Study of anomalous $WW\gamma \gamma$ coupling sensitivity at the Compact Linear Collider

Abstract

The Compact Linear Collider (CLIC) is one of the most popular linear colliders, planned to realize $e^{-}{e}^{+}$ collisions in three energy stages of $0.5$, $1.5$, and $3$ TeV. It has an energy scale never reached by any existing lepton collider. In this study, we present the sensitivity studies of the $WW\gamma \gamma$ anomalous quartic gauge boson coupling (aQGC) in the three different processes $e^{+}{e}^{-}\to W^{-}{W}^{+}\gamma$, $e^{+}{e}^{-}\to e^{+}{\gamma }^{\ast }{e}^{-}\to e^{+}{W}^{-}\gamma {\nu }_e$, and $e^{+}{e}^{-}\to e^{+}{\gamma }^{\ast }{\gamma }^{\ast }{e}^{-}\to e^{+}{W}^{-}{W}^{+}{e}^{-}$ at the CLIC. We obtained $95\%$ confidence level limits on the aQGC parameters $\frac{a_0}{{\Lambda }^2}$ and $\frac{a_c}{{\Lambda }^2}$ at various integrated luminosities and center-of-mass energies. The best limits obtained on the aQGCs $\frac{a_0}{{\Lambda }^2}$ and $\frac{a_c}{{\Lambda }^2}$ in these processes are at the order of $10^{-2}$ TeV${}^{-2}$ and $10^{-1}$ TeV${}^{-2}$, respectively.

Comments: 21 pages, 14 figures, 4 tables.To appear in Modern Physics Letters A