Supersymmetric contributions to Bs → K−π+ decay

• Published in: Chinese physics C Vol. 34; no. 11; pp. 1687 - 1692
• Main Authors: Xu, Yuan-Guo (元国 徐), Wang, Ru-Min (茹敏 王), Yang, Ya-Dong (亚东 杨)
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.11.2010; Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China; College of Physics Electron Engineering, Xinyang Normal University, Xinyang 464000, China%College of Physics Electron Engineering, Xinyang Normal University, Xinyang 464000, China%Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China
• Subjects: CP asymmetry; supersymmetry; mass insertion; branching ratio; Bs meson
• ISSN: 1674-1137; 2058-6132
• DOI: 10.1088/1674-1137/34/11/003

O4; Recently, the CDF Collaboration has measured the branching fraction and time-integrated direct CP asymmetry of BS→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 BS→K-π+ decay while the standard model prediction is very small. We compute the supersymmetry contributions to BS→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.