B⁰ → J/ψf₂(1270) decay in QCD factorization

In this paper, the hadronic decay B⁰ → J/ψf₂(1270) has been analyzed using the 'QCD factorization' method. The effective coefficients a_i^h have been calculated for three helicity states (h = 0, +, -) which give three contributions of amplitude. We have assumed two scenarios for J/ψ First, we have considered that J/ψ behaves as a light meson compared to the B meson and second, we have considered the mass of J/ψ in our calculations meaning that _mJ/ψ/mb is held fixed. The branching ratios are calculated in these two scenarios and also in different energy scales (μ = m_b, μ = m_b/2, and μ = 2m_b). The obtained results are in agreement with available experimental data for the second scenario and μ = 2m_b. (author)