Apparently Noninvariant Terms of U(N) × U(N) nonlinear sigma model in the one-loop approximation

Koji Harada, Hirofumi Kubo, Yuki Yamamoto

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

We show how the Apparently Noninvariant Terms (ANTs), which emerge in perturbation theory of nonlinear sigma models, are consistent with the nonlinearly realized symmetry by employing the Ward-Takahashi identity (in the form of an inhomogeneous Zinn-Justin equation). In the literature the discussions on ANTs are confined to the SU(2) case. We generalize them to the U(N) case and demonstrate explicitly at the one-loop level that despite the presence of divergent ANTs in the effective action of the "pions", the symmetry is preserved.

本文言語英語
ページ(範囲)475-498
ページ数24
ジャーナルProgress of Theoretical Physics
123
3
DOI
出版ステータス出版済み - 3 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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