Lepton-number-violating decays of singly-charged Higgs bosons in the type-(Ⅰ+Ⅱ) seesaw model

  • The lepton-number-violating decays of singly-charged Higgs bosons H± are investigated in the minimal type-(Ⅰ+Ⅱ) seesaw model with one SU(2)L Higgs triplet Δ and one heavy Majorana neutrino N1 at the TeV scale. We find that the branching ratios B (H+→l+αν) (for α=e, μ, τ) depend not only on the mass and mixing parameters of three light neutrinos νi (for i=1,2,3) but also on those of N1. Assuming that the mass of N1 lies in the range of 200 GeV to 1 TeV, we figure out the generous interference bands for the contributions of νi and N1 to B(H+→l+αν). We illustrate some salient features of such interference effects by considering three typical mass patterns of νi, and show that the relevant Majorana CP-violating phases can affect the magnitudes of B (H+→l+αν) in this parameter region.

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REN Ping and XING Zhi-Zhong. Lepton-number-violating decays of singly-charged Higgs bosons in the type-(Ⅰ+Ⅱ) seesaw model[J]. Chinese Physics C, 2010, 34(4): 433-443. doi: 10.1088/1674-1137/34/4/003
REN Ping and XING Zhi-Zhong. Lepton-number-violating decays of singly-charged Higgs bosons in the type-(Ⅰ+Ⅱ) seesaw model[J]. Chinese Physics C, 2010, 34(4): 433-443.  doi: 10.1088/1674-1137/34/4/003 shu
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Received: 2009-05-21
Revised: 2009-06-15
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Lepton-number-violating decays of singly-charged Higgs bosons in the type-(Ⅰ+Ⅱ) seesaw model

    Corresponding author: REN Ping,

Abstract: 

The lepton-number-violating decays of singly-charged Higgs bosons H± are investigated in the minimal type-(Ⅰ+Ⅱ) seesaw model with one SU(2)L Higgs triplet Δ and one heavy Majorana neutrino N1 at the TeV scale. We find that the branching ratios B (H+→l+αν) (for α=e, μ, τ) depend not only on the mass and mixing parameters of three light neutrinos νi (for i=1,2,3) but also on those of N1. Assuming that the mass of N1 lies in the range of 200 GeV to 1 TeV, we figure out the generous interference bands for the contributions of νi and N1 to B(H+→l+αν). We illustrate some salient features of such interference effects by considering three typical mass patterns of νi, and show that the relevant Majorana CP-violating phases can affect the magnitudes of B (H+→l+αν) in this parameter region.

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