22-27 March 2015
Hotel do Bosque
Brazil/East timezone

## Production of the Y(4260) state in B meson decay

23 Mar 2015, 16:30
30m
Hotel do Bosque

#### Hotel do Bosque

Rodovia Mário Covas (Rio-Santos) BR - 101 Sul, Km 533, Angra dos Reis, RJ, Brazil
Oral presentation Hadronic structure - reactions, production and decays

### Speaker

Dr Raphael M. Albuquerque (University of São Paulo)

### Description

We calculate the branching ratio for the production of the meson $Y(4260)$ in the decay $B^- \to Y(4260)K^-$. We use QCD sum rules approach and we consider the $Y(4260)$ to be a mixture between charmonium and exotic tetraquark, $[\bar{c}\bar{q}][qc]$, states with $J^{PC}=1^{--}$. Using the value of the mixing angle determined previously as: $\theta=(53.0\pm0.5)^\circ$, we get the branching ratio $\mathcal{B}(B\to Y(4260)K)=(1.34\pm0.47)\times10^{-6}$, which allows us to estimate an interval on the branching fraction $3.0 \times 10^{-8} < {\mathcal B}_{_Y} < 1.8 \times 10^{-6}$ in agreement with the experimental upper limit reported by Babar Collaboration.

### Primary author

Dr Raphael M. Albuquerque (University of São Paulo)

### Co-authors

Prof. Carina Zanetti (UERJ) Prof. Marina Nielsen (University of São Paulo)

### Presentation Materials

There are no materials yet.