B→JψK(1270)‎ and B→JψK(1400)‎ Decays in QCD Factorization Approach

Abstract EN

The hadronic B→J/ψK(1270) and B→J/ψK(1400) has been analyzed in “QCD factorization” approach and generalized factorization.

The effective coefficients aih have been calculated for three helicity states h=0,+,− which give three different contribution of amplitudes.

We consider that J/ψ behaves as a light meson in compared to B meson.

For B+→J/ψK+(1270) and B+→J/ψK+(1400), experimental data of branching ratios are (1.8 ± 0.5) × 10−3 and <5 × 10−4, respectively.

Our best obtained results are (1.79 ± 0.01) × 10−3 at θ = 58° and (1.42 ± 0.01) × 10−3 at θ = 32° for B+→J/ψK+(1270) decay.

And we have 4.27 × 10−4 at θ = 58° and 3.45 × 10−4 at θ = 32° for B+→J/ψK+(1400), which are in agreement with experiment.