Speaker
Description
We propose a two-component fermionic Dark Matter(DM) in a minimal
U(1)B extension of Standard Model(SM) with the inclusion of one complex
scalar S(1, 1, 0, −3) along with the usual Higgs doublet. Out of the 3 exotic
fermions added for anomaly cancellation, DM emerges as a mixture of the neutral component of the fermionic doublet and a singlet fermion. The motivation of
our work lies in the fact that in the case of one-component DM candidate, the
spin-independent direct-detection(SIDD) cross-section comes out to be larger
than the experimental bounds and is thus ruled out. So, in this work, we take
two-component singlet-doublet fermionic Dark Matter, where a mixing angle(θ)
dependent term between final mass eigenstates of DM particles can significantly
relax the SIDD cross-section to within the experimental limits with the right
choice of mixing angle. In the model, U(1)B symmetry is broken by the scalar
S and a reminent Z2 symmetry ensures the stability of DM candidates. The
model thus offers a viable parameter space for a stable DM candidate that can
be probed from direct search, collider, and GW experiments.
| Session | Astroparticle Physics and Cosmology |
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