科研之友
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摘要
The minimal supersymmetric (or F-term) hybrid inflation is defined by a unique renormalizable superpotential, fixed by a U(1) R-symmetry, and it employs a canonical Kahler potential. The inflationary potential takes into account both radiative and supergravity corrections, as well as an important soft supersymmetry breaking term, with a mass coefficient in the range (0.1-10) TeV. The latter term assists in obtaining a scalar spectral index n(s) close to 0.96, as strongly suggested by the PLANCK and WMAP 9 yr measurements. The minimal model predicts that the tensor-to-scalar r is extremely tiny, of order 10(-12), while the spectral index running, vertical bar dn(s)/d ln k vertical bar similar to 10(-4). If inflation is associated with the breaking of a local U(1)(B-L) symmetry, the corresponding symmetry breaking scale M is (0.7-1.6).10(15) GeV with n(s) similar or equal to 0.96. This scenario is compatible with the bounds on M from cosmic strings, formed at the end of inflation from B - L symmetry breaking. We briefly discuss non-thermal leptogenesis which is readily implemented in this class of models.
- 出版日期2013-10
