QCD sum rules study of meson-baryon sigma terms

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2008-11-01

Author

Erkol, Gueray
Oka, Makoto
Turan, Gürsevil

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The pion-baryon sigma terms and the strange-quark condensates of the octet and the decuplet baryons are calculated by employing the method of QCD sum rules. We evaluate the vacuum-to-vacuum transition matrix elements of two baryon interpolating fields in an external isoscalar-scalar field and use a Monte Carlo-based approach to systematically analyze the sum rules and the uncertainties in the results. We extract the ratios of the sigma terms, which have rather high accuracy and minimal dependence on QCD parameters. We discuss the sources of uncertainties and comment on possible strangeness content of the nucleon and the Delta.

Subject Keywords

Nuclear and High Energy Physics

URI

https://hdl.handle.net/11511/48623

Journal

PHYSICAL REVIEW D

DOI

https://doi.org/10.1103/physrevd.78.094003

Collections

Department of Physics, Article

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Citation Formats

G. Erkol, M. Oka, and G. Turan, “QCD sum rules study of meson-baryon sigma terms,” PHYSICAL REVIEW D, pp. 0–0, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48623.