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Scalar effective Lagrangian in de Sitter space
Phys. Rev. D 13, 224 – Published 15 January, 1976
DOI: https://doi.org/10.1103/PhysRevD.13.224
Abstract
Scalar field theory is considered in a de Sitter-space background and the effective Lagrangian calculated exactly using the proper-time regularization technique. The imaginary part vanishes and this result is shown to hold for all spins on quite general grounds.
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