Relaxing LHC constraints on the WR mass

We study the mass bounds of the WR gauge boson in generic left-right symmetric models. Assuming that the gauge bosons couple universally to quarks and leptons, we allow different gauge couplings gR≠gL and mass mixing VCKML≠VCKMR in the left and right sectors. Imposing constraints from collider exper...

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Bibliographic Details
Published in:Physical review. D 2019-02, Vol.99 (3), p.1
Main Authors: Frank, Mariana, Özdal, Özer, Poulose, Poulose
Format: Article
Language:English
Subjects:
Bosons
Confidence intervals
Couplings
Large Hadron Collider
Leptons
Neutrinos
Online Access:Get full text
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Summary:We study the mass bounds of the WR gauge boson in generic left-right symmetric models. Assuming that the gauge bosons couple universally to quarks and leptons, we allow different gauge couplings gR≠gL and mass mixing VCKML≠VCKMR in the left and right sectors. Imposing constraints from collider experiments and K0, Bd, Bs physics, we investigate scenarios where WR is lighter or heavier than the right-handed neutrino νR. In these scenarios, WR mass bounds can be considerably relaxed, while ZR mass bounds are much more stringent. In the case where MWR≤MνR, the experimental constraints come from the WR→tb and WR→jj channels, while if MWR≥MνR, the dominant constraints come from WR→ℓℓjj. The observed (expected) limits in the two-dimensional (MWR, MνR) mass plane excluded at the 95% confidence level extend to approximately MWR=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 MνR=2.1(2.1) TeV in the ee channel and 2.6 (2.5) TeV in the (μμ) channel, representing a significant relaxation of the mass bounds.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.99.035001