Probing the infrared quark mass from highly excited baryons



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Llanes Estrada, Felipe José and Bicudo, Pedro and Cardoso, M (2009) Probing the infrared quark mass from highly excited baryons. Physical Review Letters, 103 (9). ISSN 0031-9007

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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 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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© 2009 The American Physical Society.
We thank L. Glozman for useful conversations and grants FPA 2008-00592/FPA, FIS2008-01323, CERN/FP/83582/2008, POCI/FP/81933/2007, /81913/2007, PDCT/FP/63907/2005, and /63923/2005, Spain-Portugal billateral grant HP2006-0018/E-56/07, as well as the Scientific Research Fund of Flanders.

Uncontrolled Keywords:Chiral-Symmetry Breaking, Effective Restoration, Meson Spectrum, Model, Confinement, Lattice, Qcd
Subjects:Sciences > Physics
ID Code:22694
Deposited On:10 Sep 2013 16:39
Last Modified:20 Apr 2018 18:12

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