COBE Differential Microwave Radiometer Constraints on an Inflation Model with Nonminimal Scalar Field

Details COBE Differential Microwave Radiometer Constraints on an Inflation Model with Nonminimal Scalar Field COBE Differential Microwave Radiometer Constraints on an Inflation Model with Nonminimal Scalar Field

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phrvl..81.5274h&link_type=abstract

Physical Review Letters, Volume 81, Issue 24, December 14, 1998, pp.5274-5277

Physics

20

Scientific paper

We derive the power spectra of the scalar- and tensor-type structures generated in a chaotic-type inflation model based on nonminimally coupled scalar field with a self-interaction. By comparing contributions of both structures to the anisotropy of the cosmic microwave background radiation with the four-year COBE differential microwave radiometer data on quadrupole anisotropy we derive constraints on the ratio of self-coupling and nonminimal coupling constants, and the expansion rate in the inflation era. The requirement for a successful amount of inflation further constrains the relative amount of a tensor-type contribution.

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