Speaker
Description
Searches for anomalous neutral triple gauge boson couplings (NTGCs) can provide important tests for the gauge structure of the Standard Model (SM). The leading SMEFT contribution to NTGCs appears at dimension-8 and four different CP-conserving operators are required to describe correctly all possible NTGC form factors. We study a variety of extensions of the SM with heavy vector-like fermions and calculated their matching to SMEFT dimension-8 NTCG operators. Despite stringent experimental constraints on NTGCs the limits on the scale of these UV models are relatively weak because their contributions, arising at dimension-8 and 1-loop, are doubly suppressed. I will present benchmark UV scenarios that are suited for interpreting searches for NTGCs in the upcoming LHC runs, their current limits and estimates for the expected sensitivity of the high-luminosity LHC.
