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Gauged lepton flavour

delete2016-12-22
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R
Rodrigo Alonso *
E
E. Fernández-Martínez
M
M.B. Gavela
B
Benjaḿın Grinstein
L
Luca Merlo
P
Pablo Quílez
DOI:10.1007/JHEP12(2016)119delete
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Abstract

Abstract

En 中文
The gauging of the lepton flavour group is considered in the Standard Model context and in its extension with three right-handed neutrinos. The anomaly cancellation conditions lead to a Seesaw mechanism as underlying dynamics for all leptons; requiring in addition a phenomenologically viable setup leads to Majorana masses for the neutral sector: the type I Seesaw Lagrangian in the Standard Model case and the inverse Seesaw in the extended model. Within the minimal extension of the scalar sector, the Yukawa couplings are promoted to scalar fields in the bifundamental of the flavour group. The resulting low-energy Yukawa couplings are proportional to inverse powers of the vacuum expectation values of those scalars; the protection against flavour changing neutral currents differs from that of Minimal Flavour Violation. In all cases, the mu-tau flavour sector exhibits rich and promising phenomenological signals.
Keywords:
Beyond Standard Model
Gauge Symmetry
Neutrino Physics
Spontaneous Symmetry Breaking
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Journal

Journal of High Energy Physics cover
Journal of High Energy Physics
IF:
5.5
Papers:
3.9W
Citations:
13.7W

Organization

University of California System cover
University of California System
Scholars:
37.5W
Papers: 33.7W
Citations: 6.6K
U
University of California San Diego
Scholars:
4.6W
Papers: 3.5W
Citations: 924