B~° → J/Ψf_2(1270) decay in QCD factorization

摘要

In this paper, the hadronic decay B~° → J/Ψf_2(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 m_(j/Ψ)/m_b 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 = 2_(mb)). The obtained results are in agreement with available experimental data for the second scenario and μ = 2_(mb).