Supersymmetric contributions to Bs→K－π+ decay

XU Yuan-Guo; WANG Ru-Min; YANG Ya-Dong

doi:10.1088/1674-1137/34/11/003

Chinese Physics C> 2010, Vol. 34> Issue(11) : 1687-1692 DOI: 10.1088/1674-1137/34/11/003

Supersymmetric contributions to B_s→K^－π⁺ decay

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Abstract：
Recently, the CDF Collaboration has measured the branching fraction and time-integrated direct CP asymmetry of B__s→K^－π⁺ decay. The branching ratio is lower than the previous predictions based on QCD factorization. The experimental results favor a large CP asymmetry in B_s→K^－π⁺ decay while the standard model prediction is very small. We compute the supersymmetry contributions to B_s→K_－π⁺ decay using the mass insertion method, and find that the LR and RL mass insertions could suppress this branching ratio and increase this direct CP asymmetry well in line with the experimental data.

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XU Yuan-Guo, WANG Ru-Min and YANG Ya-Dong. Supersymmetric contributions to B_s→K^－π⁺ decay[J]. Chinese Physics C, 2010, 34(11): 1687-1692. doi: 10.1088/1674-1137/34/11/003

XU Yuan-Guo, WANG Ru-Min and YANG Ya-Dong. Supersymmetric contributions to B_s→K^－π⁺ decay[J]. Chinese Physics C, 2010, 34(11): 1687-1692. doi: 10.1088/1674-1137/34/11/003 shu

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Received: 2009-12-31
Revised: 2010-01-21

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沈阳化工大学材料科学与工程学院沈阳 110142

Supersymmetric contributions to B_s→K^－π⁺ decay

Corresponding author: YANG Ya-Dong,

Received Date: 2009-12-31
Accepted Date: 2010-01-21
Available Online: 2010-11-05

Abstract:

Recently, the CDF Collaboration has measured the branching fraction and time-integrated direct CP asymmetry of B__s→K^－π⁺ decay. The branching ratio is lower than the previous predictions based on QCD factorization. The experimental results favor a large CP asymmetry in B_s→K^－π⁺ decay while the standard model prediction is very small. We compute the supersymmetry contributions to B_s→K_－π⁺ decay using the mass insertion method, and find that the LR and RL mass insertions could suppress this branching ratio and increase this direct CP asymmetry well in line with the experimental data.