Direct CP violation in multi-body B decays with a00(980)f0(980) mixing

Wang, Chao (Center for Ecological and Environmental Sciences, Key Laboratory for Space Bioscience & Biotechnology, Northwestern Polytechnical University, Xi’an 710072, China) ; Wang, Rui-Wu (Center for Ecological and Environmental Sciences, Key Laboratory for Space Bioscience & Biotechnology, Northwestern Polytechnical University, Xi’an 710072, China) ; Kang, Xian-Wei (College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China) ; Guo, Xin-Heng (College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China)

16 April 2019

Abstract: We predict that a00(980)f0(980) mixing would lead to large CP violation. We calculate the localized direct CP asymmetry in the decays B±f0(980)[a00(980)]π±π+ππ± via the a00(980)f0(980) mixing mechanism based on the hypothetical qq¯ structures of a00(980) and f0(980) in the QCD factorization approach. It is shown that there is a peak for CP violation, which could be as large as 58%, when the invariant mass of ππ is near the masses of a00(980) and f0(980). Since the CP asymmetry is sensitive to a00(980)f0(980) mixing, measuring the CP-violating parameter in the aforementioned decays could provide a new way to verify the existence of a00(980)f0(980) mixing and be helpful in clarifying the configuration of the light scalar mesons.


Published in: Physical Review D 99 (2019)
Published by: APS
DOI: 10.1103/PhysRevD.99.074017
License: CC-BY-4.0



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