Improved sensitivity on the electromagnetic dipole moments of the top quark in $\gamma \gamma$, $\gamma {\gamma }^{\ast }$ and ${\gamma }^{\ast }{\gamma }^{\ast }$ collisions at the CLIC

Abstract

We realize a phenomenological study to examine the sensitivity on the magnetic moment and electric dipole moment of the top quark through the processes $\gamma \gamma \to t\bar{t}$, $e\gamma \to e{\gamma }^{\ast }\gamma \to et\bar{t}$ and $e^{-}{e}^{+}\to e^{-}{\gamma }^{\ast }{\gamma }^{\ast }{e}^{+}\to e^{-}t\bar{t}{e}^{+}$ at the CLIC. We find that with a center-of-mass energy of the CLIC-1.4$TeV$, integrated luminosity of $\mathcal{L}=1500f{b}^{-1}$ and CLIC-3$TeV$, integrated luminosity of $\mathcal{L}=2000f{b}^{-1}$ with systematic uncertainties of ${\delta }_{sys}=0,5,10\%$ at the $95\%C.L.$, it is possible the CLIC may put limits on the electromagnetic dipole moments of the top quark ${\hat{a}}_V$ and ${\hat{a}}_A$ with a sensitivity of $\mathcal{O}(10^{-3}-10^{-2})$. Therefore, we show that the sensitivity with the CLIC data is much greater than that for the LHC data.

Comments: 23 pages, 11 figures and 7 tables