Chiral Effective Theory with a Scalar Field

被引：0
作者：
Tarrus, Jaume [1 ]
机构：
[1] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Catalonia, Spain
来源：
IX INTERNATIONAL CONFERENCE ON QUARK CONFINEMENT AND THE HADRON SPECTRUM (QCHS IX) | 2011年 / 1343卷
关键词：
ChPT; resonances; sigma particle; PERTURBATION-THEORY; TRIVIALITY;
D O I：
10.1063/1.3574998
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We report on an extension of Chiral Perturbation Theory including a scalar, isosiglet field [1] (henceforth refered as chi PTS). We work out the chiral Lagrangian up to next-to-leading order (NLO) including the new field and present the expressions for the pion mass and the pion decay constant computed in this new theory, which feature distincly new analytical structure on the quark mass. We compare the new expressions and the standard Chiral Perturbation Theory ones with lattice data, and provide the values for the low energy constants obtained.
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收藏
页码：268 / 270
页数：3
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