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Titolo:
Scalar mesons and glueball in a quark model allowing for gluon anomalies
Autore:
Volkov, MK; Yudichev, VL;
Indirizzi:
Joint Inst Nucl Res, Boguliubov Lab Theoret Phys, Dubna 141980, Russia Joint Inst Nucl Res Dubna Russia 141980 eoret Phys, Dubna 141980, Russia
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL A
fascicolo: 1, volume: 10, anno: 2001,
pagine: 109 - 117
SICI:
1434-6001(200101)10:1<109:SMAGIA>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
JONA-LASINIO MODEL; QUANTUM CHROMODYNAMICS; NAMBU; QCD; CONDENSATE; MIXINGS; MASSES; DECAYS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Volkov, MK Joint Inst Nucl Res, Boguliubov Lab Theoret Phys, Dubna 141980,Russia Joint Inst Nucl Res Dubna Russia 141980 Dubna 141980, Russia
Citazione:
M.K. Volkov e V.L. Yudichev, "Scalar mesons and glueball in a quark model allowing for gluon anomalies", EUR PHY J A, 10(1), 2001, pp. 109-117

Abstract

This paper is a sequel of a previous one (Scalar mesons in a chiral quark model with glueball, fur. Phys. J. A 8, 567 (2000)) where an attempt to construct an effective U(3) x U(3)-symmetric meson Lagrangian with a scalar glueball was made. The glueball was introduced by using the dilaton model on the base of scale invariance. The scale invariance breaking because of current quark masses and the scale anomaly of QCD reproduced by the dilaton potential, was taken into account. However, in the previous paper, the scale invariance breaking because of the terms like h(phi)phi (2)(0) and h(sigma)<(<sigma>)over bar>(2)(0), where phi (0) and <(<sigma>)over bar>(0) are the pseudoscalar and scalar isosinglets, was not taken into account. These terms are produced by the part of the 't Hooft interaction that is connected with gluon anomalies. Allowing for the scale invariance breaking by these terms has a decisive effect on the quarkonium-glueball mixing and noticeably changes the widths of glueball strong decays. Taking account of this additional source of the scale invariance breaking and its implications are the subject of the present work. It is also shown that in the decay of a glueballinto four pions, the channel with two rho -resonances dominates.

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Documento generato il 09/04/20 alle ore 20:00:05