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Sparticle spectroscopy and dark matter in a U(1)B−L extension of MSSM.
- Source :
- Journal of High Energy Physics; Jan2021, Vol. 2021 Issue 1, p1-45, 45p
- Publication Year :
- 2021
-
Abstract
- We consider a class of SUSY models in which the MSSM gauge group is supplemented with a gauged U(1)<subscript>B−L</subscript> symmetry and a global U(1)<subscript>R</subscript> symmetry. This extension introduces only electrically neutral states, and the new SUSY partners effectively double the number of states in the neutralino sector that now includes a blino (from B − L) and singlino from a gauge singlet superfield. If the DM density is saturated by a LSP neutralino, the model yields quite a rich phenomenology depending on the DM composition. The LSP relic density constraint provides a lower bound on the stop and gluino masses of about 3 TeV and 4 TeV respectively, which is testable in the near future collider experiments such as HL-LHC. The chargino mass lies between 0.24 TeV and about 2.0 TeV, which can be tested based on the allowed decay channels. We also find m τ ˜ 1 ≳ 500 GeV, and m e ˜ , m μ ˜ , m v ˜ S , P ≳ 1 TeV. We identify chargino-neutralino coannihilation processes in the mass region 0.24 TeV ≲ m χ ˜ 1 0 ≈ m χ ˜ 1 ± ≲ 1.5 TeV, and also coannihilation processes involving stau, selectron, smuon and sneutrinos for masses around 1 TeV. In addition, A<subscript>2</subscript> resonance solutions are found around 1 TeV, and H<subscript>2</subscript> and H<subscript>3</subscript> resonance solutions are also shown around 0.5 TeV and 1 TeV. Some of the A<subscript>2</subscript> resonance solutions with tan β ≳ 20 may be tested by the A/H → τ<superscript>+</superscript>τ<superscript>−</superscript> LHC searches.. While the relic density constraint excludes the bino-like DM, it is still possible to realize higgsino, singlino and blino-like DM for various mass scales. We show that all these solutions will be tested in future direct detection experiments such as LUX-Zeplin and Xenon-nT. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11266708
- Volume :
- 2021
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Journal of High Energy Physics
- Publication Type :
- Academic Journal
- Accession number :
- 148347837
- Full Text :
- https://doi.org/10.1007/JHEP01(2021)161