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Constraining nonminimal dark sector scenarios with the COHERENT neutrino scattering data

2023    Elpe, A.; Akyumuk, E.; Aliev, T. M.; Selbuz, L.; Turan, I.

Abelian dark sector scenarios embedded into the two-Higgs doublet model are scrutinized within the coherent elastic neutrino-nucleus scattering experiment, which was first measured by the COHERENT Collaboration in 2017 with an ongoing effort to improve it since then and recently released data for the CsI target in 2022. In the theoretical framework, it is assumed that there is a $U\left(1\right)$ gauge group in the dark sector with a nonzero kinetic mixing with the hypercharge field. The COHERENT data for the targets CsI and liquid argon are treated in both single and multibin bases to constrain the multidimensional parameter space, spanned by the dark gauge coupling, kinetic mixing parameter and the dark photon mass, of totally seven different representative scenarios which are also compared and contrasted among each other to find out about the most sensitive one to the data. The effect of refined quenching factor is also addressed.