Rare semileptonic decays of heavy mesons in the heavy quark limit

LI Hai-Bo; YANG Mao-Zhi

doi:10.1088/1674-1137/34/2/021

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2024年10月30日

Chinese Physics C> 2010, Vol. 34> Issue(2) : 262-266 DOI: 10.1088/1674-1137/34/2/021

Rare semileptonic decays of heavy mesons in the heavy quark limit

LI Hai-Bo ,
YANG Mao-Zhi ^,

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Abstract：
We study the branching ratios of D⁺→D⁰e⁺ν, D⁺_S→D⁰e⁺ν, B⁰_S→B⁺e^－ν, D⁺_S→D⁺ e^－e⁺ and B⁰_S→B⁰e^－e⁺ rare semileptonic decay processes, which are induced by decays of light quarks, the heavy quarks remain unchanged. The branching ratios of these decay processes are estimated in the heavy quark limit and with SU(3) flavor symmetry. We find that the decay rates are very tiny in the framework of the Standard Model. We also estimate the sensitivities of the measurements of these rare decays at the future experiments, such as BES-Ⅲ, super-B and LHC-b. Observations of these decays may shed some light on new physics beyond the standard model.

References

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LI Hai-Bo and YANG Mao-Zhi. Rare semileptonic decays of heavy mesons in the heavy quark limit[J]. Chinese Physics C, 2010, 34(2): 262-266. doi: 10.1088/1674-1137/34/2/021

LI Hai-Bo and YANG Mao-Zhi. Rare semileptonic decays of heavy mesons in the heavy quark limit[J]. Chinese Physics C, 2010, 34(2): 262-266. doi: 10.1088/1674-1137/34/2/021 shu

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Received: 2009-09-02
Revised: 2009-09-25

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沈阳化工大学材料科学与工程学院沈阳 110142

Rare semileptonic decays of heavy mesons in the heavy quark limit

LI Hai-Bo
YANG Mao-Zhi ^,

Corresponding author: YANG Mao-Zhi,

Received Date: 2009-09-02
Accepted Date: 2009-09-25
Available Online: 2010-02-05

Abstract:

We study the branching ratios of D⁺→D⁰e⁺ν, D⁺_S→D⁰e⁺ν, B⁰_S→B⁺e^－ν, D⁺_S→D⁺ e^－e⁺ and B⁰_S→B⁰e^－e⁺ rare semileptonic decay processes, which are induced by decays of light quarks, the heavy quarks remain unchanged. The branching ratios of these decay processes are estimated in the heavy quark limit and with SU(3) flavor symmetry. We find that the decay rates are very tiny in the framework of the Standard Model. We also estimate the sensitivities of the measurements of these rare decays at the future experiments, such as BES-Ⅲ, super-B and LHC-b. Observations of these decays may shed some light on new physics beyond the standard model.