Production of the Y (4260) State in B Meson Decay

8th International Workshop on Hadron Physics

Albuquerque, R.M.^1 ; Nielsen, M.^2 ; Zanetti, C.M.^3

Instituto de Física Teórica, Universidade Estadual Paulista (IFT-UNESP), Brazil^1

Instituto de Física, Universidade de São Paulo (IF-USP), Brazil^2

Faculdade de Tecnologia, Universidade Do Estado Do Rio de Janeiro (FAT-UERJ), Brazil^3

关键词: B meson decays;    Branching fractions;    Branching ratio;    Charmonium;    Mixing angle;    QCD sum rules;    Upper limits;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/706/4/042015/pdf
DOI  :  10.1088/1742-6596/706/4/042015

来源: IOP

【 摘 要 】

We calculate the branching ratio for the production of the meson Y(4260) in the decay B-→ Y(4260)K-. We use QCD sum rules approach and we consider the Y(4260) to be a mixture between charmonium and exotic tetraquark, [cq][qc], states with JPC= 1-. Using the value of the mixing angle determined previously as: θ = (53.0 ± 0.5)°, we get the branching ratio B(B → Y(4260)K) = (1.34 ± 0.47) × 10-6, which allows us to estimate an interval on the branching fraction 3.0 × 10-8Y-6in agreement with the experimental upper limit reported by Babar Collaboration.