Branching ratio and CP asymmetry of B-s ->pi(0)eta((')) decays in the perturbative QCD approach

作者：Xiao Zhenjun^*; Liu Xin; Wang Huisheng

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2007, 75(3): 034017.

DOI：10.1103/PhysRevD.75.034017

We calculate the branching ratios and CP-violating asymmetries for B-s(0)->pi(0)eta((')) decays in the perturbative QCD (pQCD) factorization approach here. We not only calculate the usual factorizable contributions, but also evaluate the nonfactorizable and annihilation type contributions. The pQCD predictions for the CP-averaged branching ratios are BR(B-s(0)->pi(0)eta)approximate to 0.86x10(-7) and BR(B-s(0)->pi(0)eta('))approximate to 1.86x10(-7). The pQCD predictions for the CP-violating asymmetries are A(CP)(dir)(pi(0)eta)similar to-4.5%, A(CP)(dir)(pi(0)eta('))similar to-9.1%, A(CP)(mix)(pi(0)eta)similar to-0.2%, and A(CP)(mix)(pi(0)eta('))similar to 27% but with large errors. The above pQCD predictions can be tested in the forthcoming LHC-b experiments at CERN.

• 出版日期2007-2
• 单位南京师范大学; 浙江海洋大学