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Low-mass right-handed sneutrino dark matter: SuperCDMS and LUX constraints and the Galactic Centre gamma-ray excess

Cerdeno, David G.; Peiró, Miguel; Robles, Sandra

Low-mass right-handed sneutrino dark matter: SuperCDMS and LUX constraints and the Galactic Centre gamma-ray excess Thumbnail


Authors

David G. Cerdeno

Miguel Peiró

Sandra Robles



Abstract

Recent results from direct and indirect searches for dark matter (DM) have motivated the study of particle physics models that can provide weakly interacting massive particles (WIMPs) in the mass range 1–50 GeV. Viable candidates for light WIMP DM must fulfil stringent constraints. On the one hand, the observation at the LHC of a Higgs boson with Standard Model properties set an upper bound on the coupling of light DM particles to the Higgs, thereby making it difficult to reproduce the correct relic abundance. On the other hand, the recent results from direct searches in the CDMSlite, SuperCDMS and LUX experiments have set upper constraints on the DM scattering cross section. In this paper, we investigate the viability of light right-handed sneutrino DM in the Next-to-Minimal Supersymmetric Model (NMSSM) in the light of these constraints. To this aim, we have carried out a scan in the NMSSM parameter space, imposing experimental bounds on the Higgs sector and low-energy observables, such as the muon anomalous magnetic moment and branching ratios of rare decays. We demonstrate that the enlarged Higgs sector of the NMSSM, together with the flexibility provided by the RH sneutrino parameters, make it possible to obtain viable RH sneutrino DM with a mass as light as 2 GeV. We have also considered the upper bounds on the annihilation cross section from Fermi LAT data on dwarf spheroidal galaxies, and extracted specific examples with mass in the range 8–50 GeV that could account for the apparent low-energy excess in the gamma-ray emission at the Galactic Centre. Then, we have computed the theoretical predictions for the elastic scattering cross-section of RH sneutrinos. Finally, after imposing the recent bounds from SuperCDMS and LUX, we have found a wide area of the parameter space that could be probed by future low-threshold direct detection

Citation

Cerdeno, D. G., Peiró, M., & Robles, S. (2014). Low-mass right-handed sneutrino dark matter: SuperCDMS and LUX constraints and the Galactic Centre gamma-ray excess. Journal of Cosmology and Astroparticle Physics, 2014(08), https://doi.org/10.1088/1475-7516/2014/08/005

Journal Article Type Article
Acceptance Date Apr 1, 2014
Online Publication Date Aug 1, 2014
Publication Date Aug 1, 2014
Deposit Date Dec 14, 2015
Publicly Available Date Mar 28, 2024
Journal Journal of Cosmology and Astroparticle Physics
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 2014
Issue 08
DOI https://doi.org/10.1088/1475-7516/2014/08/005

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Article funded by SCOAP3. Content from this work may be used
under the terms of the Creative Commons Attribution 3.0 License.
Any further distribution of this work must maintain attribution to the author(s)
and the title of the work, journal citation and DOI.





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