Chiral corrections to hyperon axial form factors

Fu Jiun Jiang, B. C. Tiburzi

研究成果: 雜誌貢獻文章

14 引文 斯高帕斯(Scopus)

摘要

We study the complete set of flavor-changing hyperon axial-current matrix elements at small momentum transfer. Using partially quenched heavy baryon chiral perturbation theory, we derive the chiral and momentum behavior of the axial and induced pseudoscalar form factors. The meson pole contributions to the latter posses a striking signal for chiral physics. We argue that the study of hyperon axial matrix elements enables a systematic lattice investigation of the efficacy of three-flavor chiral expansions in the baryon sector. This can be achieved by considering chiral corrections to SU(3) symmetry predictions, and their partially quenched generalizations. In particular, despite the presence of eight unknown low-energy constants, we are able to make next-to-leading order symmetry breaking predictions for two linear combinations of axial charges.

原文英語
文章編號094506
期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
77
發行號9
DOIs
出版狀態已發佈 - 2008 五月 20

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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