Relaxing LHC constraints on the $W_R$ mass

Mariana Frank; Özer Özdal; Poulose Poulose

doi:10.1103/PhysRevD.99.035001

paper

Relaxing LHC constraints on the $W_{R}$ mass

arXiv:1812.05681 · doi:10.1103/PhysRevD.99.035001

Abstract

We study mass bounds of the $W_{R}$ gauge boson in generic left-right symmetric models. Assuming that the gauge bosons couple universally to quarks and leptons, we allow different gauge couplings $g_{R} \neq = g_{L}$ and mass mixing, $V_{C K M}^{L} \neq = V_{C K M}^{R}$ in the left and right sectors. Imposing constraints from collider experiments and $K^{0}$ , $B_{d}$ , $B_{s}$ physics, we investigate scenarios where $W_{R}$ is lighter, or heavier than the right handed neutrino $ν_{R}$ . In these scenarios, $W_{R}$ mass bounds can be considerably relaxed, while $Z_{R}$ mass bounds are much more stringent. In the case where $M_{W_{R}} \leq M_{ν_{R}}$ , the experimental constraints come from $W_{R} \to t b$ and $W_{R} \to j j$ channels, while if $M_{W_{R}} \geq M_{ν_{R}}$ , the dominant constraints come from $W_{R} \to ℓℓ j j$ . The observed (expected) limits in the two-dimensional ( $M_{W_{R}}$ , $M_{ν_{R}}$ ) mass plane excluded at 95\% confidence level extend to approximately $M_{W_{R}}$ = 3.1 (3.3) TeV in the $ee$ channel and 3.3 (3.4) TeV in the ( $μμ$ ) channel, for a large range of right-handed neutrino masses up to $M_{ν_{R}}$ = 2.1 (2.1) TeV in the $ee$ channel and 2.6 (2.5) in the ( $μμ$ ) channel, representing a significant relaxation of the mass bounds.

arXiv comment18 pages, 16 figures

Relaxing LHC constraints on the $W_{R}$ mass

Abstract

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Relaxing LHC constraints on the WR​ mass

Abstract

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Relaxing LHC constraints on the $W_{R}$ mass