Probing the infrared quark mass from highly excited baryons

Details Probing the infrared quark mass from highly excited baryons Probing the infrared quark mass from highly excited baryons

2009-02-20

arxiv.org/abs/0902.3613v2

Phys.Rev.Lett.103:092003,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 4 figures. submitted to Phys Rev Letters

Scientific paper

10.1103/PhysRevLett.103.092003

We argue that three-quark excited states naturally group into quartets, split into two parity doublets, and that the mass splittings between these parity partners decrease higher up in the baryon spectrum. This decreasing mass difference can be used to probe the running quark mass in the mid-infrared power-law regime. A measurement of masses of high-partial wave Delta* resonances should be sufficient to unambiguously establish the approximate degeneracy. We test this concept with the first computation of excited high-j baryon masses in a chirally invariant quark model.

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