2018/12/13 by Mariana Frank, Özer Özdal, Poulose Poulose · 1 citation
Physics and Astronomy · #hep-ph
paper · pdf · doi:10.1103/physrevd.99.035001
published as Phys. Rev. D 99, 035001 (2019) · 18 pages, 16 figures
arxiv created 2018/12/13 · arxiv updated 2019/02/13
We study 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 WR → tb and WR → jj channels, while if MWR ≥ MνR, the dominant constraints come from WR → ℓ ℓ jj . The observed (expected) limits in the two-dimensional (MWR, MνR) mass plane excluded at 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) in the (μμ) channel, representing a significant relaxation of the mass bounds.