Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
NNLO unquenched calculation of the b quark mass
Autore:
Gimenez, V; Giusti, L; Martinelli, G; Rapuano, F;
Indirizzi:
Univ Valencia, Dept Fis Teor, E-46100 Valencia, Spain Univ Valencia Valencia Spain E-46100 t Fis Teor, E-46100 Valencia, Spain Univ Valencia, IFIC, E-46100 Valencia, Spain Univ Valencia Valencia Spain E-46100 ncia, IFIC, E-46100 Valencia, Spain Boston Univ, Dept Phys, Boston, MA 02215 USA Boston Univ Boston MA USA 02215 ton Univ, Dept Phys, Boston, MA 02215 USA Univ Paris Sud, F-91405 Orsay, France Univ Paris Sud Orsay France F-91405 niv Paris Sud, F-91405 Orsay, France Univ Rome La Sapienza, Dipartimento Fis, I-00185 Rome, Italy Univ Rome La Sapienza Rome Italy I-00185 imento Fis, I-00185 Rome, Italy Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy Ist Nazl Fis Nucl Rome Italy I-00185 Nucl, Sez Roma, I-00185 Rome, Italy
Titolo Testata:
JOURNAL OF HIGH ENERGY PHYSICS
fascicolo: 3, , anno: 2000,
pagine: NIL_393 - NIL_414
SICI:
1029-8479(200003):3<NIL_393:NUCOTB>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
TO-LEADING ORDER; STATISTICS LATTICE CALCULATION; YANG-MILLS THEORY; QCD SUM-RULES; HEAVY-QUARK; POLE MASS; PERTURBATION-THEORY; HADRON SPECTRUM; DECAY CONSTANTS; WILSON FERMIONS;
Keywords:
lattice quantum field theory; lattice gauge field theories; quark masses and SM parameters; heavy quarks physics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
69
Recensione:
Indirizzi per estratti:
Indirizzo: Gimenez, V Univ Valencia, Dept Fis Teor, Dr Moliner 50, E-46100 Valencia, Spain Univ Valencia Dr Moliner 50 Valencia Spain E-46100 ncia, Spain
Citazione:
V. Gimenez et al., "NNLO unquenched calculation of the b quark mass", J HIGH EN P, (3), 2000, pp. NIL_393-NIL_414

Abstract

By combining the first unquenched lattice computation of the B-meson binding energy and the two-loop contribution to the lattice HQET residual mass, we determine the <(MS)over bar> b-quark mass, (m) over bar(b)((m) over bar(b)). The inclusion of the two-loop corrections is essential to extract (m) over bar(b)((m) over bar(b)) with a precision of O(Lambda(QCD)(2)/m(b)), which is the uncertainty due to the renormalon singularities in the perturbative series of the residual mass. Our best estimate is (m) over bar(b)((m) over bar(b)) = (4.26 +/- 0.09) GeV, where we have combined the different errors in quadrature. A detailed discussion of the systematic errors contributing to the final number is presented. Our results have been obtained on a sample of 60 lattices of size 24(3) x 40 at beta = 5.6, using the Wilson action for light quarks and the lattice HQET for the b quark, at two values ofthe sea quark masses. The quark propagators have been computed using the unquenched links generated by the T chi L collaboration.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 00:56:18