The decays of anti B⁰, anti B_s⁰ and B^- into η_c plus a scalar or vector meson

We investigate the decays of anti B_s⁰, anti B⁰ and B^- into η_c plus a scalar or vector meson in a theoretical framework by taking into account the dominant process for the weak decay of anti B meson into η_c and a q anti q pair. After hadronization of this q anti q component into pairs of pseudoscalar mesons we obtain certain weights for the pseudoscalar meson-pseudoscalar meson components. In addition, the anti B⁰ and anti B⁰_s decays into η_c and ρ⁰, K* are evaluated and compared to the η_c and φ production. The calculation is based on the postulation that the scalar mesons f₀(500), f₀(980) and a₀(980) are dynamically generated states from the pseudoscalar meson-pseudoscalar meson interactions in S-wave. Up to a global normalization factor, the ππ, K anti K and πη invariant mass distributions for the decays of anti B⁰_s → η_cπ⁺π^-, anti B⁰_s → η_cK⁺K^-, anti B⁰ → η_cπ⁺π^-, anti B⁰ → η_cK⁺K^-, anti B⁰ → η_cπ⁰η, B^- → η_cK⁰K^- and B^- → η_cπ^-η are predicted. Comparison is made with the limited experimental information available and other theoretical calculations. Further comparison of these results with coming LHCb measurements will be very valuable to make progress in our understanding of the nature of the low lying scalar mesons, f₀(500), f₀(980) and a₀(980). (orig.)