Low lying scalar production in ˉB0, B− and ˉB0s decays into J/ψ and KˉK or πη
W. Liang*, J.J. Xie and E. Oset Baguena
Pre-published on:
February 16, 2018
Published on:
March 20, 2018
Abstract
In the framework of chiral unitary approach where the low lying scalar mesons f0(500), f0(980) and a0(980) can be generated dynamically from the pseudoscalar-pseudoscalar interaction, we study the ˉB0s→J/ψK+K−, ˉB0→J/ψK+K−, B−→J/ψK0K−, ˉB0→J/ψπ0η and B−→J/ψπ−η decays and compare their mass distributions with those obtained for the ˉB0s→J/ψπ+π− and ˉB0→J/ψπ+π−. The approach followed consist in a factorization of the weak part and the hadronization part into a factor which is common to all the processes. Then what makes the reactions different are some trivial Cabibbo-Kobayashi-Maskawa matrix elements and the weight by which the different pairs of mesons appear in a primary step plus their final state interaction. These elements are part of the theory and thus, up to a global normalization factor, all the invariant mass distributions are predicted with no free parameters. Comparison is made with the limited experimental information available. Further comparison of these results with coming LHCb measurements will be very valuable to make progress in our understanding of the meson-meson interaction and the nature of the low lying scalar meson resonances, f0(500),f0(980) and a0(980).
DOI: https://doi.org/10.22323/1.310.0038
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