Constraints on anomalous quartic gauge couplings via Wγjj production at the LHC  

作　　者：Yu-Chen Guo Ying-Ying Wang Ji-Chong Yang Chong-Xing Yue 郭禹辰;王莹莹;杨冀翀;岳崇兴(Department of Physics,Liaoning Normal University,Dalian 116029,China)

机构地区：[1]Department of Physics,Liaoning Normal University,Dalian 116029,China

出　　处：《Chinese Physics C》2020年第12期72-87,共16页中国物理C（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China (11905093, 11875157, 11947402);the Doctoral Start-up Foundation of Liaoning Province (2019-BS-154)

摘　　要：Vector boson scattering at the Large Hadron Collider(LHC)is sensitive to anomalous quartic gauge couplings(aQGCs).In this study,we investigate the aQGC contribution to Wγjj production at the LHC with√s=13 TeV in the context of an effective field theory(EFT).The unitarity bound is applied as a cut on the energy scale of this production process,which is found to have significant suppressive effects on signals.To enhance the statistical significance,we analyze the kinematic and polarization features of the aQGC signals in detail.We find that the polarization effects induced by aQGCs are unique and can discriminate the signals from the SM backgrounds well.With the proposed event selection strategy,we obtain the constraints on the coefficients of dimension-8 operators with current luminosity.The results indicate that the process pp→Wγjj is powerful for searching for the OM2,3,4,5 and OT5,6,7 operators.

关 键 词：anomalous quartic gauge coupling vector boson scattering Large Hadron Collider Standard Model effective field theory 

分 类 号：O572.214[理学—粒子物理与原子核物理]