期刊
PHYSICS LETTERS B
卷 536, 期 1-2, 页码 1-8出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0370-2693(02)01835-X
关键词
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We discuss the signature of the scale of short distance physics in the Cosmic Microwave Background. In addition to effects which depend on the ratio of Hubble scale H during inflation to the energy scale M of the short distance physics, there can be effects which depend on phi(2)/M-4 where phi is the classical background of the inflaton field. Therefore, the imprints of short distance physics on the spectrum of Cosmic Microwave Background anisotropies generically involve a double expansion. We present some examples of a single scalar field with E-her order kinetic terms coupled to Einstein gravity, and illustrate that the effects of short distance physics on the Cosmic Microwave Back-round can be substantial even for H << M, and generically involve corrections that are not simply powers of H/M. The size of such effects can depend on the short distance scale nonanalytically even though the action is local. (C) 2002 Published by Elsevier Science B.V.
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