Probing new physics in B→J/ψ π0 decay

  • 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 SJ/ψπ0 on the weak phase β, the other is from the relation of the total asymmetry ACP with the weak phase β. Our results show that the deviation ΔSJ/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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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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Probing new physics in B→J/ψ π0 decay

    Corresponding author: LI Jing-Wu,

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 SJ/ψπ0 on the weak phase β, the other is from the relation of the total asymmetry ACP with the weak phase β. Our results show that the deviation ΔSJ/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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