TeV scale horizontal gauge symmetry and its implications in B-physics

Aug, 2010
20 pages
Published in:
  • Phys.Rev.D 82 (2010) 114003
e-Print:
Report number:
  • IPMU10-0115

Citations per year

201020122014201620175301
Abstract: (arXiv)
We propose a gauged U(1)HU(1)_{H} horizontal symmetry around TeV scale that is a subgroup of a SU(3)HSU(3)_{H} horizontal gauge symmetry broken at {\cal O}(10^{14}) \GeV. The breaking generates right-handed Majorana neutrino masses through a SU(3)HSU(3)_H sextet scalar. A particular Majorana right-handed neutrino mass matrix explicitly determines the remnant U(1)HU(1)_{H} at low energy which only couples to bsb-s and μτ\mu-\tau in the gauge eigenstate. The dangerous KKˉK-\bar{K}, DDˉD-\bar{D} mixing and Bsμ+μB_s \rightarrow \mu^+ \mu^- 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 BsB_{s} and BdB_{d} mixing while keeping all the other experimental constraints within 90 \% C. L. For the BB meson decay, the Bsμ±τB_{s}\to \mu^{\pm}\tau^{\mp} is the leading leptonic decay channel which is several orders of magnitude below current experimental bound.
  • 14.60.Pq
  • 13.20.He
  • 14.40.Nd
  • bottom meson: decay
  • symmetry: gauge
  • neutrino: right-handed
  • Batavia TEVATRON Coll
  • horizontal symmetry: symmetry breaking
  • neutrino: Majorana
  • neutrino: mixing
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