Chiral excitations of open-beauty systems
Xiao-Yu Guo (Institute of Theoretical Physics, Faculty of Science, Beijing University of Technology, Beijing 100124, China, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planck Str. 1, 64291 Darmstadt, Germany); Matthias F. M. Lutz (Technische Universität Darmstadt, D-64289 Darmstadt, Germany, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planck Str. 1, 64291 Darmstadt, Germany)
We study the scattering of open-beauty mesons and Goldstone bosons as predicted by the chiral SU(3) Lagrangian. The impact of subleading-order chiral interactions to systems with and quantum numbers is worked out. We estimate the relevant low-energy coefficients from the open-charm sector, for which their values have been determined previously from sets of QCD lattice data. The leading-order heavy-quark symmetry-breaking effects are estimated by matching the -meson ground-state chiral mass formula to the mass formula from the heavy-quark effective theory. We make refined predictions for the flavor antitriplet and sextet resonances that are generated dynamically by coupled-channel interactions.