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Título: | Bottom quark mass and αs from the Upsilon system |
Autor: | Jamin, Matthias; Pich, Antonio CSIC ORCID | Palabras clave: | Bottom quark mass Strong coupling constant Perturbation theory QCD sum rules |
Fecha de publicación: | 8-dic-1997 | Editor: | Elsevier | Citación: | Nuclear Physics B 507(1-2): 334-352 (1997) | Resumen: | The mass of the bottom quark and the strong coupling constant alpha_s are determined from QCD moment sum rules for the Upsilon system. Two analyses are performed using both the pole mass M_b as well as the mass m_b in the $\MSb$ scheme. In the pole-mass scheme large perturbative corrections resulting from coulombic contributions have to be resummed. In the $\MSb$ scheme this can be avoided by an appropriate choice for the renormalization scale. For the bottom quark mass we obtain M_b = 4.60 +- 0.02 GeV and m_b(m_b) = 4.13 +- 0.06 GeV. Our combined result from both determinations for the strong coupling is alpha_s(M_Z) = 0.119 +- 0.008. | Descripción: | 19 páginas, 1 figura, 5 tablas.-- PACS: 10; 12.38.-t; 11.55.Hx; 12.40.-- arXiv:hep-ph/9702276v1 | Versión del editor: | http://dx.doi.org/10.1016/S0550-3213(97)00558-0 | URI: | http://hdl.handle.net/10261/33255 | DOI: | 10.1016/S0550-3213(97)00558-0 | ISSN: | 0550-3213 |
Aparece en las colecciones: | (IFIC) Artículos |
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