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Open Charm and Beauty Chiral Multiplets in QCD
| Content Provider | Semantic Scholar |
|---|---|
| Author | Narison, Stephan |
| Copyright Year | 2003 |
| Abstract | We study the dynamics of the the spin zero open charm and beauty mesons using QCD spectral sum rules (QSSR), where we observe the important rôle of the chiral condensate 〈ψ̄ψ〉 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: m̄c(mc) = 1.13 +0.08 −0.04 GeV, which confirms our recent estimate from this channel [1]. 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 [2]. Assuming an approximate (heavy and light) flavour and spin symmetries of the mass-splittings as indicated by our results, we also deduce MD∗ s (1+) ≃ (2440 ± 113) MeV in agreement with the observed Dsj(2457). We also get: fD(0+) ≃ (217 ± 25) MeV in the normalization where fπ=130.6 MeV, while the sizes of the SU(3) breaking ratios are opposite to the ones of the 0 channel: fDs(0+)/fD(0+) ≃ 0.93± 0.02. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/hep-ph/0307248v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Approximation algorithm Arabic numeral 0 Flavoring Mesons Multiplet Rank-Sum Tests Rule (guideline) Sum rule in quantum mechanics Whole Earth 'Lectronic Link |
| Content Type | Text |
| Resource Type | Article |
