期刊
PHYSICS LETTERS B
卷 734, 期 -, 页码 13-16出版社
ELSEVIER
DOI: 10.1016/j.physletb.2014.05.012
关键词
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资金
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan [22244021]
- World Premier International Research Center Initiative (WPI Inititative), MEXT, Japan
- JSPS Research Fellowships
The BICEP2 collaboration has recently reported a large tensor fluctuation in the cosmic microwave background, which suggests chaotic inflation models. In this letter, we reconsider the chaotic inflation model in the supergravity. We introduce a non-holomorphic shift-symmetry breaking parameter, which we expect to exist in general, and discuss its effect on the inflaton dynamics. We show that the model predicts a sizable deviation from the original chaotic inflation model and the predicted tensor fluctuation can lie between the BICEP2 result and the upper bound give by the Planck experiment with a small shift-symmetry breaking paramter. The model is characterized by only two parameters, which yields predictability and testability in future experiments.
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