Eur. Phys. J. Plus (2015) 130: 75
https://doi.org/10.1140/epjp/i2015-15075-7

Regular Article

Anomalous quartic ZZγγ couplings at the CLIC

Department of Optical Engineering, Cumhuriyet University, 58140, Sivas, Turkey

^* e-mail: mkoksal@cumhuriyet.edu.tr

Received: 19 August 2014
Revised: 7 March 2015
Accepted: 11 March 2015
Published online: 20 April 2015

Abstract

We study the sensitivity to anomalous quartic ZZγγ couplings through the processes e ⁺ e ⁻ → Z Z γ, e ⁺ e ⁻ → e ⁺γ^* e ⁻ → e ⁺ Z Z e ⁻ and e ⁺ e ⁻ → e ⁺γ^*γ^* e ⁻ → e ⁺ Z Z e ⁻ at the CLIC. We find 95% confidence level bounds on these coupling parameters defining by the dimension-six operators. The best bounds on the anomalous ZZγγ couplings among the three processes are obtained from e ⁺ e ⁻ → Z Z γ at a center-of-mass energy of 3 TeV and an integrated luminosity of 590 fb⁻¹. We show that the best bounds obtained on both the anomalous coupling parameters are of the order of 10⁻⁸ GeV⁻², significantly improving the current bounds.