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

作者：Li Y^*; Lu CD; Xiao ZJ; Yu XQ

来源：Physical Review D – Particles and Fields, 2004, 70(3): 034009.

DOI：10.1103/PhysRevD.70.034009

In this paper, we calculate the decay rate and CP asymmetry of the B-s-->pi(+)pi(-) decay in the perturbative QCD approach with Sudakov resummation. Since none of the quarks in final states is the same as those of the initial B-s meson, this decay can occur only via annihilation diagrams in the standard model. Besides the current-current operators, the contributions from the QCD and electroweak penguin operators are also taken into account. We find that (a) the branching ratio is about 4x10(-7); (b) the penguin diagrams dominate th

• 出版日期2004-8
• 单位南京师范大学; 中国高等科学技术中心