Corpus ID: 17511964

Excited baryons as experimental probes of the quark mass

@article{LlanesEstrada2009ExcitedBA,
  title={Excited baryons as experimental probes of the quark mass},
  author={Felipe J Llanes-Estrada and Pedro Bicudo and Marco Cardoso and Tim van Cauteren},
  journal={arXiv: Nuclear Theory},
  year={2009}
}
We observe that excited hadrons provide an opportunity to probe from experiment the power-law running of the quark mass in the mid infrared, while the condition m(k) < k remains valid. A relatively clean analysis is possible for the maximum spin excitations of the Delta baryons accessible at current experimental facilities such as ELSA and Jlab. 

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It is argued 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, and a measurement of masses of high-partial-wave Delta* resonances should be sufficient to unambiguously establish the approximate degeneracy. Expand
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