Quasi-two-body decays B → Pf 0 (500)→ Pπ+π- in the perturbative QCD approach

被引：0
作者：
Zhang, Jia-Wei [1 ]
Cui, Bo-Yan [1 ]
Wu, Xing-Gang [2 ]
Fu, Hai-Bing [3 ]
Chen, Ya-Hui [4 ]
机构：
[1] Chongqing Univ Sci & Technol, Dept Phys, Chongqing 401331, Peoples R China
[2] Chongqing Univ, Dept Phys, Chongqing Key Lab Strongly Coupled Phys, Chongqing 401331, Peoples R China
[3] Guizhou Minzu Univ, Dept Phys, Guiyang 550025, Peoples R China
[4] Army Med Univ, Coll Basic Med Sci, Dept Phys, Chongqing 400038, Peoples R China
来源：
PHYSICAL REVIEW D | 2024年 / 110卷 / 03期
基金：
中国国家自然科学基金;
关键词：
U-SPIN; CP ASYMMETRIES; FORM-FACTORS; PI-PI; PENGUIN; BETA;
D O I：
10.1103/PhysRevD.110.036015
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this paper, we study the quasi-two-body decays B -> Pf(0) (500) -> P pi(+)pi(-) [with P = (pi, K, eta, eta ')] within framework of perturbative QCD (PQCD) factorization approach. With the help of pi - pi distribution amplitude and scalar form factor F-pi pi(omega(2)), we calculate the CP averaged branching fraction and the CP asymmetry for the quasi-two-body decays B -> Pf(0) (500) -> P pi(+)pi(-). Taking the quasi-two-body decay B -> pi(+) f(0)(500) -> pi(+)pi(+)pi(-) as an explicit example, we present the behavior of differential branching fraction and direct CP violation versus the pi-pi invariant mass. The total branching fraction and direct CP violation are B(B+ -> pi(+) [sigma ->]pi(+)pi(-)) = (1.78 +/- 0.41 +/- 0.51) x 10(-6) and A(CP)(B+ -> pi(+) [sigma ->]pi(+)pi(-)) = 29.8 +/- 11.1 +/- 13.0)% respectively. Our results could be tested by further experiments.
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页数：14
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