Primordial black hole dark matter evaporating on the neutrino floor

Physics Letters B

Stefano Morisi¹  Damiano F.G. Fiorillo¹  Gennaro Miele²  Antonio Palazzo²  Roberta Calabrese² 

[1] INFN - Sezione di Napoli, Complesso Univ. Monte S. Angelo, I-80126 Napoli, Italy;Università degli Studi di Napoli “Federico II”, Complesso Univ. Monte S. Angelo, I-80126 Napoli, Italy;

关键词: Neutrinos;    Dark matter;    Primordial black holes;    Direct dark matter seraches;   

DOI  :  

来源: DOAJ

【 摘 要 】

Primordial black holes (PBHs) hypothetically generated in the first instants of life of the Universe are potential dark matter (DM) candidates. Focusing on PBHs masses in the range [5×1014−5×1015] g, we point out that the neutrinos emitted by PBHs evaporation can interact through the coherent elastic neutrino nucleus scattering (CEνNS) producing an observable signal in multi-ton DM direct detection experiments. We show that with the high exposures envisaged for the next-generation facilities, it will be possible to set bounds on the fraction of DM composed by PBHs improving the existing neutrino limits obtained with Super-Kamiokande. We also quantify to what extent a signal originating from a small fraction of DM in the form of PBHs would modify the so-called “neutrino floor”, the well-known barrier towards detection of weakly interacting massive particles (WIMPs) as the dominant DM component.

【 授权许可】

Unknown