Probing the Infrared Quark Mass from Highly Excited Baryons
| Autor: | Felipe J. Llanes-Estrada, T. Van Cauteren, Pedro Bicudo, Marco Cardoso |
|---|---|
| Přispěvatelé: | Malenfant, Jerome |
| Rok vydání: | 2009 |
| Předmět: |
Quark
Particle physics High Energy Physics::Lattice Nuclear Theory Hadron FOS: Physical sciences General Physics and Astronomy Elementary particle Chiral Symmetry Restoration 01 natural sciences High Energy Physics - Phenomenology (hep-ph) Insensitivity to spontaneous chiral symmetry breaking 0103 physical sciences 010306 general physics Physics 010308 nuclear & particles physics High Energy Physics::Phenomenology Quark model Física Parity (physics) Fermion Baryon High Energy Physics - Phenomenology Physics and Astronomy Excited state Excited resonances Running quark mass Delta spectrum |
| Zdroj: | Physical Review Letters E-Prints Complutense: Archivo Institucional de la UCM Universidad Complutense de Madrid E-Prints Complutense. Archivo Institucional de la UCM instname |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | 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. 4 pages, 4 figures. submitted to Phys Rev Letters |
| Databáze: | OpenAIRE |
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