Reference : Two photon decay of the glueball and scalar isosclar mesons in a scaled NJL model

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/2268/23468

Title :	Two photon decay of the glueball and scalar isosclar mesons in a scaled NJL model
Language :	English
Author, co-author :	Jaminon, Martine [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
	Van den Bossche, Bruno [ > > ]
Publication date :	1998
Journal title :	Nuclear Physics A
Publisher :	Elsevier Science
Volume :	636
Pages :	113-126
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0375-9474
City :	Amsterdam
Country :	The Netherlands
Abstract :	[en] We use a modified version of the Nambu-Jona-Lasinio (NJL) model which implements the QCD trace anomaly to calculate the two photon decay width of the glueball (f0(1500)) and of the two scalar mesons (f0(1370), fJ=0(1710)) to which it is mixed. We investigate the effect of the mixing over the coupling constants of the f0 states to the quarks and over the widths. We show that mass and phase space effects are crucial, at least in the NJL model, in determining the relative strength of the 2γ widths.
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/23468
DOI :	10.1016/S0375-9474(98)00201-2

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