(sub)GeV dark matter in the U(1)X Higgs portal model

(sub)GeV dark matter in the U(1)X Higgs portal model

Blog Article

In this research we consider a FACE TONER U(1)X gauge boson acting as a dark matter candidate.The vector dark matter (DM) gets mass when a complex singlet scalar breaks the gauge symmetry spontaneously, adding a second Higgs boson to the spectra.The dark matter candidates communicate with the SM particles via a scalar-Higgs portal.In this work, we concentrate on the masses of the vector dark matter and the scalar mediator below 10 GeV, aka light dark matter.Although we assume thermal freeze-out for the vector DM using the zero-moment of the full Boltzmann equation to calculate the relic abundance, Lenses we explore the effects of the second-moment when the vector DM annihilates resonantly.

As typically light DM is highly sensitive to CMB bounds, we focus on two thermal mechanisms which alleviate this bound: dark matter annihilation via forbidden channels and near a pole.Other bounds from colliders, thermalization conditions, beam-dump experiments, and astrophysical observations are imposed.Taking into account all the bounds including the direct detection upper limits, the viable space is achieved.