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

REN Ping; XING Zhi-Zhong

doi:10.1088/1674-1137/34/4/003

Chinese Physics C> 2010, Vol. 34> Issue(4) : 433-443 DOI: 10.1088/1674-1137/34/4/003

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

REN Ping ^, ,
XING Zhi-Zhong

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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 ν_i (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 ν_i and N₁ to B(H⁺→l⁺_αν). We illustrate some salient features of such interference effects by considering three typical mass patterns of ν_i, 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

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Received: 2009-05-21
Revised: 2009-06-15

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: REN Ping,

Received Date: 2009-05-21

Accepted Date: 2009-06-15

Available Online: 2010-04-05

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 ν_i (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 ν_i and N₁ to B(H⁺→l⁺_αν). We illustrate some salient features of such interference effects by considering three typical mass patterns of ν_i, 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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Lepton-number-violating decays of singly-charged Higgs bosons in the type-(Ⅰ+Ⅱ) seesaw model

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