Probing new physics in B→J/ψ π<SUP>0</SUP> decay

LI Jing-Wu; WU Xiang-Yao

doi:10.1088/1674-1137/34/11/002

Chinese Physics C> 2010, Vol. 34> Issue(11) : 1680-1686 DOI: 10.1088/1674-1137/34/11/002

Probing new physics in B→J/ψ π⁰ decay

LI Jing-Wu ^, ,
WU Xiang-Yao

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Abstract：
We calculate the branching ratio of B→J/ψ π⁰ with a mixed formalism that combines the QCD-improved factorization and the perturbative QCD approaches. The result is consistent with experimental data. The quite small penguin contribution in B→J/ψ π⁰ decay can be calculated with this method. We suggest two methods to extract the weak phase β. One is through the dependence of the mixing induced CP asymmetry S_J/ψπ0 on the weak phase β, the other is from the relation of the total asymmetry A_CP with the weak phase β. Our results show that the deviation ΔS_{J/ψ π0} of the mixing induced CP asymmetry from sin(－2β) is of O(10^－3) and has much less uncertainty. The above O(10^－3) deviation can provide a good reference for identifying new physics.

References

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LI Jing-Wu and WU Xiang-Yao. Probing new physics in B→J/ψ π⁰ decay[J]. Chinese Physics C, 2010, 34(11): 1680-1686. doi: 10.1088/1674-1137/34/11/002

LI Jing-Wu and WU Xiang-Yao. Probing new physics in B→J/ψ π⁰ decay[J]. Chinese Physics C, 2010, 34(11): 1680-1686. doi: 10.1088/1674-1137/34/11/002 shu

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Received: 2010-01-04
Revised: 2010-01-12

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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

Probing new physics in B→J/ψ π⁰ decay

Corresponding author: LI Jing-Wu,

Received Date: 2010-01-04

Accepted Date: 2010-01-12

Available Online: 2010-11-05

Abstract:

We calculate the branching ratio of B→J/ψ π⁰ with a mixed formalism that combines the QCD-improved factorization and the perturbative QCD approaches. The result is consistent with experimental data. The quite small penguin contribution in B→J/ψ π⁰ decay can be calculated with this method. We suggest two methods to extract the weak phase β. One is through the dependence of the mixing induced CP asymmetry S_J/ψπ0 on the weak phase β, the other is from the relation of the total asymmetry A_CP with the weak phase β. Our results show that the deviation ΔS_{J/ψ π0} of the mixing induced CP asymmetry from sin(－2β) is of O(10^－3) and has much less uncertainty. The above O(10^－3) deviation can provide a good reference for identifying new physics.

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Probing new physics in B→J/ψ π⁰ decay

Probing new physics in B→J/ψ π⁰ decay