LHC constraints on W′,Z′ that couple mainly to third generation fermions

Alper Hayreter, Xiao Gang He, German Valencia

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5 Citations (Scopus)


We use the results of CMS and ATLAS searches for resonances that decay to τν or tb and τ+τ- or tt¯ final states to constrain the parameters of non-universal W and Z gauge bosons that couple preferentially to the third generation. For the former we consider production from cb¯ annihilation and find very weak constraints on the strength of the interaction and only for the mass range between 800 and 1100 GeV from the pp→τhpTmiss channel. The constraints on the latter are much stronger and arise from both tt¯ and τ+τ- production. Treated separately, we find that the weak constraints on the W still permit an explanation of the R(D(⋆)) anomalies with a light sterile neutrino whereas the stronger constraints on the Z exclude significant light sterile neutrino contributions to the K→ πνν¯ rates. Within specific models the masses of W and Z are of course related and we briefly discuss the consequences.

Original languageEnglish
Article number912
Number of pages11
JournalEuropean Physical Journal C
Issue number10
Publication statusPublished - 3 Nov 2020

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