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DTSTART;TZID=Europe/Madrid:20260707T150000
DTEND;TZID=Europe/Madrid:20260707T170000
DTSTAMP:20260705T043951
CREATED:20260624T084812Z
LAST-MODIFIED:20260702T111259Z
UID:25291-1783436400-1783443600@www.ift.uam-csic.es
SUMMARY:Seminar: 'Sub-GeV Dark Matter\, Neutrino Masses\, and Astrophysical Signals from a Rich Dark Sector'
DESCRIPTION:Title: ‘Sub-GeV Dark Matter\, Neutrino Masses\, and Astrophysical Signals from a Rich Dark Sector.’ \nSpeaker: Elina Merkel (University of Bologna) \nVenue&Time: Red Room / 15:00 \nAbstract: Rich dark sectors provide an attractive framework for addressing several puzzles in particle physics and cosmology within a single model. In this talk\, I will present a simple sub-GeV dark-sector realization featuring a dark matter candidate\, a light scalar mediator\, and an extended neutrino sector. I will show how the model can reproduce the observed relic abundance\, generate light neutrino masses\, and satisfy cosmological constraints. I will then discuss its phenomenological implications\, focusing on neutrino signals that could be probed by current and future neutrino telescopes.
URL:https://www.ift.uam-csic.es/event/seminar-sub-gev-dark-matter-neutrino-masses-and-astrophysical-signals-from-a-rich-dark-sector/
CATEGORIES:Scientific activities,Seminars
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DTSTART;TZID=Europe/Madrid:20260709T150000
DTEND;TZID=Europe/Madrid:20260709T160000
DTSTAMP:20260705T043951
CREATED:20260525T063643Z
LAST-MODIFIED:20260702T081635Z
UID:25095-1783609200-1783612800@www.ift.uam-csic.es
SUMMARY:Seminar: ‘The Hunt for Multiple Axions’
DESCRIPTION:Title: ‘The Hunt for Multiple Axions’ \nSpeaker: Arturo de Giorgi (University of Durham). \nVenue&Time: Red Room / 15:00 \nAbstract: Axions and axion-like particles may arise in Nature as a spectrum rather than as a single field. Such a scenario naturally emerges in string-inspired constructions\, as well as in reasonably simple bottom-up extensions of single axion models. In such multi-axion scenarios\, new signal features arise\, and recasting of existing experimental bounds from single-axion constraints becomes generally non-trivial. This motivates a closer look at how laboratory axion searches are impacted when multiple states contribute. In this talk\, I will first briefly introduce bulk axions in extra dimensions as a concrete framework that naturally generates multiple modes\, and highlight some of the phenomenological subtleties that follow. I will then present general results for multi-axions–photon oscillations\, showing how coherence and interference can either enhance or suppress signals\,  with direct implications for light-shining-through-a-wall experiments and beyond.
URL:https://www.ift.uam-csic.es/event/seminar-by-arturo-de-giorgi/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
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