Minimal Vector-like leptonic Dark Matter and Signatures at the LHC

Abstract

We propose a minimal vector-like leptonic dark matter (DM) with renormalisable interaction in a beyond the Standard Model (SM) scenario, where the SM is augmented with a vector-like doublet and a singlet leptons. The additional fermions are odd under a discrete $Z_2$ symmetry, while the rest of the SM particles are singlets, and thus providing stability to the DM. In this scenario, we show that, the DM emerges as an admixture of the neutral component of the vector-like doublet and the singlet leptons. The singlet-doublet mixing ($\sin \theta$) plays a crucial role in yielding the correct relic density as well as in obtaining null direct DM search results through an interplay of interactions via $Z$ and Higgs mediation. The mixing is also strongly constrained from the invisible Z and Higgs decay width. We found that the correct relic abundance of DM can be obtained in a large region of parameter space for DM-mass larger than $M_Z/2$ and $\sin \theta \le 0.1$. The details of model phenomenology with collider signatures at the Large hadron Collider (LHC) are discussed. In particular, we show that for $\sin \theta \le 0.01$, the charged companion of the DM can give rise to an observable displaced vertex signature, marking a significant departure from other fermionic DM scenarios, while keeping the relic abundance intact.

22 pages, 19 figures, 5 tables; the manuscript has undergone a significant modification in parameter space scan plots, for example a summary of constraints have been added in one figure and accordingly discussions added and altered in the text; singlet-doublet mixing and its importance is highlighted. Current version is accepted in PRD

References in corpus (20)

• PYTHIA 6.4 Physics and Manual
• Dark Matter Results from 225 Live Days of XENON100 Data
• Effects of new leptons in Electroweak Precision Data
• Singlet fermionic dark matter
• Interpreting the recent results on direct search for dark matter particles in terms of relic neutralino
• Precision Constraints on Extra Fermion Generations
• Dark matter and Higgs boson physics
• Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications
• New Vector-Like Fermions and Flavor Physics
• Search for invisible decays of a Higgs boson using vector-boson fusion in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Invisible Higgs Decay Width vs. Dark Matter Direct Detection Cross Section in Higgs Portal Dark Matter Models
• Direct Detection of Non-Chiral Dark Matter
• Limits on Vectorlike Leptons from Searches for Anomalous Production of Multi-Lepton Events
• Radiative neutrino masses in the singlet-doublet fermion dark matter model with scalar singlets
• Electroweak Precision Constraints on Vector-like Fermions
• Fermionic extensions of the Standard Model in light of the Higgs couplings
• Two Higgs doublet model with vectorlike leptons and contributions to $pp\to WW$ and $H\to WW$
• Doublet-singlet model and unitarity
• Contributions of flavor violating couplings of a Higgs boson to $pp\to WW$
• Resurrecting Sneutrino (${\tilde{\nu }}_L$) Dark Matter in light of Neutrino Mass and LUX

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