Probing the Infrared Quark Mass from Highly Excited Baryons

被引：25
作者：
Bicudo, P. [1 ]
Cardoso, M. [1 ]
Van Cauteren, T. [2 ]
Llanes-Estrada, Felipe J. [3 ]
机构：
[1] Inst Super Tecn, Dept Fis, CFTP, Lisbon, Portugal
[2] Univ Ghent, Dept Subat & Radiat Phys, B-9000 Ghent, Belgium
[3] Univ Complutense Madrid, Dept Fis Teor 1, Madrid, Spain
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 09期
关键词：
CHIRAL-SYMMETRY BREAKING; EFFECTIVE RESTORATION; MESON SPECTRUM; MODEL; CONFINEMENT; LATTICE; QCD;
D O I：
10.1103/PhysRevLett.103.092003
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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 midinfrared 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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页数：4
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