Seminarium "Teoria cząstek elementarnych i kosmologia"

Vector Boson Scattering (VBS) processes are regarded as the best lab to study the VVVV interactions, where V = W, Z. We take the Effective Field Theory (EFT) approach to parametrize potential effects from New Physics (NP). The approach, although common, undergoes consistency constraints particularly severe when the VV invariant mass is not resolved experimentally. We (i) discuss and present constraints on effective vertices based on LHC run 2 dataset and (ii) study perspectives for discovery reach of NP at HL-LHC.In both aspects the EFT consistency conditions play a crucial role and influence the results significantly. Presented conclusions on EFT validity conditions may also be relevant in processes other than VBS, that feature broad energy spectrum, e.g. di-boson or di-jet production at LHC.
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