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B$_{c}$ mass up to order $\alpha_{s}^{4}$
We evaluate in perturbative QCD, up to order alphas4, the mass of the Bc. We use the so-called 1S mass in order to improve the convergence of the perturbative series. Our result is E(Bc) pert = 6326-9+29 MeV. Nonperturbative effects are discussed. A comparison with potential models seems to be consi...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
2000
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/1035368 |
| Sumario: | We evaluate in perturbative QCD, up to order alphas4, the mass of the Bc. We use the so-called 1S mass in order to improve the convergence of the perturbative series. Our result is E(Bc) pert = 6326-9+29 MeV. Nonperturbative effects are discussed. A comparison with potential models seems to be consistent with nonperturbative contributions of the order –(40–100) MeV. |
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