WIMP dark matter in the U$\mu \nu$SSM

Aguilar-Saavedra, J. A.; Pierre, M.; Muñoz, C.; López-Fogliani, D. E.

Preprint

PUBDB-2021-04174

WIMP dark matter in the U$\mu \nu$SSM

Aguilar-Saavedra, J. A. (Corresponding author) ; López-Fogliani, D. E. (Corresponding author) ; Muñoz, C. (Corresponding author) ; Pierre, M. (Corresponding author)DESY*

2022

[10.3204/PUBDB-2021-04174]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2021-04174

Report No.: DESY-21-181; IFT--UAM/CSIC-21-124; arXiv:2111.07091

Abstract: The U$\mu \nu$SSM is a U(1)' extension of the U$\mu \nu$SSM supersymmetric model, where baryon-number-violating operators as well as explicit mass terms are forbidden, and the potential domain wall problem is avoided. The gauge anomaly-cancellation conditions impose the presence of exotic quark superfields in the spectrum of U$\mu \nu$SSM models, and allow the presence of several singlet superfields under the standard model gauge group, in addition to the right-handed neutrino superfields. The gauge structure implies an additional discrete Z $_{2}$ symmetry in the superpotential, ensuring the stability of a singlet which behaves as WIMP dark matter without invoking R-parity. We analyze this novel possibility in detail, using the fermionic component of the singlet as the dark matter candidate. In particular, we compute its amount of relic density via Z', Higgs-right sneutrino and dark matter mediated annihilations, and its potential signals in dark matter direct detection experiments. The constraints on the parameter space due to Z'; direct searches at the LHC are imposed in the analysis, as well as those from the hadronization inside the detector of the exotic quarks. Large regions of the parameter space turn out to be in the reach of the upcoming Darwin experiment.

Keyword(s): quark: exotic ; WIMP: dark matter ; dark matter: mediation ; neutrino: right-handed ; dark matter: direct detection ; superfield: singlet ; neutrino: superfield ; stability ; domain wall ; annihilation ; symmetry: U(1) ; interpretation of experiments: CERN LHC Coll ; superpotential ; supersymmetry ; dark matter: relic density ; sneutrino ; hadronization ; structure ; dark matter theory ; particle physics - cosmology connection ; supersymmetry and cosmology

Classification:

ddc:530

Note: Version published in JCAP. Discussions expanded, a new section about exotic quark constraints from cosmology included, references added. 37 pages, 11 figures

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