Pion-Nucleon Sigma Term and Strangeness in Nucleon

Chin. Phys. Lett.

1997, Vol. 14

Issue (4): 252-254 DOI:

Original Articles

Pion-Nucleon Sigma Term and Strangeness in Nucleon

CHEN Hong

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, and Department of Physics, Southwest China Normal University, Chongqing 630715

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CHEN Hong 1997 Chin. Phys. Lett. 14 252-254

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Abstract It is shown that the meson exchange interaction between dynamical quarks generated by the chiral symmetry breaking is of crucial importance to explain the empirical value of the pion-nucleon σ-term. The large contribution of ss and gluon to a nucleon mass is predicted by using the QCD energy-momentum trace anomaly from the pion-nucleon σ-term.

Keywords: 12.39.Fe 12.39.-x 12.38.Lg

Published: 01 April 1997

PACS:	12.39.Fe	(Chiral Lagrangians)
	12.39.-x	(Phenomenological quark models)
	12.38.Lg	(Other nonperturbative calculations)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1997/V14/I4/0252

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