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arXiv · 2007.07849

The bottom-charmed meson spectrum from a QCD approach based on Tamm--Dancoff approximation

L. M. Abreu·F. M. da Costa Júnior·A. G. Favero
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Abstract

The bottom-charmed meson spectrum is studied in this work via an effective version of the Coulomb gauge QCD Hamiltonian. The Tamm-Dancoff approximation is employed to estimate the energies of the low-lying and radial-excited $B_c$ states with quantum numbers $J^P = 0^{-}, 0^{+}, 1^{-}, 1^{+}, 2^{+}, 2^{-}$. In particular, we analyze the effects of incorporating an effective transverse hyperfine interaction and spin mixing. The Regge trajectories and hyperfine splitting of both $S$- and $P$-wave states are also examined. The numerical results are compared with available experimental data and theoretical predictions of other models.

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L. M. Abreu, F. M. da Costa Júnior, A. G. Favero. 2020-07-13. The bottom-charmed meson spectrum from a QCD approach based on Tamm--Dancoff approximation. https://doi.org/10.1103/physrevd.102.034002

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