# Branching ratio and CP asymmetry of Bs→K0*(1430)η(') decays in the PQCD approach

• In the two-quark model supposition for K0*(1430), which can be viewed as either the first excited state (Scenario Ⅰ) or the lowest lying state (Scenario Ⅱ), the branching ratios and the direct CP-violating asymmetries for decays Bs0→K0*0(1430)η(') are studied by employing the perturbative QCD factorization approach. We find the following results: (a) The CP averaged branching ratios of Bs0→K0*0(1430)η and Bs0→K0*0(1430)η' are small and both in the order of 10-7. If one views K0*(1430) as the lowest lying state, B (Bs0→K0*0(1430)η)≈3.9×10-7 and B (Bs0→K0*0(1430)η')≈7.8×10-7. (b) While the direct CP-violating asymmetries of these two decays are not small: if we still take the parameters of K0*(1430) in scenario Ⅱ, ACPdir (Bs0→K0*0(1430)η)≈56.2% and ACPdir (Bs0→K0*0(1430)η')≈2.4%. (c) The annihilation contributions will play an important role in accounting for future data, because both the branching ratios and the direct CP asymmetries of these two decays are sensitive to the annihilation type contributions.
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ZHANG Zhi-Qing, WANG Shi-Jian and ZHANG Li-Ying. Branching ratio and CP asymmetry of Bs→K0*(1430)η(') decays in the PQCD approach[J]. Chinese Physics C, 2013, 37(4): 043103. doi: 10.1088/1674-1137/37/4/043103
ZHANG Zhi-Qing, WANG Shi-Jian and ZHANG Li-Ying. Branching ratio and CP asymmetry of Bs→K0*(1430)η(') decays in the PQCD approach[J]. Chinese Physics C, 2013, 37(4): 043103.
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Revised: 2012-07-11
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沈阳化工大学材料科学与工程学院 沈阳 110142

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## Branching ratio and CP asymmetry of Bs→K0*(1430)η(') decays in the PQCD approach

###### Corresponding author: ZHANG Zhi-Qing,

Abstract: In the two-quark model supposition for K0*(1430), which can be viewed as either the first excited state (Scenario Ⅰ) or the lowest lying state (Scenario Ⅱ), the branching ratios and the direct CP-violating asymmetries for decays Bs0→K0*0(1430)η(') are studied by employing the perturbative QCD factorization approach. We find the following results: (a) The CP averaged branching ratios of Bs0→K0*0(1430)η and Bs0→K0*0(1430)η' are small and both in the order of 10-7. If one views K0*(1430) as the lowest lying state, B (Bs0→K0*0(1430)η)≈3.9×10-7 and B (Bs0→K0*0(1430)η')≈7.8×10-7. (b) While the direct CP-violating asymmetries of these two decays are not small: if we still take the parameters of K0*(1430) in scenario Ⅱ, ACPdir (Bs0→K0*0(1430)η)≈56.2% and ACPdir (Bs0→K0*0(1430)η')≈2.4%. (c) The annihilation contributions will play an important role in accounting for future data, because both the branching ratios and the direct CP asymmetries of these two decays are sensitive to the annihilation type contributions.

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