Probe of the Anomalous Quartic Couplings with Beam Polarization at the CLIC

A Senol,M Köksal,S C İnan

doi:10.1155/2017/6970587

Abstract

We have investigated the anomalous quartic couplings defined by the dimension-8 operators in semileptonic decay channel of thee+e-→νeW-W+ν-eprocess for unpolarized and polarized electron (positron) beam at the Compact Linear Collider. We give the 95% confidence level bounds on the anomalousfS0/Λ4,fS1/Λ4, andfT0/Λ4couplings for various values of the integrated luminosities and center-of-mass energies. The best sensitivities obtained on anomalousfS0/Λ4,fS1/Λ4, andfT0/Λ4couplings through the processe+e-→νeW-W+ν-ewith beam polarization ats=3 TeV and an integrated luminosity ofLint=2000 fb-1are[-4.05;3.67]×10-12 GeV-4,[-3.08;2.12]×10-12 GeV-4, and[-1.98;0.64]×10-13 GeV-4, which show improvement over the current bounds.

Highlights

The Standard Model (SM) has been proven to be highly successful through many significant experimental tests, in particular the discovery of a new particle consistent with the SM Higgs boson with a mass between 125 − 126 GeV detected by the ATLAS and the CMS experiments at the LHC [1, 2]
The existence of anomalous gauge boson couplings may be a sign of new physics beyond the SM
The anomalous quartic gauge boson couplings can be examined with the aid of the effective Lagrangian approach

Summary

INTRODUCTION

The Standard Model (SM) has been proven to be highly successful through many significant experimental tests, in particular the discovery of a new particle consistent with the SM Higgs boson with a mass between 125 − 126 GeV detected by the ATLAS and the CMS experiments at the LHC [1, 2]. High-dimensional effective operators describing the anomalous quartic gauge boson couplings are expressed by either linear or nonlinear effective Lagrangians. It becomes important to study the anomalous quartic gauge boson couplings based on linear effective Lagrangians due to the discovery of a Higgs boson in the LHC. For these reasons, we only deal with dimension-8 operators in our work. We will analyze the anomalous quartic couplings via e+e− → νeW −W +νe process with semi-leptonic decay including polarized electron (positron) beam effects at the CLIC for the center-of-mass energies of 1.4 and 3 TeV

DIMENSION-EIGHT OPERATORS FOR QUARTIC GAUGE COUPLINGS

NUMERICAL ANALYSIS

CONCLUSIONS

Conflict of Interest