Details

Autor(en) / Beteiligte

• Li, Ya
• Ma, Ai-Jun
• Rui, Zhou
• Wang, Wen-Fei
• Xiao, Zhen-Jun

Titel

Quasi-two-body decays B(s)→Pf2(1270)→Pππ in the perturbative QCD approach

Ist Teil von

• Physical review. D, 2018-09, Vol.98 (5)

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this work, we calculate the CP-averaged branching ratios and direct CP-violating asymmetries of the quasi-two-body decays B(s)→Pf2(1270)→Pππ with the two-pion distribution amplitude ΦππD by using the perturbative QCD factorization approach, where P represents a light pseudoscalar meson K, π, η and η′. The relativistic Breit-Wigner formula for the D-wave resonance f2(1270) is adopted to parameterize the timelike form factor Fπ, which contains the final state interactions between the pions in the resonant regions. The consistency of theoretical results with data can be achieved by determining the Gegenbauer moments of the D-wave two-pion distribution amplitudes. The decay rates for the considered decay modes are generally in the order of 10−9 to 10−6. The integrated direct CP asymmetries for the charged modes agree with the BABAR and Belle measurements. As a by-product, we extract the branching ratios of B(s)→Pf2(1270) from the corresponding quasi-two-body decay modes, which still need experimental tests at the ongoing and forthcoming experiments.