CHIRAL-SYMMETRY BREAKING AND QUARK MASSES

被引：0
|
作者：
EFROSININ, VP
ZAIKIN, DA
OSIPCHUK, II
机构：
来源：
PHYSICS OF ATOMIC NUCLEI | 1994年 / 57卷 / 08期
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中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
It is shown that knowledge of current and constituent quark masses is important for evaluating meson-nucleon sigma-terms. Estimates for these terms are obtained in the generalized Nambu-Jona-Lasinio model and by using the expansion of the isosymmetric piN amplitude near the threshold in the Breit frame. The problem of s-wave pion condensation in nuclear matter and its relation to the pion-nucleon sigma-term are considered.
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页码：1413 / 1417
页数：5
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