Z′ Portal Dark Matter in the Minimal B-L Model
We consider a dark matter scenario in the context of the minimal extension of the Standard Model (SM) with a B-L (baryon number minus lepton number) gauge symmetry, where three right-handed neutrinos with a B-L charge -1 and a B-L Higgs field with a B-L charge +2 are introduced to make the model ano...
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Wiley
2018-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2018/5340935 |
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| author | Satomi Okada |
| author_facet | Satomi Okada |
| author_sort | Satomi Okada |
| collection | DOAJ |
| description | We consider a dark matter scenario in the context of the minimal extension of the Standard Model (SM) with a B-L (baryon number minus lepton number) gauge symmetry, where three right-handed neutrinos with a B-L charge -1 and a B-L Higgs field with a B-L charge +2 are introduced to make the model anomaly-free and to break the B-L gauge symmetry, respectively. The B-L gauge symmetry breaking generates Majorana masses for the right-handed neutrinos. We introduce a Z2 symmetry to the model and assign an odd parity only for one right-handed neutrino, and hence the Z2-odd right-handed neutrino is stable and the unique dark matter candidate in the model. The so-called minimal seesaw works with the other two right-handed neutrinos and reproduces the current neutrino oscillation data. We consider the case that the dark matter particle communicates with the SM particles through the B-L gauge boson (ZB-L′ boson) and obtain a lower bound on the B-L gauge coupling (αB-L) as a function of the ZB-L′ boson mass (mZ′) from the observed dark matter relic density. On the other hand, we interpret the recent LHC Run-2 results on the search for a Z′ boson resonance to an upper bound on αB-L as a function of mZ′. These two constraints are complementary for narrowing down an allowed parameter region for this “Z′ portal” dark matter scenario, leading to a lower mass bound of mZ′≥3.9 TeV. |
| format | Article |
| id | doaj-art-4d916dc77e594417b770c686e5a728e0 |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-4d916dc77e594417b770c686e5a728e02025-02-03T01:00:26ZengWileyAdvances in High Energy Physics1687-73571687-73652018-01-01201810.1155/2018/53409355340935Z′ Portal Dark Matter in the Minimal B-L ModelSatomi Okada0Graduate School of Science and Engineering, Yamagata University, Yamagata 990-8560, JapanWe consider a dark matter scenario in the context of the minimal extension of the Standard Model (SM) with a B-L (baryon number minus lepton number) gauge symmetry, where three right-handed neutrinos with a B-L charge -1 and a B-L Higgs field with a B-L charge +2 are introduced to make the model anomaly-free and to break the B-L gauge symmetry, respectively. The B-L gauge symmetry breaking generates Majorana masses for the right-handed neutrinos. We introduce a Z2 symmetry to the model and assign an odd parity only for one right-handed neutrino, and hence the Z2-odd right-handed neutrino is stable and the unique dark matter candidate in the model. The so-called minimal seesaw works with the other two right-handed neutrinos and reproduces the current neutrino oscillation data. We consider the case that the dark matter particle communicates with the SM particles through the B-L gauge boson (ZB-L′ boson) and obtain a lower bound on the B-L gauge coupling (αB-L) as a function of the ZB-L′ boson mass (mZ′) from the observed dark matter relic density. On the other hand, we interpret the recent LHC Run-2 results on the search for a Z′ boson resonance to an upper bound on αB-L as a function of mZ′. These two constraints are complementary for narrowing down an allowed parameter region for this “Z′ portal” dark matter scenario, leading to a lower mass bound of mZ′≥3.9 TeV.http://dx.doi.org/10.1155/2018/5340935 |
| spellingShingle | Satomi Okada Z′ Portal Dark Matter in the Minimal B-L Model Advances in High Energy Physics |
| title | Z′ Portal Dark Matter in the Minimal B-L Model |
| title_full | Z′ Portal Dark Matter in the Minimal B-L Model |
| title_fullStr | Z′ Portal Dark Matter in the Minimal B-L Model |
| title_full_unstemmed | Z′ Portal Dark Matter in the Minimal B-L Model |
| title_short | Z′ Portal Dark Matter in the Minimal B-L Model |
| title_sort | z portal dark matter in the minimal b l model |
| url | http://dx.doi.org/10.1155/2018/5340935 |
| work_keys_str_mv | AT satomiokada zportaldarkmatterintheminimalblmodel |