Flavored dark matter and R-parity violation

Brian Batell,Tongyan Lin,Lian-Tao Wang

doi:10.1007/jhep01(2014)075

Brian Batell, Tongyan Lin + Show 1 more

Open Access

https://doi.org/10.1007/jhep01(2014)075

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Abstract

AbstractMinimal Flavor Violation offers an alternative symmetry rationale to R-parity conservation for the suppression of proton decay in supersymmetric extensions of the Standard Model. The naturalness of such theories is generically under less tension from LHC searches than R-parity conserving models. The flavor symmetry can also guarantee the stability of dark matter if it carries flavor quantum numbers. We outline general features of supersymmetric flavored dark matter (SFDM) models within the framework of MFV SUSY. A simple model of top flavored dark matter is presented. If the dark matter is a thermal relic, then nearly the entire parameter space of the model is testable by upcoming direct detection and LHC searches.

Highlights

MFV by itself suppresses RPV couplings enough to explain the stability of the proton
The flavor symmetry can guarantee the stability of dark matter if it carries flavor quantum numbers
If the dark matter is a thermal relic, nearly the entire parameter space of the model is testable by upcoming direct detection and LHC searches

Summary

R-parity violation and MFV SUSY

In the minimal supersymmetric standard model (MSSM), the most general superpotential consistent with gauge invariance and renormalizability is given by. It is assumed that these spurions are the only source of GF breaking This assumption typically is imposed in any case of the soft breaking squark masses and trilinear scalar couplings to suppress FCNCs. Since the RPV couplings in the superpotential contain the quark and lepton fields, it is natural to ask what constraints MFV places on the size of RPV couplings. It is straightforward to incorporate neutrino masses into the theory, which allows for additional sources of lepton number violation, but MFV still can safely suppress proton decay and be consistent with various other RPV constraints [35]. Other possible LSPs, such as neutralinos, charginos, or gluinos can leave displaced vertices, as they will decay, e.g., through an offshell stop or sbottom Such signatures are very distinctive, presently the limits are not very strong. For further studies of the collider phenomenology in MFV SUSY, see refs. [35, 47, 48]

Dark matter stability from MFV

Flavored dark matter in MFV SUSY

Example: top flavored dark matter

Outlook

Findings

A Direct detection