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SUMMARY:Probing Memory-Burdened Primordial Black Holes with Multi-Messenge
 r Observations
DTSTART;VALUE=DATE-TIME:20261024T073000Z
DTEND;VALUE=DATE-TIME:20261024T075000Z
DTSTAMP;VALUE=DATE-TIME:20261025T020041Z
UID:indico-contribution-3013@indico.itp.ac.cn
DESCRIPTION:Speakers: Xiu-hui Tan (Institute of Theoretical Physics\, CAS)
 \nThe memory burden (MB) effect can dramatically slow black hole evaporati
 on once half of the initial mass is radiated\, allowing very light primord
 ial black holes (PBHs) to persist today as dark matter (DM). We probe this
  scenario across three complementary messengers.\n\nUsing LHAASO ultra-hig
 h-energy gamma-ray spectra of four Galactic sources\, we constrain PBHs wi
 th masses 10^9 g. From 10 years of IceCube muon-track data and 14 dwarf sp
 heroidal galaxies with D-factor uncertainties treated via a profile likeli
 hood\, we derive neutrino limits on the PBH abundance. The cosmic-ray sign
 al from memory-burdened PBHs is also considered but yields weaker constrai
 nts.\n\nIn all channels no significant excess over background is found. Th
 e gamma-ray and neutrino probes provide independent and complementary limi
 ts on the MB scenario\; the neutrino results improve substantially on prev
 ious work in the k=1 case\, while the k=2 case and the cosmic-ray channel 
 remain less constraining due to limited instrumental sensitivity in the re
 levant energy ranges. Our combined analysis thus significantly narrows the
  allowed parameter space for PBH dark matter under the MB effect.\n\nhttps
 ://indico.itp.ac.cn/event/427/contributions/3013/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/3013/
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