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Does Inflationary Particle Production suggest Omega_m < 1?

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arxiv hep-ph/9808204 v1 pith:7ZQHGBHP submitted 1998-08-02 hep-ph astro-phgr-qc

classification hep-phastro-phgr-qc
keywords omegacosmologicaldensityinflationaryparticleproductionalterbehaves
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We study a class of FRW spacetimes with a nonminimally coupled light massive scalar field. Values of the coupling parameter xi<0 enhance long range power in the vacuum expectation value of the energy-momentum tensor and fundamentally alter the nature of inflationary particle production: the energy density of created particles behaves like an effective cosmological constant, leading generically to Omega_m < 1 in clustered matter and providing a possible resolution of the ``Omega problem'' for low density cosmological models.

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