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Titolo:
QCD STRING IN THE BARYON
Autore:
KALASHNIKOVA YS; NEFEDIEV AV;
Indirizzi:
UNIV MANCHESTER,DEPT PHYS & ASTRON MANCHESTER M13 9PL LANCS ENGLAND MOSCOW THEORET & EXPT PHYS INST,STATE RES CTR MOSCOW 117259 RUSSIA
Titolo Testata:
Physics of atomic nuclei
fascicolo: 8, volume: 60, anno: 1997,
pagine: 1333 - 1343
SICI:
1063-7788(1997)60:8<1333:QSITB>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUX-TUBE MODEL; RELATIVIZED QUARK-MODEL; WILSON-LOOP; QUANTUM CHROMODYNAMICS; DYNAMICAL REGIMES; AREA LAW; PHOTOPRODUCTION; HYBRID; ELECTROPRODUCTION; RESONANCES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
Y.S. Kalashnikova e A.V. Nefediev, "QCD STRING IN THE BARYON", Physics of atomic nuclei, 60(8), 1997, pp. 1333-1343

Abstract

The QCD motivated constituent string model is extended to consider the baryon. The system of three quarks propagating in a confining background field is studied in the Wilson loop approach, and the effective action is obtained. The resulting Lagrangian at large interquark distances corresponds to the Mercedes Bent string configuration. Under the assumption that quarks are sufficiently heavy to allow the adiabatic separation of quark and string-junction motions, the use of hyperspherical expansion for the quark subsystem makes it possible to write and solve the classical equation of motion for the junction. The motion of the junction is quantized, and it is shown that the effective ''swelling'' of the baryon in relation to the standard potential picture occursas the result of taking these modes into account. Effects associated with a finite pluon-correlation length, which do not affect excited states, but which appear to be substantial for the baryon ground state, reducing the ''swelling'' considerably and leaving room to the short-range Coulomb force in the three-quark system, are discussed.

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Documento generato il 11/07/20 alle ore 20:56:43