Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-06-22
Class.Quant.Grav.17:4269-4338,2000; Erratum-ibid.21:5017,2004
Physics
High Energy Physics
High Energy Physics - Theory
81 pages, 4 figures, using epsf; v2: changing sentence with reference on page 3, formatting changes, and rephrasing a few sent
Scientific paper
10.1088/0264-9381/17/20/308
We introduce the general N=1 gauge theory superconformally coupled to supergravity. The theory has local SU(2,2|1) symmetry and no dimensional parameters. The superconformal origin of the Fayet-Iliopoulos terms is clarified. The phase of this theory with spontaneously broken conformal symmetry gives various formulations of N=1 supergravity interacting with matter, depending on the choice of the R-symmetry fixing. We have found that the locally superconformal theory is useful for describing the physics of the early universe with a conformally flat FRW metric. Few applications of superconformal theory to cosmology include the study of i) particle production after inflation, particularly the non-conformal helicity 1/2 states of gravitino, ii) the super-Higgs effect in cosmology and the derivation of the equations for the gravitino interacting with any number of chiral and vector multiplets in the gravitational background with varying scalar fields, iii) the weak coupling limit of supergravity and gravitino-goldstino equivalence. This explains why gravitino production in the early universe is not suppressed in the limit of weak gravitational coupling. We discuss the possible existence of an unbroken phase of the superconformal theories, interpreted as a strong coupling limit of supergravity.
Kallosh Renata
Kofman Lev
Linde Andrei
Proeyen Antoine Van
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