21–24 Sept 2021
DESY Hamburg
Europe/Berlin timezone

Direct detection of light dark matter from evaporating primordial black holes

22 Sept 2021, 15:00
15m
Main Auditorium

Main Auditorium

Cosmology & Astroparticle Physics Parallel Sessions: Cosmology

Speaker

Marco Chianese (University of Naples, Federico II)

Description

The direct detection of sub-GeV dark matter interacting with nucleons is hampered by the low recoil energies induced by scatterings in the detectors. This experimental difficulty is avoided in the scenario of boosted dark matter where a component of dark matter particles is endowed with large kinetic energies. In this Letter, we point out that the current evaporation of primordial black holes with masses from $10^{14}$ to $10^{16}$ g is a source of boosted light dark matter with energies of tens to hundreds of MeV. Focusing on the XENON1T experiment, we show that these relativistic dark matter particles could give rise to a signal orders of magnitude larger than the present upper bounds. Therefore, we are able to significantly constrain the combined parameter space of primordial black holes and sub-GeV dark matter. In the presence of primordial black holes with a mass of $10^{15}~\mathrm{g}$ and an abundance compatible with present bounds, the limits on DM-nucleon cross-section are improved by four orders of magnitude.

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Primary author

Marco Chianese (University of Naples, Federico II)

Co-authors

Damiano Francesco Giuseppe Fiorillo (University of Naples "Federico II") Ninetta Saviano (INFN) Mrs Roberta Calabrese (University of Naples Federico II)

Presentation materials