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The $B_{c}$ mass up to order $\alpha_{s}^{4}$
We evaluate in perturbative QCD, up to order $\alpha_s^4$, the mass of the$B_c$. We use the so-called 1S-mass in order to improve the convergence of theperturbative series. Our result is $E(B_c)_{pert} = 6323^{+3 +7}_{-1 -6}$ MeV.Non-perturbative effects are discussed. An estimate in terms of localc...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
2000
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.62.094019 http://cds.cern.ch/record/425942 |
| Sumario: | We evaluate in perturbative QCD, up to order $\alpha_s^4$, the mass of the$B_c$. We use the so-called 1S-mass in order to improve the convergence of theperturbative series. Our result is $E(B_c)_{pert} = 6323^{+3 +7}_{-1 -6}$ MeV.Non-perturbative effects are discussed. An estimate in terms of localcondensates and a comparison with potential models seem to be consistent withnon-perturbative contributions of the order $ - (40\div 80)$ MeV. |
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