English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/33255
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Bottom quark mass and αs from the Upsilon system

AuthorsJamin, Matthias; Pich, Antonio
KeywordsBottom quark mass
Strong coupling constant
Perturbation theory
QCD sum rules
Issue Date8-Dec-1997
CitationNuclear Physics B 507(1-2): 334-352 (1997)
AbstractThe 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.
Description19 páginas, 1 figura, 5 tablas.-- PACS: 10; 12.38.-t; 11.55.Hx; 12.40.-- arXiv:hep-ph/9702276v1
Publisher version (URL)http://dx.doi.org/10.1016/S0550-3213(97)00558-0
Appears in Collections:(IFIC) Artículos
Files in This Item:
File Description SizeFormat 
9702276v1.pdf251,77 kBAdobe PDFThumbnail
Show full item record

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.