Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
SCALAR B-]PI AND D-]PI FORM-FACTORS IN QCD - ART. NO. 054013
Autore:
KHODJAMIRIAN A; RUCKL R; WINHART CW;
Indirizzi:
UNIV WURZBURG,INST THEORET PHYS D-97074 WURZBURG GERMANY CERN,DIV THEORY CH-1211 GENEVA 23 SWITZERLAND
Titolo Testata:
Physical review. D. Particles and fields
fascicolo: 5, volume: 5805, anno: 1998,
pagine: 4013 -
SICI:
0556-2821(1998)5805:5<4013:SBADFI>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXCLUSIVE PROCESSES; QUANTUM CHROMODYNAMICS; ASYMPTOTIC-BEHAVIOR; SUM-RULES; DECAY; MESONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
A. Khodjamirian et al., "SCALAR B-]PI AND D-]PI FORM-FACTORS IN QCD - ART. NO. 054013", Physical review. D. Particles and fields, 5805(5), 1998, pp. 4013

Abstract

QCD sum rules on the light cone are derived for the sum f(+) + f(-) of the B-->pi and D-->pi form factors taking into account contributionsup to twist four. Combining the results with the corresponding f(+) form factors calculated previously by the same method, we obtain the scalar form factors f(0). Our sum rule predictions are compared with lattice results, current-algebra constraints, and quark-model calculations. Furthermore, we calculate decay distributions and the integrated width for the semileptonic decay B--><pi(tau)over bar $>nu(tau) which issensitive to f(0). Finally, the dependence of the sum rules on the heavy quark mass and the asymptotic scaling laws are discussed. [S0556-2821(98)02117-1]

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/04/20 alle ore 11:17:52