Bcmass up to orderαs4 | Zendy

Nora Brambilla | Zendy; Antonio Vairo | Zendy

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Bcmass up to orderαs4

Author(s) -

Nora Brambilla,

Antonio Vairo

Publication year - 2000

Publication title -

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Language(s) - English

Resource type - Journals

eISSN - 1089-4918

pISSN - 0556-2821

DOI - 10.1103/physrevd.62.094019

Subject(s) - order (exchange) , physics , convergence (economics) , algorithm , mathematics , economics , finance , economic growth

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 $E(B_c)_{pert} = 6326^{+29}_{-9}$ MeV.Non-perturbative effects are discussed. A comparison with potential modelsseems to be consistent with non-perturbative contributions of the order $ -(40\div 100)$ MeV.Comment: 14 pages, revtex, 2 figures, minor changes, discussion on the non-perturbative corrections added, final version to appear in Phys. Rev.

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