Using LZ nuclear recoil data, the authors derive 90% CL exclusion limits on cosmic-ray-boosted sub-GeV dark matter for two U(1)' mediator models, with energy-dependent cross sections improving the lower reach versus constant cross section.
Search for invisible dark photon in $\gamma e$ scattering at future lepton colliders
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abstract
For the first time, the production of a massive dark photon (DP) in the $\gamma e^-$ scattering at the future lepton colliders ILC, CLIC, and CEPC is examined. The invisible decay mode of the DP is addressed. We have studied both the unpolarized scattering and the collision of the Compton backscattered photons with the polarized electron. The missing energy distributions are shown. We have considered the wide range 10 GeV -- 1000 GeV of the DP mass $m_{A'}$. The excluded regions at the 95\% C.L. in the plane $(\varepsilon, m_{A'})$, where $\varepsilon$ is the kinetic mixing parameter, are obtained.
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A congruous approach with realistic cross section towards limiting sub-GeV dark matter from LUX-ZEPLIN
Using LZ nuclear recoil data, the authors derive 90% CL exclusion limits on cosmic-ray-boosted sub-GeV dark matter for two U(1)' mediator models, with energy-dependent cross sections improving the lower reach versus constant cross section.