Right-handed sneutrino and gravitino multicomponent dark matter in light of neutrino detectors - INSPIRE

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Right-handed sneutrino and gravitino multicomponent dark matter in light of neutrino detectors

Jun 9, 2022

35 pages

Published in:

JCAP 04 (2023) 050

Published: Apr 20, 2023

e-Print:

2206.04715 [hep-ph]

DOI:

10.1088/1475-7516/2023/04/050

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Abstract: (IOP)

We investigate the possibility that right-handed (RH) sneutrinos and gravitinos can coexist and explain the dark matter (DM) problem. We compare extensions of the minimal supersymmetric standard model (MSSM) and the next-to-MSSM (NMSSM) adding RH neutrinos superfields, with special emphasis on the latter. If the gravitino is the lightest supersymmetric particle (LSP) and the RH sneutrino the next-to-LSP (NLSP), the heavier particle decays to the former plus left-handed (LH) neutrinos through the mixing between the scalar partners of the LH and RH neutrinos.However, the interaction is suppressed by the Planck mass, and if the LH-RH sneutrino mixing parameter is small, ≪ O(10

^{-2}

), a long-lived RH sneutrino NLSP is possible even surpassing the age of the Universe.As a byproduct, the NLSP to LSP decay produces monochromatic neutrinos in the ballpark of current and planned neutrino telescopes like Super-Kamiokande, IceCube and Antares that we use to set constraints and show prospects of detection.In the NMSSM+RHN, assuming a gluino mass parameter M

_{3}

= 3 TeV we found the following lower limits for the gravitino mass m

_{3/2}

≳ 1-600 GeV and the reheating temperature T

_{R}

≳ 10

^{5}

- 3 × 10

^{7}

GeV, for mν̃R10-800 GeV. If we take M

_{3}

= 10 TeV, then the limits on TR are relaxed by one order of magnitude.

Note:

Discussions improved and expanded, version published in JCAP, 35 pages, 7 figures, 3 tables

dark matter theory
dark matter experiments
neutrino detectors
new physics
supersymmetry: dark matter
minimal supersymmetric standard model
sneutrino: right-handed
sneutrino: dark matter
sneutrino: NLSP
sneutrino: decay

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