Supersymmetry breaking and ghost Goldstino in modulated vacua

Sven Bjarke Gudnason, Muneto Nitta, Shin Sasaki, Ryo Yokokura

研究成果: Article査読

4 被引用数 (Scopus)

抄録

We discuss spontaneous supersymmetry (SUSY) breaking mechanisms by means of modulated vacua in four-dimensional N=1 supersymmetric field theories. The SUSY breaking due to spatially modulated vacua is extended to the cases of temporally and lightlike modulated vacua, using a higher-derivative model with a chiral superfield, free from the Ostrogradsky instability and the auxiliary field problem. For all the kinds of modulated vacua, SUSY is spontaneously broken and the fermion in the chiral superfield becomes a Goldstino. We further investigate the stability of the modulated vacua. The vacua are (meta)stable if the vacuum energy density is non-negative. However, the vacua become unstable due to the presence of the ghost Goldstino if the vacuum energy density is negative. Finally, we derive the relation between the presence of the ghost Goldstino and the negative vacuum energy density in the modulated vacua using the SUSY algebra.

本文言語English
論文番号045012
ジャーナルPhysical Review D
99
4
DOI
出版ステータスPublished - 2019 2 15

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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