Pure annihilation type decays B0→Ds- K2*+ and Bs→Da2 in perturbative QCD approach

ZOU Zhi-Tian; ZHOU Rui; L&Uuml; Cai-Dian

doi:10.1088/1674-1137/37/1/013103

Chinese Physics C> 2013, Vol. 37> Issue(1) : 013103 DOI: 10.1088/1674-1137/37/1/013103

Pure annihilation type decays B⁰→D_s^- K₂^*+ and B_s→Da₂ in perturbative QCD approach

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Abstract：
We calculate the branching ratios of pure annihilation type decays B⁰→D_s^- K₂^*+ and B_s→Da₂ using the perturbative QCD approach based on k_T factorization. The branching ratios are predicted to be (60.6_{-16.5-10.4-2.1}^{+17.3+4.3+3.2} )× 10^-6 for B⁰→D_s^- K₂^*+, (1.1_-0.4-0.2-0.1^+0.4+0.1+0.1)×10^-6 for B_s→D⁰a₂⁰ and (2.3_-0.8-0.4-0.1^+0.8+0.2+0.1)×10^-6 for B_s→D^-a₂⁺. They are large enough to be measured in the ongoing experiment. Due to the shortage of contributions from penguin operators, there are no direct CP asymmetries for these decays in the Standard Model. We also derive simple relations among these decay channels to reduce theoretical uncertainties for the experiments to test the accuracy of theory and search of new physics signal.

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[1]

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ZOU Zhi-Tian, ZHOU Rui and LÜ Cai-Dian. Pure annihilation type decays B⁰→D_s^- K₂^*+ and B_s→Da₂ in perturbative QCD approach[J]. Chinese Physics C, 2013, 37(1): 013103. doi: 10.1088/1674-1137/37/1/013103

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Received: 2012-04-16
Revised: 2012-04-28

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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

Pure annihilation type decays B⁰→D_s^- K₂^*+ and B_s→Da₂ in perturbative QCD approach

Received Date: 2012-04-16

Accepted Date: 2012-04-28

Available Online: 2013-01-05

Abstract: We calculate the branching ratios of pure annihilation type decays B⁰→D_s^- K₂^*+ and B_s→Da₂ using the perturbative QCD approach based on k_T factorization. The branching ratios are predicted to be (60.6_{-16.5-10.4-2.1}^{+17.3+4.3+3.2} )× 10^-6 for B⁰→D_s^- K₂^*+, (1.1_-0.4-0.2-0.1^+0.4+0.1+0.1)×10^-6 for B_s→D⁰a₂⁰ and (2.3_-0.8-0.4-0.1^+0.8+0.2+0.1)×10^-6 for B_s→D^-a₂⁺. They are large enough to be measured in the ongoing experiment. Due to the shortage of contributions from penguin operators, there are no direct CP asymmetries for these decays in the Standard Model. We also derive simple relations among these decay channels to reduce theoretical uncertainties for the experiments to test the accuracy of theory and search of new physics signal.

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Pure annihilation type decays B⁰→D_s^- K₂^*+ and B_s→Da₂ in perturbative QCD approach

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Pure annihilation type decays B⁰→D_s^- K₂^*+ and B_s→Da₂ in perturbative QCD approach

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