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摘要
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We show that inflation which is dominated by the D-term density avoids the 'slow-roll' problem of inflation in supergravity. Such an inflationary scenario can naturally emerge in theories with non-anomalous or anomalous U(1) gauge symmetry. In the latter case the scale of inflation is fixed by the Green-Schwarz mechanism of anomaly cancellation. The crucial point is that the (super)gravity-mediated curvature of all the scalar fields (and, in particular, of the inflaton), which in the standard F-dominated case is of the order of the Hubble parameter, is absent in the D-term inflation case. The curvature of moduli and of all other flat directions during such an inflation crucially depends on their gauge charges.
Keyword:
LARGE-SCALE STRUCTURE
YANG-MILLS THEORIES
COSMOLOGICAL PROBLEMS
SUPERSTRING MODELS
CHAOTIC INFLATION
NATURAL INFLATION
PARTICLE PHYSICS
ENTROPY CRISIS
SUPERGRAVITY
BREAKING
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期刊
IF:
4.5
论文数:
3.2W
被引数:
7.3W
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