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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:
 14346001(200101)10:1<109:SMAGIA>2.0.ZU;2I
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 JONALASINIO 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. 109117
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 quarkoniumglueball 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