Study The Anomalous Quartic Gauge Couplings Via The Exclusive γγ→W⁺W^-Scattering

Because experiments have not been able to discover any new particles beyond the Standard Model,the general approach to study new interactions,Standard Model Effective Field Theory（SMEFT）,is gradually being favored by theoretical and experimental studies.In general,six-dimensional operators produce the largest contribution to new physics effects,but in some special processes,the leading-order contribution to new physics is produced in dimension-8 operators.Vector boson scattering（VBS）is one process that is sensitive to dimension-8 operators induced by the anomalous quartic gauge couplings（aQGC）.It is an excellent window for probing new physics because of its sensitivity to electroweak and Higgs physics.We study the dimension-8 operators contributing to the anomalous γγ→WW coupling via the exclusiveγγ→W+W-scattering.By analysing the kinematical features of the signals,we propose an event selection strategy to highlight the aQGC contributions.The statistical significances of the signals at 13 and 14 TeV LHC with current luminosity are obtained.The γγ→ W+Wscattering is found to be sensitive to OMi operators which is suitable for detecting new physics induced by M-type operators.The constraints on the operator coefficients that we can obtain by simulating the LHC at the current luminosity are more stringent than the existing experimental limit at 8 TeV and can improve the constraints by about one order of magnitude.