Associated $Z^{\prime }$ production in the flavorful $U(1)$ scenario for $R_{K^{(\ast )}}$

Abstract

The flavorful $Z^{\prime }$ model with its couplings restricted to the left-handed second generation leptons and third generation quarks can potentially resolve the observed anomalies in $R_K$ and $R_{K^{\ast }}$. After examining the current limits on this model from various low-energy processes, we probe this scenario at 14 TeV high-luminosity run of the LHC using two complementary channels: one governed by the coupling of $Z^{\prime }$ to $b$-quarks and the other to muons. We also discuss the implications of the latest LHC high mass resonance searches in the dimuon channel on the model parameter space of our interest.

23 pages, 13 figures, 3 tables, Figures 5, 6, 7 and 8 have been modified, references have been updated, footnote added on page 12, version accepted for publication in The European Physical Journal C