Resonant state D0⁎(2400) in the quasi-two-body B meson decays

Wang, Wen-Fei (Institute of Theoretical Physics, Shanxi University, Taiyuan, Shanxi, 030006, China) (State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan, Shanxi, 030006, China)

03 December 2018

Abstract: We study four quasi-two-body decay processes including D0⁎(2400) as the intermediate state in the perturbative QCD (PQCD) approach. The branching fraction predicted in this work for the decay mode B−→D0⁎(2400)0π−→D+π−π− agree with the data from Belle, BaBar and LHCb Collaborations. The PQCD prediction of the branching ratio for the decay B¯0→D0⁎+K−→D0π+K− is consistent with the value given by LHCb. For the decays B¯0→D0⁎+π−→D0π+π− and B−→D0⁎0K−→D+π−K− , the PQCD predicted branch ratios are 2.85−0.80+1.23(ωB)−0.81+1.05(ωDπ)−0.31+0.33(aDπ)−0.05+0.06(ΓD0⁎+)×10−4 and 4.65−1.30+1.89(ωB)−1.24+1.51(ωDπ)+0.40−0.38(aDπ)−0.18+0.22(ΓD0⁎0)×10−5 , respectively. We analyze the experimental branching fractions using the ratios RD0⁎0 and RD0⁎+ which are related to the decays with the neutral and charged D0⁎(2400) , respectively. The available experimental results for the quasi-two-body decays including D0⁎(2400) are not in agreement with the isospin relation and SU(3) flavor symmetry.

Published in: Physics letters B 788 (2019) 468-474
Published by: Elsevier
DOI: 10.1016/j.physletb.2018.11.054
License: CC-BY-3.0

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