Ghost-free scalar-fermion interactions

Rampei Kimura, Yuki Sakakihara, Masahide Yamaguchi

研究成果: Article査読

5 被引用数 (Scopus)

抄録

We discuss a covariant extension of interactions between scalar fields and fermions in a flat space-time. We show, in a covariant theory, how to evade fermionic ghosts appearing because of the extra degrees of freedom behind a fermionic nature even in the Lagrangian with first derivatives. We will give a concrete example of a quadratic theory with up to the first derivative of multiple scalar fields and a Weyl fermion. We examine not only the maximally degenerate condition, which makes the number of degrees of freedom correct, but also a supplementary condition guaranteeing that the time evolution takes place properly. We also show that proposed derivative interaction terms between scalar fields and a Weyl fermion cannot be removed by field redefinitions.

本文言語English
論文番号044043
ジャーナルPhysical Review D
98
4
DOI
出版ステータスPublished - 2018 8月 15

ASJC Scopus subject areas

  • 物理学および天文学(その他)

フィンガープリント

「Ghost-free scalar-fermion interactions」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