Mono-γ production of a dark vector at future e^(+)e^(−) colliders

The associated production of a dark particle and photon,represented as a mono-γevent,is a promising channel to probe particle content and dynamics in the dark sector.In this study,we investigate the properties of the mono-γ production of vector dark matter at future e^(+)e^(−) colliders.Photon-like and Pauli operators as well as triple gauge boson interactions involving dark matter are considered in the framework of effective field theory.We show that,in comparison with the Pauli operator,the triple gauge boson couplings are significantly more interesting in high energy colliders.Beam polarization effects are also analyzed,and we show that the experimental sensitivities cannot be significantly enhanced because of the smaller luminosity.