Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-04-08
Eur.Phys.J.C29:71-78,2003
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, to appear in Eur. Phys. J. C
Scientific paper
10.1140/epjc/s2003-01218-1
If instantons are introduced into the MIT bag model in such a way that bag radii are allowed to vary, the MIT bag interior can accommodate instanton density which is by an order of magnitude larger than in the case when the radii are fixed (although it is still significantly smaller than in the nonperturbative QCD vacuum). The instanton contribution to baryon mass shifts is also correspondingly larger. The instanton-induced part of the scalar strangeness of the nucleon MIT bag is an order of magnitude larger than found previously, within the linearized approximation. The decrease of the model radii (which is associated with the increase of the instanton density) is very favorable from the standpoint of nuclear physics.
Klabucar Dubravko
Kumericki Kresimir
Mekterovic D.
Podobnik Boris
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