WIMP dark matter in the U mu nu SSM Aguilar Saavedra, Juan Antonio Dark matter theory Particle physics-cosmology connection Supersymmetry and cosmology The authors would like to thank Genevieve Belanger for useful discussions and help with the code micrOMEGAs. The research of JAAS was supported by the Spanish Agencia Estatal de Investigacion (AEI) through project PID2019-110058GB-C21 and by FCT project CERN/FIS-PAR/0004/2019. The work of DL was supported by the Argentinian CONICET, and also acknowledges the support through PIP 11220170100154CO. The research of CM and MP was supported by the Spanish AEI through the grants PGC2018-095161-B-I00 (EU FEDER) and IFT Centro de Excelencia Severo Ochoa SEV-2016-0597. MP acknowledges support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany`s Excellence Strategy - EXC 2121 "Quantum Universe" - 390833306. This work was made possible by with the support of the Institut Pascal at Universite Paris-Saclay during the Paris-Saclay Astroparticle Symposium 2021, with the support of the P2IO Laboratory of Excellence (program "Investissements d'avenir" ANR-11-IDEX-0003-01 Paris-Saclay and ANR-10-LABX-0038), the P2I axis of the Graduate School Physics of Universite Paris-Saclay, as well as IJCLab, CEA, IPhT, APPEC, the IN2P3 master projet UCMN and EuCAPT ANR-11-IDEX-0003-01 Paris-Saclay and ANR-10-LABX-0038). 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. 2022-06-14T07:22:55Z 2022-06-14T07:22:55Z 2022-05-05 info:eu-repo/semantics/article J.A. Aguilar-Saavedra... [et al.], JCAP05(2022)004. [https://doi.org/10.1088/1475-7516/2022/05/004] http://hdl.handle.net/10481/75469 10.1088/1475-7516/2022/05/004 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España Institute of Physics