Search For Anomalous Trilinear Couplings Of Electroweak Gauge Bosons Using Angular Variables At √s = 13 Tev At Cms

A study of techniques for improving limits placed on anomalous trilinear couplings of electroweakgauge bosons is presented. Electroweak gauge bosons couple to one another as well as to fermions. Deviations of these couplings from their standard model values would be a sign of new physics. Parametersthat affect the couplings of the gauge bosons to each other also affect their helicity, which in turn maybe measured from their decay products. Angles between the decay planes of the gauge bosons, as well asbetween their decay products, are measured. The analysis uses 35.9 fb −1 of proton-proton collision datafrom the LHC taken with the CMS detector. Building on a prior analysis that measured the fiducial crosssection of pp → W W/W Z → lνjj, we show that angular variables can improve limits on anomalouscouplings even further.