The low-energy theorem of pion photoproduction using the Skyrme model

Tamio Ikehashi*, Koichi Ohta

*この研究の対応する著者

研究成果: Article査読

抄録

We reassess the validity of the current-algebra based low-energy theorem of pion photoproduction on the nucleon using the Skyrme model. We find that one of the off-shell electromagnetic form factors of the nucleon exhibits infrared divergence in the chiral limit. This contribution introduces an additional term to the threshold amplitude predicted by the low-energy theorem. The emergence of the additional term indicates an unavoidable necessity of off-shell form factors in deriving the low-energy theorem. In the case of neutral pion production, the new contribution to the threshold amplitude is found to be comparable in magnitude to the low-energy theorem's prediction and has the opposite sign. In the charged pion production channels, the correction to the theorem is shown to be relatively small.

本文言語English
ページ(範囲)443-471
ページ数29
ジャーナルNuclear Physics, Section A
592
4
DOI
出版ステータスPublished - 1995 10月 2
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

フィンガープリント

「The low-energy theorem of pion photoproduction using the Skyrme model」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル