\, act as a decaying DM\, and can be probed via observations of those emitted particles in various space as well as ground based detectors. In this talk\, I will discuss how diffuse supernova neutrino background searches at the Super-Kamiokande neutrino observatory\, measurement of the 511 keV gamma-ray line by INTEGRAL telescope\, observations of low energy Galactic Center photons by the imminent soft gamma-ray telescope AMEGO\, and EDGES measurement of  the global 21-cm signal can set robust\, world-leading exclusions on the fraction of DM composed of ultralight PBHs. Finally\, I will also walk you through a novel formation mechanism of low mass transmuted black holes\, a viable non-primordial solution to sub-Chandrasekhar mass black holes\, pointing out several avenues to test the transmuted origin of low mass black holes.
URL:https://www.lapth.cnrs.fr/en/event/unravelling-the-mystery-of-dark-matter-with-black-holes-remote-talk/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211104T110000
DTEND;TZID=Europe/Paris:20211104T120000
DTSTAMP:20260410T005340
CREATED:20220620T163009Z
LAST-MODIFIED:20220620T163009Z
UID:7852-1636023600-1636027200@www.lapth.cnrs.fr
SUMMARY:The On-Shell Highway to Waveforms
DESCRIPTION:A particle physics approach to describing black hole interactions is opening new avenues for understanding gravitational-wave observations. In this talk\, we will review this paradigm change showing how general relativity naturally emerges from scattering amplitudes. Applications for deriving solutions to Einstein field equations\, the bending of light and waveforms – directly from quantum field theory – are explained.
URL:https://www.lapth.cnrs.fr/en/event/the-on-shell-highway-to-waveforms/
CATEGORIES:Weekly seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20211025T090000
DTEND;TZID=Europe/Paris:20211026T170000
DTSTAMP:20260410T005340
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:20260410T005340
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:20260410T005340
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:20260410T005340
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:20260410T005340
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:20260410T005340
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:20260410T005340
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:20260410T005340
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:20260410T005340
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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END:VCALENDAR