DARK MATTER FERMION PRODUCTION AT LEPTON COLLIDERS VIA PHOTON - DARK PHOTON - PHOTON EXCHANGE

Tóm tắt

The dark matter fermion production has studied at lepton colliders via
photon-dark photon-photon exchange, the results show that, the  production
cross-section at e e   collider is the same as at     collider when the initial
beams are unpolarized or both the initial beams are left- or right-polarized. In case
of mix between both the initial beams are left-polarized with both the initial beams
are right-polarized, the       cross-section is very much bigger than the
e e     cross-section, and the cross-section strongly depends on the
polarization of initial beams.