Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct Detection
We study a gauge-singlet vector-like fermion hidden sector dark matter model, in which the communication between the dark matter and the visible standard model sector is via the Higgs-portal scalar-Higgs mixing and also via a hidden sector scalar with loop-level couplings to two gluons and also to t...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2017/8689270 |
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| author | Shrihari Gopalakrishna Tuhin Subhra Mukherjee |
| author_facet | Shrihari Gopalakrishna Tuhin Subhra Mukherjee |
| author_sort | Shrihari Gopalakrishna |
| collection | DOAJ |
| description | We study a gauge-singlet vector-like fermion hidden sector dark matter model, in which the communication between the dark matter and the visible standard model sector is via the Higgs-portal scalar-Higgs mixing and also via a hidden sector scalar with loop-level couplings to two gluons and also to two hypercharge gauge bosons induced by a vector-like quark. We find that the Higgs-portal possibility is stringently constrained to be small by the recent LHC di-Higgs search limits, and the loop induced couplings are important to include. In the model parameter space, we present the dark matter relic density, the dark-matter-nucleon direct detection scattering cross section, the LHC diphoton rate from gluon-gluon fusion, and the theoretical upper bounds on the fermion-scalar couplings from perturbative unitarity. |
| format | Article |
| id | doaj-art-445de5de455c4af294cd248757a80f36 |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-445de5de455c4af294cd248757a80f362025-02-03T06:42:15ZengWileyAdvances in High Energy Physics1687-73571687-73652017-01-01201710.1155/2017/86892708689270Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct DetectionShrihari Gopalakrishna0Tuhin Subhra Mukherjee1The Institute of Mathematical Sciences, HBNI, CIT Campus, Taramani, Chennai 600113, IndiaThe Institute of Mathematical Sciences, HBNI, CIT Campus, Taramani, Chennai 600113, IndiaWe study a gauge-singlet vector-like fermion hidden sector dark matter model, in which the communication between the dark matter and the visible standard model sector is via the Higgs-portal scalar-Higgs mixing and also via a hidden sector scalar with loop-level couplings to two gluons and also to two hypercharge gauge bosons induced by a vector-like quark. We find that the Higgs-portal possibility is stringently constrained to be small by the recent LHC di-Higgs search limits, and the loop induced couplings are important to include. In the model parameter space, we present the dark matter relic density, the dark-matter-nucleon direct detection scattering cross section, the LHC diphoton rate from gluon-gluon fusion, and the theoretical upper bounds on the fermion-scalar couplings from perturbative unitarity.http://dx.doi.org/10.1155/2017/8689270 |
| spellingShingle | Shrihari Gopalakrishna Tuhin Subhra Mukherjee Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct Detection Advances in High Energy Physics |
| title | Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct Detection |
| title_full | Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct Detection |
| title_fullStr | Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct Detection |
| title_full_unstemmed | Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct Detection |
| title_short | Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct Detection |
| title_sort | gauge singlet vector like fermion dark matter lhc diphoton rate and direct detection |
| url | http://dx.doi.org/10.1155/2017/8689270 |
| work_keys_str_mv | AT shriharigopalakrishna gaugesingletvectorlikefermiondarkmatterlhcdiphotonrateanddirectdetection AT tuhinsubhramukherjee gaugesingletvectorlikefermiondarkmatterlhcdiphotonrateanddirectdetection |