Regular Article - Theoretical Physics
Effects of new heavy fermions on complex scalar dark matter phenomenology in gauged two Higgs doublet model
School of Physics and Center of Excellence in High Energy Physics and Astrophysics, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand
2 Physics Division, National Center for Theoretical Sciences, National Tsing-Hua University, 30013, Hsinchu, Taiwan
Accepted: 25 January 2022
Published online: 15 February 2022
We study the inclusion of new heavy fermions on complex scalar dark matter (DM) phenomenology within gauged two Higgs doublet model (G2HDM). We find that for DM mass above 1 TeV, heavy quarks coannihilations into the Standard Model (SM) quarks and gluons dominate the thermally-averaged cross section relevant for the relic abundance of complex scalar DM. We demonstrate that the effects of QCD Sommerfeld correction as well as QCD bound state formation in determining the DM relic density are negligible. We show that the allowed parameter space is significantly constrained by the current PLANCK relic density data as well as XENON1T limit appropriate for DM direct search.
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