WIMP dark matter in the U mu nu SSM
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Institute of Physics
Dark matter theoryParticle physics-cosmology connectionSupersymmetry and cosmology
J.A. Aguilar-Saavedra... [et al.], JCAP05(2022)004. [https://doi.org/10.1088/1475-7516/2022/05/004]
SponsorshipSpanish Government PID2019-110058GB-C21; Portuguese Foundation for Science and Technology CERN/FIS-PAR/0004/2019; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) PIP 11220170100154CO; Spanish Government PGC2018-095161-B-I00; IFT Centro de Excelencia Severo Ochoa SEV-2016-0597; German Research Foundation (DFG) 2121 390833306; P2IO Laboratory of Excellence ANR-10-LABX-0038; P2I axis of the Graduate School Physics of Universite Paris-Saclay; French Atomic Energy Commission ANR-10-LABX-0038; EuCAPT ANR-11-IDEX-0003-01
The U mu nu SSM is a U(1)' extension of the 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.