Speaker
Description
Primordial black holes hypothetically generated in the first instants of life of the Universe are potential dark matter candidates. Focusing on primordial black holes masses in the range $[5 \times 10^{14} − 5\times 10^{15}]$g, we point out that the neutrinos emitted by primordial black holes evaporation can interact through the coherent elastic neutrino-nucleus scattering producing an observable signal in multi-ton dark matter 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 dark matter composed by Primordial black holes improving the existing neutrino limits obtained with Super-Kamiokande. We also quantify to what extent a signal originating from a small fraction of dark matter in the form of primordial black holes would modify the so-called “neutrino floor”, the well-known barrier towards detection of weakly interacting massive particles as the dominant dark matter component.
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