Inverse seesaw accompanied by Dirac fermionic dark matter
We present an inverse seesaw mechanism by resorting to a U(1)B−L gauge symmetry. In order to cancel the gauge anomalies, we introduce nine neutral fermions among which six participate in the inverse seesaw, while the other three form a Dirac fermion and a massless fermion. In this inverse seesaw, th...
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| Published in | Physics letters. B Vol. 806; p. 135499 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
10.07.2020
Elsevier |
| Online Access | Get full text |
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| Summary: | We present an inverse seesaw mechanism by resorting to a U(1)B−L gauge symmetry. In order to cancel the gauge anomalies, we introduce nine neutral fermions among which six participate in the inverse seesaw, while the other three form a Dirac fermion and a massless fermion. In this inverse seesaw, three neutral fermions are the usual right-handed neutrinos while the other three have a small Majorana mass term. An additional seesaw mechanism for generating these small Majorana masses also explains the cosmic baryon asymmetry in association with the sphaleron processes. The Dirac fermion becomes a stable dark matter while the massless fermion decouples early. |
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| ISSN: | 0370-2693 1873-2445 |
| DOI: | 10.1016/j.physletb.2020.135499 |