Abstract
We perform an exclusive study on the feebly interacting massive particle dark matter candidate in an extended hyperchargeless ($Y=0$) Higgs triplet model. The additional ${Z}_{2}$ odd neutral fermion singlet plays the role of dark matter with support from two other vectorlike fermion doublets. The mixing between the neutral component of a doublet and singlet fermions controls the current relic density through the freeze-in mechanism, whereas the additional doublet fermion helps to get the neutrino mass and mixing angles. We obtain a broad region of the parameter spaces satisfying the current relic density and neutrino mass and mixing angles.
Highlights
Through meticulous measurements of cosmic microwave background (CMB) anisotropies, cosmology based experiments such as PLANCK [1] and WMAP [2] have suggested the existence of dark matter (DM), giving rise to around 26% of the present Universe’s energy density
The cosmological and astrophysical data can only explain how much dark matter there is in the Universe, but to understand what it is one must look at the data from the particle physics perspective
The Muon g-2 Collaboration at Fermilab reported a staggering measurement of the anomalous magnetic dipole moment of μÆ with a 3.3σ deviation from the SM prediction achieving a combined experimental average of [48,49,50] δaμ 1⁄4 aeμxp − aSμM 1⁄4 ð2.51 Æ 0.59Þ × 10−9. This gives new hope in the beyond the standard model (BSM) physics for a long-standing tension between the SM and experimental data that was previously reported by the E821 experiment at Brookhaven National Laboratory [51], and it gets serious attention quickly [52,53,54,55,56,57,58,59,60,61,62,63]
Summary
Through meticulous measurements of cosmic microwave background (CMB) anisotropies, cosmology based experiments such as PLANCK [1] and WMAP [2] have suggested the existence of dark matter (DM), giving rise to around 26% of the present Universe’s energy density. This gives new hope in the BSM physics for a long-standing tension between the SM and experimental data that was previously reported by the E821 experiment at Brookhaven National Laboratory [51], and it gets serious attention quickly [52,53,54,55,56,57,58,59,60,61,62,63] To explain these data, one can alternatively use the lattice QCD—the hadronic vacuum polarization contribution to the muon anomalous magnetic moment based on gauge ensembles with Nf 1⁄4 2 þ 1 flavors of OðaÞ improved Wilson quarks [64,65,66,67]. We find that Higgs triplet and vectorlike fermions in this model can explain a large region of the dark matter parameter spaces including the neutrino low-energy variables, allowed by all theoretical and experimental constants. The doublet and triplet scalar are conventionally written as [43,70,71]
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