Using leptons $p_T$ measurements to constrain $Z^{\prime }$-bosons widths in Drell-Yan processes at the LHC

Abstract

We recognise the appearance of a Focus Point (FP) in the transverse momentum distribution of either leptons originating from a BSM $Z^{\prime }$-boson decay, after a simple normalisation procedure. Exploring the properties of the FP we will be able to define in a general way a new observable, the Focus Point Asymmetry ($A_{\mathrm{FP}}$), which can be used to set constrains on the $Z^{\prime }$ width. We discuss the potential and the sensitivity of the $A_{\mathrm{FP}}$ in as diagnostic tool for $Z^{\prime }$ physics, considering various $Z^{\prime }$ phenomenological realisations.

Comments: 7 pages, 5 figures, Proceedings of The Fifth Annual Conference on Large Hadron Collider Physics, Shanghai Jiao Tong University, Shanghai, China, May 15-20, 2017