Gauged lepton flavour

Alonso, Rodrigo; Fernandez Martinez, Enrique; Gavela, M. B.; Grinstein, B.; Merlo, Luca; Quilez, Pablo

doi:10.1007/JHEP12(2016)119

Title: Gauged lepton flavour

Journal Article · Wed Dec 21 23:00:00 EST 2016 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/JHEP12(2016)119 · OSTI ID:1368036

Alonso, Rodrigo ^[1]; Fernandez Martinez, Enrique ^[2]; Gavela, M. B. ^[2]; Grinstein, B. ^[3]; Merlo, Luca ^[2]; Quilez, Pablo ^[2]

Univ. of California, San Diego, CA (United States). Dept. of Physics; European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theory Division; University of California, San Diego
Autonomous Univ. of Madrid (Spain). Dept. of Theoretical Physics and Inst. of Theoretical Physics
Univ. of California, San Diego, CA (United States). Dept. of Physics

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; in addition, it requires a phenomenologically viable setup which 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 every case, the μ - τ flavour sector exhibits rich and promising phenomenological signals.

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Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0009919

OSTI ID:: 1368036

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 12 Vol. 2016; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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