Massive fermion production in nonsingular superstring cosmology

Shinji Tsujikawa*, Hiroki Yajima

*この研究の対応する著者

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We study massive spin-1/2 fermion production in nonsingular superstring cosmology, taking into account one-loop quantum corrections to a superstring effective action with dilaton and modulus fields. While no creation occurs in the massless limit, massive fermions can be produced by the existence of a time-dependent frequency. Because of the increase of the Hubble expansion rate during the modulus-driven phase, the occupation number of fermions continues to grow until the point of the graceful exit, after which fermion creation ceases with the decrease of the Hubble rate.

本文言語English
論文番号023519
ジャーナルPhysical Review D
64
2
DOI
出版ステータスPublished - 2001
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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