Dark Matter perspective of Left-Right symmetric gauge model

Abstract

We consider an incarnation of left-right symmetric model with a local gauge symmetry of $SU(3{)}_C\otimes SU(2{)}_L\otimes U(1{)}_L\otimes SU(2{)}_R\otimes U(1{)}_R$. Heavy scalars and fermions present in the {\bf 27} of $E_6$ are included in the matter sector along with the Standard Model fermions. Two such colour singlet fermions, $N$ and $l_S$, transforming as bi-doublet and singlet under $SU(2)$s respectively, can be potential candidates for Dark Matter (DM). Assignment of $U(1)$ charges for the matter fields restricts some of the exotic fermions to interact with the SM fermions. We study in some details the prospect of such fermionic dark matters by calculating relic densities and direct detection cross-sections by treating these particles as stand alone relic particles in turn. $N$, when treated as relic particle, would produce a direct-detection cross-section very high compared to the experimental upper limits. However, the interaction rate of $N$ can be controlled by introducing a dimension-6 operator involving two $N$ fields and two SM fermions and appropriately choosing the coupling constant. This in turn, makes the interaction rate of $N$ very high and yields a small relic density. On the other hand, $l_S$ for some chosen mass window, can give us right amount of relic, but its direct detection cross-section is too small. Keeping these in mind, we propose two-component model of DM, where both $N$ and $l_S$ contribute to the relic density, albeit with unequal proportion while the direct detection cross-section limits can be satisfied mainly by $N$ in presence of an extra dimension-6 interaction. We derive limits on such an interaction from XENON experiment.

19 pages, 8 figures, 3 tables, to be appeared on NPB

References in corpus (16)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Big-Bang Nucleosynthesis
• A Theory of Dark Matter
• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• Dark Matter and Collider Phenomenology of Universal Extra Dimensions
• Simplified Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Constraining the Spin-Dependent WIMP-Nucleon Cross Sections with XENON1T
• Limits on spin-dependent WIMP-nucleon cross section obtained from the complete LUX exposure
• Common Origin of Neutrino Mass and Dark Matter from Anomaly Cancellation Requirements of a $U(1{)}_{B-L}$ Model
• Real singlet scalar dark matter extension of the Georgi-Machacek model
• Fermion Dark Matter with Scalar Triplet at Direct and Collider Searches
• A warped scalar portal to fermionic dark matter
• Phenomenology of an $E_6$ inspired extension of Standard Model: Higgs sector
• Confronting dark fermion with a doubly charged Higgs in the left-right symmetric model
• Singlet fermion dark matter and Dirac neutrinos from Peccei-Quinn symmetry

Cited by in corpus (3)

• Topological structures, dark matter and gravitational waves in $E_6$
• Exploring two component doublet dark matter
• Heavy Higgs boson Searches at the LHC in the light of a Left-Right Symmetric Model