Search for the anomalous quartic gauge couplings through $Z\gamma$ production at $e^{-}{e}^{+}$ colliders

Abstract

Spontaneous breaking of the $SU(2{)}_L\times U(1{)}_Y$ electroweak symmetry of the Standard Model (SM) sets the constraints on triple gauge couplings and quartic gauge couplings. Therefore, the measurement of multiboson production in $e^{-}{e}^{+}$ collisions allows us to directly examine the SM predictions and perform indirect investigations of new physics beyond the SM. In this paper, we concentrate the process $e^{-}{e}^{+}\to e^{-}Z\gamma e^{+}$ with $Z$ boson decaying to neutrinos to investigate the anomalous quartic gauge couplings using the effective Lagrangian approach at the Compact Linear Collider (CLIC). We obtain the sensitivities on the anomalous $f_{Ti}/{\Lambda }^4$ ($i=0,2,5,6,7,8,9$) couplings taking into account the systematic uncertainties of $3,5\%$ at $95\%$ Confidence Level for the CLIC with $\sqrt{s}=3$ TeV. Our results show that the sensitivities on some anomalous couplings without systematic errors are up to two orders of magnitude better than the current experimental limits. Considering a realistic systematic uncertainty such as $5\%$ from possible experimental sources, the sensitivity of all anomalous quartic couplings gets worse by about $10\%$ compared to those without systematic uncertainty for the CLIC.

Comments: 23 Pages, 10 Figures, 2 Tables