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Towards a dark sector model from string theory
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DOI：10.1088/1475-7516/2022/09/040.png)
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摘要
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An embedding of a unified dark sector model into string theory with the following features is proposed: the model-independent axion descending from the Kalb-Ramond 2-form field is identified with the dark-matter field, and the real part of a Kahler modulus field - the radius of one of the extra spatial dimensions - accounts for dark energy. The expectation value of the dilaton field is stabilized by a gaugino condensation mechanism. A dark-energy potential with an amplitude corresponding to a realistic low energy scale results from some gentle tuning of the stabilized expectation value of the dilaton. The resulting potential reproduces the one in a previous dark-sector model proposed by two of us. Challenges to obtain a sufficiently flat potential are discussed.
Keyword:
string theory and cosmology
dark energy theory
dark matter theory
期刊
IF:
5.9
论文数:
1.3W
被引数:
4.7W
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