Hybrid inflation followed by modular inflation

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dc.creatorLazarides, George
dc.date2007-06-11
dc.date2007-09-21
dc.date.accessioned2026-07-07T11:41:16Z
dc.date.available2026-07-07T11:41:16Z
dc.descriptionInflationary models with a superheavy scale F-term hybrid inflation followed by an intermediate scale modular inflation are considered. The restrictions on the power spectrum P_R of curvature perturbation and the spectral index n_s from the recent data within the power-law cosmological model with cold dark matter and a cosmological constant can be met provided that the number of e-foldings N_HI* suffered by the pivot scale k_*=0.002/Mpc during hybrid inflation is suitably restricted. The additional e-foldings needed for solving the horizon and flatness problems are generated by modular inflation with a string axion as inflaton. For central values of P_R and n_s, the grand unification scale comes out, in the case of standard hybrid inflation, close to its supersymmetric value M_GUT=2.86 x 10^16 GeV, the relevant coupling constant is relatively large (0.005-0.14), and N_HI* is between 10 and 21.7. In the shifted [smooth] hybrid inflation case, the grand unification scale can be identified with M_GUT for N_HI*=21 [N_HI*=18].
dc.description13 pages including 3 figures, uses ws-ijmpa.cls, minor corrections included, talk given at the CTP Symposium on Supersymmetry at LHC: Theoretical and Experimental Perspectives, British University in Egypt (BUE), Cairo, 11-14 March 2007 (to appear in the proceedings)
dc.identifierhttps://arxiv.org/abs/0706.1436
dc.identifierhttp://arxiv.org/abs/0706.1436
dc.identifierInt.J.Mod.Phys.A22:5747-5759,2007
dc.identifierdoi:10.1142/S0217751X07038980
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200477
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleHybrid inflation followed by modular inflation
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