Dark radiation and dark matter in large volume compactifications

Tetsutaro Higaki, Fuminobu Takahashi

研究成果: Article査読

87 被引用数 (Scopus)

抄録

We argue that dark radiation is naturally generated from the decay of the overall volume modulus in the LARGE volume scenario. We consider both sequestered and non-sequestered cases, and find that the axionic superpartner of the modulus is produced by the modulus decay and it can account for the dark radiation suggested by observations, while the modulus decay through the Giudice-Masiero term gives the dominant contribution to the total decay rate. In the sequestered case, the lightest supersymmetric particles produced by the modulus decay can naturally account for the observed dark matter density. In the non-sequestered case, on the other hand, the supersymmetric particles are not produced by the modulus decay, since the soft masses are of order the heavy gravitino mass. The QCD axion will then be a plausible dark matter candidate.

本文言語English
論文番号125
ジャーナルJournal of High Energy Physics
2012
11
DOI
出版ステータスPublished - 2012

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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