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• W2007995900 abstract "We study the dynamics of the open charm and beauty mesons using QCD spectral sum rules (QSSR), where we observe the important rôle of the chiral condensate 〈ψ¯ψ〉 in the mass-splittings between the scalar–pseudoscalar mesons. Fixing the sum rule parameters for reproducing the well known D(0−) and Ds(0−) masses, we re-obtain the running charm quark mass: m¯c(mc)=1.13−0.04+0.08GeV, which confirms our recent estimate from this channel [Phys. Lett. B 520 (2001) 115]. Therefore, using sum rules with no-free parameters, we deduce MDs(0+)≃(2297±113)MeV, which is consistent with the observed Ds(2317) meson, while a small SU(3) breaking of about 25 MeV for the Ds(0+)−D(0+) mass-difference has been obtained. We extend our analysis to the B-system and find MB(0+)−MB(0−)≃(422±196)MeV confirming our old result from moment sum rules [Phys. Lett. B 210 (1988) 238]. Assuming an approximate (heavy and light) flavour and spin symmetries of the mass-splittings as indicated by our results, we also deduce MDs*(1+)≃(2440±113)MeV in agreement with the observed DsJ(2457). We also get: fD(0+)≃(217±25)MeV much bigger than fπ=130.6MeV, while the size of the SU(3) breaking ratio fDs(0+)/fD(0+)≃0.93±0.02 is opposite to the one of the 0− channel of about 1.14." @default.
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• W2007995900 date "2005-01-01" @default.
• W2007995900 modified "2023-09-27" @default.
• W2007995900 title "Open charm and beauty chiral multiplets in QCD" @default.
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• W2007995900 doi "https://doi.org/10.1016/j.physletb.2004.11.002" @default.
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