Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
The Kalman-Tran-D'Souza model and the semileptonic decay rates of heavy baryons
Autore:
DSouza, I; Kalman, CS; Kulikov, PY; Narodetskii, IM;
Indirizzi:
Concordia Univ, Montreal, PQ, Canada Concordia Univ Montreal PQ CanadaConcordia Univ, Montreal, PQ, Canada Inst Theoret & Expt Phys, Moscow 117259, Russia Inst Theoret & Expt Phys Moscow Russia 117259 hys, Moscow 117259, Russia
Titolo Testata:
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
, volume: 93, anno: 2001,
pagine: 3 - 8
SICI:
0920-5632(200103)93:<3:TKMATS>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONSTITUENT QUARK-MODEL; PAIR-CREATION MODEL; LIGHT-FRONT; FORM-FACTORS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: D'Souza, I Concordia Univ, Montreal, PQ, Canada Concordia Univ Montreal PQ Canada Univ, Montreal, PQ, Canada
Citazione:
I. D'Souza et al., "The Kalman-Tran-D'Souza model and the semileptonic decay rates of heavy baryons", NUCL PH B-P, 93, 2001, pp. 3-8

Abstract

We present an investigation of the inclusive semileptonic decay widths of the heavy baryons Lambda (Q), Sigma (Q) and Xi (Q), (q = b, c) performed within a relativistic constituent quark model. formulated on the light-front. In a way conceptually similar to the deep-inelastic scattering case, the H-Q-baryon inclusive width is expressed as the integral of the free Q-quark partial width multiplied by a bound-state factor related to the Q-quark distribution function in the H-Q. The non-perturbative mason structure is described through the quark-model wave functions, constructed via the Hamiltonian light-front formalism using as input the Kalman-Tran-D'Souza equal time wave functions. A link between spectroscopic quark models and the H-Q decayphysics is obtained in this way. It is shown that the bound-state effects and the Fermi motion of the b-quark remarkably reduce the decay rate with respect to the free-quark result. Our predictions for the BR(Lambda (c) ->X(s)lv(l)) and BR(Lambda (l) -> X(s)lv(l)) decays are in good agreement with existing data.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 00:27:48