Investigation of neutralino pair production in photon-photon collider at the ILC

Abstract

Neutralino pair production via photon-photon collision is analyzed in the context of the minimal supersymmetric standard model at a future linear collider. Since the photon does not have self- coupling, this process is only possible at next-to-leading order (NLO), and all the possible diagrams are calculated for the photon-photon interaction, including box, triangle, and quartic coupling diagrams. Numerical analysis of the production rates for ${\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{1}^{0}{\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{1}^{0}$, ${\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{1}^{0}{\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{2}^{0}$ and ${\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{2}^{0}{\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{2}^{0}$ are presented for four new distinct benchmark models which are presented in the light of LHC8. Angular dependence of each neutralino pair for the benchmark points is also analyzed. Total integrated photonic cross section goes up to 1.43 fb for the ${\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{2}^{0}{\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{2}^{0}$ pairs at $\sqrt{s}=1\text{ }\text{ }\mathrm{TeV}$ for the radiatively driven natural supersymmetric benchmark point.