Chinese Physics C > 2010, Vol. 34 > Issue(7): 937-943 DOI: 10.1088/1674-1137/34/7/002

B→(J/ψ,η_c) K decays in the perturbative QCD approach

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Abstract：

In this paper, we calculated theB→(J/ψ,η_c)K decays in the perturbative QCD (pQCD) factorization approach with the inclusion of the partial next-to-leading order (NLO) contributions. With the inclusion of the significant enhancement from the NLO vertex corrections, the NLO pQCD predictions for the branching ratios agree with the data within 2σ errors:Br(B⁰→J/ψK⁰)=5.2^+3.5_－2.8×10^－4,Br(B⁺→J/ψK⁺)=5.6^+3.7_－2.9×10^－4,Br(B⁰→ η_cK⁰)=5.5^+2.3_－2.0×10^－4,Br(B⁺→η_cK⁺) = 5.9^+2.5_－2.1×10^－4.

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LIU Xin, ZHANG Zhi-Qing and XIAO Zhen-Jun. B→(J/ψ,η _c) K decays in the perturbative QCD approach[J]. Chinese Physics C, 2010, 34(7): 937-943. doi: 10.1088/1674-1137/34/7/002

LIU Xin, ZHANG Zhi-Qing and XIAO Zhen-Jun. B→(J/ψ,η _c) K decays in the perturbative QCD approach[J]. Chinese Physics C, 2010, 34(7): 937-943. doi:10.1088/1674-1137/34/7/002 shu

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Received: 2009-09-17
Revised: 2009-11-24

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沈阳化工大学材料科学与工程学院沈阳 110142

B→(J/ψ,η_c) K decays in the perturbative QCD approach

Corresponding author:XIAO Zhen-Jun,

Received Date:2009-09-17
Accepted Date:2009-11-24
Available Online:2010-07-05

Abstract:

In this paper, we calculated theB→(J/ψ,η_c)K decays in the perturbative QCD (pQCD) factorization approach with the inclusion of the partial next-to-leading order (NLO) contributions. With the inclusion of the significant enhancement from the NLO vertex corrections, the NLO pQCD predictions for the branching ratios agree with the data within 2σ errors:Br(B⁰→J/ψK⁰)=5.2^+3.5_－2.8×10^－4,Br(B⁺→J/ψK⁺)=5.6^+3.7_－2.9×10^－4,Br(B⁰→ η_cK⁰)=5.5^+2.3_－2.0×10^－4,Br(B⁺→η_cK⁺) = 5.9^+2.5_－2.1×10^－4.