TY - JOUR
T1 - Model with a gauged lepton flavor SU(2) symmetry
AU - Chiang, Cheng Wei
AU - Tsumura, Koji
N1 - Funding Information:
CWC would like to thank the hospitality of the Particle Physics Group of Kyoto University, where this work was initiated during his visit. This research of CWC was supported in part by the Ministry of Science and Technology of Taiwan under Grant No. MOST 104-2628-M-002-014-MY4. The work of KT is supported by JSPS Grant-in-Aid for Young Scientists (B) (Grant No. 16K17697), by the MEXT Grant-in-Aid for Scientific Research on Innovation Areas (Grant No. 16H00868), and by Kyoto University: Supporting Program for Interaction-based Initiative Team Studies (SPIRITS). The work of CWC and KT are also supported by JSPS Joint Research Projects (Collaboration, Open Partnership), “New Frontier of neutrino mass generation mechanisms via Higgs physics at LHC and flavor physics.”
Publisher Copyright:
© 2018, The Author(s).
PY - 2018/5/1
Y1 - 2018/5/1
N2 - We propose a model having a gauged SU(2) symmetry associated with the second and third generations of leptons, dubbed SU(2)μτ, of which U(1)Lμ−Lτ is an Abelian subgroup. In addition to the Standard Model fields, we introduce two types of scalar fields. One exotic scalar field is an SU(2)μτdoublet and SM singlet that develops a nonzero vacuum expectation value at presumably multi-TeV scale to completely break the SU(2)μτsymmetry, rendering three massive gauge bosons. At the same time, the other exotic scalar field, carrying electroweak as well as SU(2)μτcharges, is induced to have a nonzero vacuum expectation value as well and breaks mass degeneracy between the muon and tau. We examine how the new particles in the model contribute to the muon anomalous magnetic moment in the parameter space compliant with the Michel decays of tau.
AB - We propose a model having a gauged SU(2) symmetry associated with the second and third generations of leptons, dubbed SU(2)μτ, of which U(1)Lμ−Lτ is an Abelian subgroup. In addition to the Standard Model fields, we introduce two types of scalar fields. One exotic scalar field is an SU(2)μτdoublet and SM singlet that develops a nonzero vacuum expectation value at presumably multi-TeV scale to completely break the SU(2)μτsymmetry, rendering three massive gauge bosons. At the same time, the other exotic scalar field, carrying electroweak as well as SU(2)μτcharges, is induced to have a nonzero vacuum expectation value as well and breaks mass degeneracy between the muon and tau. We examine how the new particles in the model contribute to the muon anomalous magnetic moment in the parameter space compliant with the Michel decays of tau.
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U2 - 10.1007/JHEP05(2018)069
DO - 10.1007/JHEP05(2018)069
M3 - Article
AN - SCOPUS:85046999102
SN - 1126-6708
VL - 2018
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 5
M1 - 69
ER -