Flavoured B−L local symmetry and anomalous rare B decays
We consider a flavoured B−L gauge symmetry under which only the third generation fermions are charged. Such a symmetry can survive at low energies (∼TeV) while still allowing for two superheavy right-handed neutrinos, consistent with neutrino masses via see-saw and leptogenesis. We describe a mechan...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-11-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317308390 |
| _version_ | 1831749058123792384 |
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| author | Rodrigo Alonso Peter Cox Chengcheng Han Tsutomu T. Yanagida |
| author_facet | Rodrigo Alonso Peter Cox Chengcheng Han Tsutomu T. Yanagida |
| author_sort | Rodrigo Alonso |
| collection | DOAJ |
| description | We consider a flavoured B−L gauge symmetry under which only the third generation fermions are charged. Such a symmetry can survive at low energies (∼TeV) while still allowing for two superheavy right-handed neutrinos, consistent with neutrino masses via see-saw and leptogenesis. We describe a mechanism for generating Yukawa couplings in this model and also discuss the low-energy phenomenology. Interestingly, the new gauge boson could explain the recent hints of lepton universality violation at LHCb, with a gauge coupling that remains perturbative up to the Planck scale. Finally, we discuss more general U(1) symmetries and show that there exist only two classes of vectorial U(1) that are both consistent with leptogenesis and remain phenomenologically viable at low-energies. |
| first_indexed | 2024-12-21T22:02:44Z |
| format | Article |
| id | doaj.art-879aa3e299524e38ae0a782df92b0f3d |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-21T22:02:44Z |
| publishDate | 2017-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-879aa3e299524e38ae0a782df92b0f3d2022-12-21T18:48:46ZengElsevierPhysics Letters B0370-26931873-24452017-11-01774C64364810.1016/j.physletb.2017.10.027Flavoured B−L local symmetry and anomalous rare B decaysRodrigo Alonso0Peter Cox1Chengcheng Han2Tsutomu T. Yanagida3CERN, Theoretical Physics Department, CH-1211 Geneva 23, SwitzerlandKavli IPMU (WPI), UTIAS, University of Tokyo, Kashiwa, Chiba 277-8583, JapanKavli IPMU (WPI), UTIAS, University of Tokyo, Kashiwa, Chiba 277-8583, JapanKavli IPMU (WPI), UTIAS, University of Tokyo, Kashiwa, Chiba 277-8583, JapanWe consider a flavoured B−L gauge symmetry under which only the third generation fermions are charged. Such a symmetry can survive at low energies (∼TeV) while still allowing for two superheavy right-handed neutrinos, consistent with neutrino masses via see-saw and leptogenesis. We describe a mechanism for generating Yukawa couplings in this model and also discuss the low-energy phenomenology. Interestingly, the new gauge boson could explain the recent hints of lepton universality violation at LHCb, with a gauge coupling that remains perturbative up to the Planck scale. Finally, we discuss more general U(1) symmetries and show that there exist only two classes of vectorial U(1) that are both consistent with leptogenesis and remain phenomenologically viable at low-energies.http://www.sciencedirect.com/science/article/pii/S0370269317308390 |
| spellingShingle | Rodrigo Alonso Peter Cox Chengcheng Han Tsutomu T. Yanagida Flavoured B−L local symmetry and anomalous rare B decays Physics Letters B |
| title | Flavoured B−L local symmetry and anomalous rare B decays |
| title_full | Flavoured B−L local symmetry and anomalous rare B decays |
| title_fullStr | Flavoured B−L local symmetry and anomalous rare B decays |
| title_full_unstemmed | Flavoured B−L local symmetry and anomalous rare B decays |
| title_short | Flavoured B−L local symmetry and anomalous rare B decays |
| title_sort | flavoured b l local symmetry and anomalous rare b decays |
| url | http://www.sciencedirect.com/science/article/pii/S0370269317308390 |
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