Z′and Lepton Flavor-Violation Tau Decays

  • There are many models beyond the standard model predicting the existence of non-universal gauge bosons Z′,which can give rise to very rich phenomena. We calculate the contributions of the non-universal gauge bosons Z′,predicted by topcolor-assisted technicolor (TC2) models and flavor-universal TC2 models,to the lepton flavor-violation tau decays τ →l iγ and τ →l il jl k. We find that the branching ratio Br(τ →l il jl k) is larger than that of the process τ →l iγ in all of the parameter space. Over a sizable region of the parameter space,we have Br(τ →l il jl k)~10-8,which may be tested in the future experiments.
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YUE Chong-Xing, ZHANG Yan-Ming and LIU Lan-Jun. Z′and Lepton Flavor-Violation Tau Decays[J]. Chinese Physics C, 2003, 27(7): 564-566.
YUE Chong-Xing, ZHANG Yan-Ming and LIU Lan-Jun. Z′and Lepton Flavor-Violation Tau Decays[J]. Chinese Physics C, 2003, 27(7): 564-566. shu
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Received: 2002-12-05
Revised: 1900-01-01
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Z′and Lepton Flavor-Violation Tau Decays

    Corresponding author: YUE Chong-Xing,
  • Department of Physics,Liaoning Normal University,Dalian 116029,China2 College of Physics and Information Engineering,He′nan Normal University,Xinxiang 453002,China

Abstract: There are many models beyond the standard model predicting the existence of non-universal gauge bosons Z′,which can give rise to very rich phenomena. We calculate the contributions of the non-universal gauge bosons Z′,predicted by topcolor-assisted technicolor (TC2) models and flavor-universal TC2 models,to the lepton flavor-violation tau decays τ →l iγ and τ →l il jl k. We find that the branching ratio Br(τ →l il jl k) is larger than that of the process τ →l iγ in all of the parameter space. Over a sizable region of the parameter space,we have Br(τ →l il jl k)~10-8,which may be tested in the future experiments.

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