TY - JOUR
T1 - TeV scale horizontal gauge symmetry and its implications in B physics
AU - Park, Seong Chan
AU - Shu, Jing
AU - Wang, Kai
AU - Yanagida, Tsutomu T.
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2010/12/2
Y1 - 2010/12/2
N2 - We propose a gauged U(1)H horizontal symmetry around a TeV scale that is a subgroup of a SU(3)H horizontal gauge symmetry broken at O(1014)GeV. The breaking generates right-handed Majorana neutrino masses through a SU(3)H sextet scalar. A particular Majorana right-handed neutrino mass matrix explicitly determines the remnant U(1)H at low energy which only couples to b-s and μ-τ in the gauge eigenstate. The dangerous K-K̄, D-D̄ mixing and Bs→μ+μ - are kept to be safe because the relevant couplings are suppressed through high powers of small mixing angles in the fermion rotation matrix. Our analysis which applies to the general case shows that the Tevatron di-muon anomaly can be explained through the Bs and Bd mixing while keeping all the other experimental constraints within 90% C.L. For the B meson decay, the Bs→μ⊃±τ⊃ is the leading leptonic decay channel which is several orders of magnitude below current experimental bounds.
AB - We propose a gauged U(1)H horizontal symmetry around a TeV scale that is a subgroup of a SU(3)H horizontal gauge symmetry broken at O(1014)GeV. The breaking generates right-handed Majorana neutrino masses through a SU(3)H sextet scalar. A particular Majorana right-handed neutrino mass matrix explicitly determines the remnant U(1)H at low energy which only couples to b-s and μ-τ in the gauge eigenstate. The dangerous K-K̄, D-D̄ mixing and Bs→μ+μ - are kept to be safe because the relevant couplings are suppressed through high powers of small mixing angles in the fermion rotation matrix. Our analysis which applies to the general case shows that the Tevatron di-muon anomaly can be explained through the Bs and Bd mixing while keeping all the other experimental constraints within 90% C.L. For the B meson decay, the Bs→μ⊃±τ⊃ is the leading leptonic decay channel which is several orders of magnitude below current experimental bounds.
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U2 - 10.1103/PhysRevD.82.114003
DO - 10.1103/PhysRevD.82.114003
M3 - Article
AN - SCOPUS:78651319616
VL - 82
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 11
M1 - 114003
ER -