Branching ratio and CP asymmetry of B-s -> K-0* (1430)pi decays in the PQCD approach

作者：Zhang, Zhi-Qing^*

来源：EPL, 2012, 97(1): 11001.

DOI：10.1209/0295-5075/97/11001

• SCALAR MESON
• F(0)(980)
• F(0)(1500)
• A(0)(980)

In the two-quark model supposition for K-0* (1430), the branching ratios and the direct CP-violating asymmetries for decays (B) over bar (0)(s) -> K-0*(0)(1430)pi(0), K-0*(+)(1430)pi(-) are studied by employing the perturbative QCD factorization approach. We find that although these two decays are both tree-dominated, the ratio of their penguin to tree contributions is very different: there is only a few percent for the decay (B) over bar (0)(s) -> K-0(*+)(1430)pi, while about 37% in scenario I, even 51% in scenario II for the decay (B) over bar (0)(s) -> K-0*(0)(1430)pi(0). It results that these two decays have very different values in the branching ratios and the direct CP asymmetries. The branching ratio of the decay (B) over bar (0)(s) -> K-0*(+)(1430)pi(-) is at the order of 10(-5), and its direct CP asymmetry is about (20-30)%, whereas for the decay (B) over bar (0)(s) -> K-0*(0)(1430)pi(0) its direct CP-violating asymmetry is very large and about 90%, but difficult to measure because the branching ratio for this channel is small and only 10(-7) order.

• 出版日期2012-1
• 单位河南工业大学