The charm/bottom quark mass from heavy quarkonium at N3LO
We determine the charm and bottom quark masses using the N33LO perturbative expression of the ground state (pseudoscalar) energy of the bottomonium, charmonium and Bcc systems: the ηbb, ηcc and Bcc masses. We work in the renormalon subtracted scheme, which allows us to control the divergence of...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/100978 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/100978 |
| Access Level: | acceso abierto |
| Palabra clave: | 53 QCD Phenomenology Física (Física) 2290 Física Altas Energías |
| Sumario: | We determine the charm and bottom quark masses using the N33LO perturbative expression of the ground state (pseudoscalar) energy of the bottomonium, charmonium and Bcc systems: the ηbb, ηcc and Bcc masses. We work in the renormalon subtracted scheme, which allows us to control the divergence of the perturbation series due to the pole mass renormalon. Our result for the MS‾MS masses reads m‾c(m‾c)=1223(33)mc(mc)=1223(33) MeV and m‾b(m‾b)=4186(37)mb(mb)=4186(37) MeV. We also extract a value of αss from a renormalon-free combination of the ηbb, ηcc and Bcc masses: αss(Mzz) = 0.1195(53). We explore the applicability of the weak coupling approximation to bottomonium n = 2 states. Finally, we consider an alternative computational scheme that treats the static potential exactly and study its convergence properties. |
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