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Singlet fermionic dark matter with Veltman conditions
- Source :
- Physics Letters B, Vol 782, Iss, Pp 316-323 (2018), Physics Letters
- Publication Year :
- 2018
-
Abstract
- We reexamine a renormalizable model of a fermionic dark matter with a gauge singlet Dirac fermion and a real singlet scalar which can ameliorate the scalar mass hierarchy problem of the Standard Model (SM). Our model setup is the minimal extension of the SM for which a realistic dark matter (DM) candidate is provided and the cancellation of one-loop quadratic divergence to the scalar masses can be achieved by the Veltman condition (VC) simultaneously. This model extension, although renormalizable, can be considered as an effective low-energy theory valid up to cut-off energies about 10 TeV. We calculate the one-loop quadratic divergence contributions of the new scalar and fermionic DM singlets, and constrain the model parameters using the VC and the perturbative unitarity conditions. Taking into account the invisible Higgs decay measurement, we show the allowed region of new physics parameters satisfying the recent measurement of relic abundance. With the obtained parameter set, we predict the elastic scattering cross section of the new singlet fermion into target nuclei for a direct detection of the dark matter. We also perform the full analysis with arbitrary set of parameters without the VC as a comparison, and discuss the implication of the constraints by the VC in detail.<br />11 pages, 15 figures, title changed, discussion on running couplings added, journal version
- Subjects :
- Physics
Nuclear and High Energy Physics
Particle physics
Unitarity
010308 nuclear & particles physics
Physics beyond the Standard Model
Scalar (mathematics)
Dark matter
High Energy Physics::Phenomenology
FOS: Physical sciences
Fermion
01 natural sciences
lcsh:QC1-999
Standard Model
High Energy Physics - Experiment
symbols.namesake
High Energy Physics - Experiment (hep-ex)
High Energy Physics - Phenomenology
High Energy Physics - Phenomenology (hep-ph)
Dirac fermion
0103 physical sciences
symbols
Higgs boson
010306 general physics
lcsh:Physics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Physics Letters B, Vol 782, Iss, Pp 316-323 (2018), Physics Letters
- Accession number :
- edsair.doi.dedup.....e0c93e2be04554aa4e89339aa0c45c4f