Monochromatic neutrinos from dark matter through the Higgs portal - INSPIRE

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Monochromatic neutrinos from dark matter through the Higgs portal

Sep 1, 2023

18 pages

Published in:

JCAP 11 (2023) 068

Published: Nov 14, 2023

e-Print:

2309.00374 [hep-ph]

DOI:

10.1088/1475-7516/2023/11/068

View in:

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Abstract: (IOP)

We define a minimalmodel of dark matter with a fermion singletχ coupled to the visible sector through the Higgs portal and with a heavyDirac neutrino N that opens the annihilation channel χχ → Nν.The model provides the observed relic abundance consistently with bounds from direct searches andimplies a monochromatic neutrino signal at 10 GeV–1 TeV in indirect searches. In particular,we obtain the capture rate of χ by the Sun and show that the signal could be above the neutrino floor producedby cosmic rays showering in the solar surface. In mostbenchmark models this solar astrophysical background is above the expected dark matter signal, so the model that we proposeis a canonical example of WIMP not excluded by direct searches thatcould be studied at neutrino telescopes and also at colliders.

Note:

18 pages

dark matter theory
dark matter experiments
neutrino astronomy
fermion: singlet
model: minimal
neutrino: Dirac
surface: solar
neutrino: detector
dark matter: density
capture

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