We reexamine the ubiquitous $U(1)$ extension of the Standard Model (SM), with a new neutral gauge boson ($Z'$), in a truly model-independent approach. No new fermions, except for three right-handed neutrinos, are added. We use the current LHC Drell-Yan data to put model-independent constraints on the $Z'$ parameter space, defined by $M_{Z'}$, the $Z$-$Z'$ mixing angle ($\alpha_z$) and the extra $U(1)$ effective gauge coupling ($g'_x$), which absorb all model dependence. Additional constraints are imposed from unitarity and $\nu_\mu$-$e$ scattering. However, limits extracted from direct searches turn out to be the most stringent.
A reappraisal of constraints on $Z^{\prime}$ models from unitarity and direct searches at the LHC
Full text:
pdf
Pre-published on:
October 15, 2019
Published on:
December 12, 2019
Abstract
DOI: https://doi.org/10.22323/1.341.0153
How to cite
Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.
Open Access
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.