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Titolo:
Perturbative QCD correction to the light-cone sum rule for the B* B pi andD* D pi couplings
Autore:
Khodjamirian, A; Ruckl, R; Weinzierl, S; Yakovlev, O;
Indirizzi:
Univ Wurzburg, Inst Theoret Phys, D-97074 Wurzburg, Germany Univ WurzburgWurzburg Germany D-97074 t Phys, D-97074 Wurzburg, Germany Ctr Etud Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France Ctr Etud Saclay Gif Sur Yvette France F-91191 191 Gif Sur Yvette, France
Titolo Testata:
PHYSICS LETTERS B
fascicolo: 1-3, volume: 457, anno: 1999,
pagine: 245 - 252
SICI:
0370-2693(19990617)457:1-3<245:PQCTTL>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXCLUSIVE PROCESSES; QUANTUM CHROMODYNAMICS; ASYMPTOTIC-BEHAVIOR; FORM-FACTORS; EVOLUTION; MESON;
Keywords:
QCD sum rules; perturbative calculations; bottom meson;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Khodjamirian, A Univ Wurzburg, Inst Theoret Phys, D-97074 Wurzburg, Germany Univ Wurzburg Wurzburg Germany D-97074 Wurzburg, Germany
Citazione:
A. Khodjamirian et al., "Perturbative QCD correction to the light-cone sum rule for the B* B pi andD* D pi couplings", PHYS LETT B, 457(1-3), 1999, pp. 245-252

Abstract

The B * B pi and D * D pi couplings have previously been derived from a QCD light-cone sum rule in leading order. Here, we describe the calculation of the O(alpha(s)) correction to the twist 2 term of this sum rule. The result is used for a first next-to-leading order analysis. We obtain g(B . ) (beta pi) = 22 +/- 7 and g(D . D pi) = 10.5 +/- 3, where the error indicates the remaining theoretical uncertainty. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

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Documento generato il 31/03/20 alle ore 05:06:12