New Heavy-Light Mesons Qq^^-(Nuclear Physics)

概要

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We succeed in reproducing the l=1B mesons B_1(5720), B^*_2(5745), and B^*_<S2>(5839) that were recently reported by D0 and CDF, using our semi-relativistic quark potential model, which also succeeds in predicting the mass spectra of the narrow D_<sJ>, as well as broad D^*_0(0^+) and D'_1(1^+) particles observed a couple of years ago. The mass of higher excited states (l=1,2) of B and B_s mesons, which have not yet been observed, is also predicted to first order in p/m_b with the internal quark momentum p and the b quark mass m_b. We find that the corresponding B_<sJ> are below the BK/B^*K threshold and should have narrow decay widths, contrary to most other predictions. Also, already established states (l=0 and l=1) of D, D_s, B, and B_s heavy mesons are simultaneously reproduced in good agreement with experimental data, within one percent accuracy. To calculate these D/D_s and B/B_s heavy mesons, we use different values of the strong coupling, α^c_s and α^b_s, respectively.
理論物理学刊行会の論文
2007-06-25