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X-WR-CALDESC:Events for Instituto de Física Teórica
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DTSTART;TZID=Europe/Madrid:20260212T120000
DTEND;TZID=Europe/Madrid:20260212T130000
DTSTAMP:20260424T002314
CREATED:20260209T072820Z
LAST-MODIFIED:20260209T073110Z
UID:24358-1770897600-1770901200@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: 'The Cosmic Neutrino Background is within Reach of Future Neutrino Telescopes'
DESCRIPTION:Yuber Perez-Gonzalez (IFT) will present:\n\n‘The Cosmic Neutrino Background is within Reach of Future Neutrino Telescopes’\n\nVenue & Time: Gray Room 3 / 12:00\n\nAbstract: The cosmic neutrino background (CνB) can be boosted to high energies due to scatterings with energetic cosmic rays (CRs) across cosmological scales. Previous calculations focused on neutral current incoherent and coherent elastic scatterings of cosmic-ray protons off relic neutrinos. However\, charged current interactions and deep inelastic scatterings are also expected to occur\, which enhances the boosted relic neutrino fluxes on Earth. Here\, we compute the \textit{total} diffuse boosted cosmic neutrinobackground (DBCνB) arising from CRs at all redshifts in the Universe\, accounting for neutral current and charged current elastic and deep inelastic scatterings. We find that IceCube already places an upper limit on the cosmic neutrino background overdensity in cosmological scales of ~O(100−1000) at Eν=10^10 GeV\, for a lightest neutrino mass of mν≳0.1 eV. We further show that IceCube-Gen2 could test O(1−10) CνB overdensities\, and the combination of 10 future neutrino telescopes with similar sensitivity would allow us to test the ΛCDM expected CνB density for a lightest neutrino mass compatible with the KATRIN bound.\n\nBased on 2601.09790.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-the-cosmic-neutrino-background-is-within-reach-of-future-neutrino-telescopes/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260212T120000
DTEND;TZID=Europe/Madrid:20260212T130000
DTSTAMP:20260424T002314
CREATED:20260209T073012Z
LAST-MODIFIED:20260209T073012Z
UID:24361-1770897600-1770901200@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Hilltop quintessence\, the LARGE Volume Scenario and varying-tension cosmic strings'
DESCRIPTION:Léo Veissière (IFT) will present:\n\n‘Hilltop quintessence\, the LARGE Volume Scenario and varying-tension cosmic strings’\n\nVenue & Time: Red Room / 12:00\n\nRecent observational data suggests that the dark energy equation of state parameter wDE is evolving with time\, in apparent tension with the ΛCDM standard model of cosmology. Here we review these observational results\, with particular emphasis on the evidence for phantom-like behaviour\, for which wDE < −1. In an attempt to reproduce the data\, we study a quintessence model of a single scalar field rolling down a hilltop potential\, both from a UV-agnostic perspective and from a string theory point-of-view. For the latter we focus on a scalar potential derived from type IIB supergravity in the context of the LARGE Volume Scenario (LVS)\, and investigate the cosmological dynamics of the scalar near its maximum. Finally\, we discuss whether an effective phantom behaviour can be reproduced by considering the interaction between the scalar field and cosmic strings with a time-dependent tension\, while keeping the LVS scalar potential unchanged.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-hilltop-quintessence-the-large-volume-scenario-and-varying-tension-cosmic-strings/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260212T170000
DTEND;TZID=Europe/Madrid:20260212T180000
DTSTAMP:20260424T002314
CREATED:20260209T072454Z
LAST-MODIFIED:20260209T073132Z
UID:24353-1770915600-1770919200@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Supersymmetry and morse theory'
DESCRIPTION:Chuying Wang (IFT) will present ‘Supersymmetry and morse theory’ by Edward Witten J. DIFFERENTIAL GEOMETRY 17 (1982) 661-692 \nVenue & Time: Blue Room / 17:00 \nAbstract:  \n  It is shown that the Morse inequalities can be obtained by consideration of a certain supersymmetric quantum mechanics Hamiltonian. Some of the implications of modern ideas in mathematics for supersymmetric theories are discussed.  \nMore info: https://projecteuclid.org/journals/journal-of-differential-geometry/volume-17/issue-4/Supersymmetry-and-Morse-theory/10.4310/jdg/1214437492.pdf
URL:https://www.ift.uam-csic.es/event/old-journal-club-supersymmetry-and-morse-theory/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
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