Dark matter and muon (g−2) in local U(1)Lμ−Lτ-extended Ma model
We consider right-handed neutrino dark matter N1 in local U(1)Lμ−Lτ-extended Ma model. With the light U(1)μ−τ gauge boson (mZ′∼O(100) MeV) and small U(1)μ−τ gauge coupling (gZ′∼10−4–10−3) which can accommodate the muon (g−2) anomaly and is still allowed by other experimental constraints, we show tha...
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| Format: | Article |
| Language: | English |
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Elsevier
2016-05-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269316001581 |
| Summary: | We consider right-handed neutrino dark matter N1 in local U(1)Lμ−Lτ-extended Ma model. With the light U(1)μ−τ gauge boson (mZ′∼O(100) MeV) and small U(1)μ−τ gauge coupling (gZ′∼10−4–10−3) which can accommodate the muon (g−2) anomaly and is still allowed by other experimental constraints, we show that we can get correct relic density of dark matter for wide range of dark matter mass (M1∼10–200 GeV), although the gauge coupling constant gZ′ is small. This is due to the fact that the annihilation cross section of dark matter pair is enhanced by M14/mZ′4 in the processes N1N1→Z′Z′ or N1N1→Z′H2. We also consider the constraints from direct detection, collider searches. |
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| ISSN: | 0370-2693 1873-2445 |