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DTSTART:20250330T010000
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DTSTART;TZID=Europe/Rome:20250225T113000
DTEND;TZID=Europe/Rome:20250225T130000
DTSTAMP:20260422T034824
CREATED:20250205T125458Z
LAST-MODIFIED:20250205T125458Z
UID:38980-1740483000-1740488400@w3.lnf.infn.it
SUMMARY:(H)ALPing the 511 keV line: A thermal DM interpretation of the 511 keV emission
DESCRIPTION:Speaker: Giulio Marino (Istituto Nazionale di Fisica Nucleare) \nWe propose a novel framework where MeV-scale Dirac Dark Matter annihilates into axion-like particles\, providing a natural explanation for the 511 keV gamma-ray line observed in the Galactic Center. The relic abundance is determined by p-wave annihilation into two axion-like particles\, while s-wave annihilation into three axion-like particles\, decaying into e+e− pairs\, accounts for the line intensity. Remarkably\, this model\, assuming a standard Navarro-Frenk-White profile\, reproduces the observed emission morphology\, satisfies in-flight annihilation and cosmological bounds\, and achieves the correct relic density\, offering a compelling resolution to this longstanding anomaly. \n 
URL:/event/halping-the-511-kev-line-a-thermal-dm-interpretation-of-the-511-kev-emission/
LOCATION:Aula Seminari\, Via Enrico Fermi\, 40\, Frascati\, Roma\, 00044\, Italia
CATEGORIES:Seminari teorici
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