Excited Bc States via Continuum QCD
Abstract
We study the most recently observed excited Bc states with the Dyson-Schwinger equation and the Bethe-Salpeter equation approach of continuum QCD. The obtained MB+c(2S)=6.813(16)GeV, MB*+c(2S)=6.841(18)GeV and the mass splitting MBc+(2S)-MrecBc*+(2S) ≈ 0.039 GeV agree with the observations very well. Moreover we predict the leptonic decay constant fB+c(2S)=-0.165(10)GeV, fB*+c(2S)=-0.161(7)GeV respectively.
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