B→J/ψK(1270)andB→J/ψK(1400)Decays in QCD Factorization Approach

摘要

The hadronicB→J/ψK(1270)andB→J/ψK(1400)has been analyzed in “QCD factorization” approach and generalized factorization. The effective coefficientsaihhave been calculated for three helicity statesh=0,+,−which give three different contribution of amplitudes. We consider thatJ/ψbehaves as a light meson in compared toBmeson. ForB+→J/ψK+(1270)andB+→J/ψK+(1400), experimental data of branching ratios are (1.8 ± 0.5) × 10−3and <5 × 10−4, respectively. Our best obtained results are (1.79 ± 0.01) × 10−3atθ= 58° and (1.42 ± 0.01) × 10−3atθ= 32° forB+→J/ψK+(1270)decay. And we have 4.27 × 10−4atθ= 58° and 3.45 × 10−4atθ= 32° forB+→J/ψK+(1400), which are in agreement with experiment.