Authors: Jiro Soda Hideo Kodama Masato Nozawa
Publish Date: 2011/08/17
Volume: 2011, Issue: 8, Pages: 67-
Abstract
We study parity violation in graviton nongaussianity generated during inflation We develop a useful formalism to calculate graviton nongaussianity Using this formalism we explicitly calculate the parity violating part of the bispectrum for primordial gravitational waves in the exact de Sitter spacetime and prove that no parity violation appears in the nongaussianity We also extend the analysis to slowroll inflation and find that the parity violation of the bispectrum is proportional to the slowroll parameter We argue that parity violating nongaussianity can be tested by the CMB Our results are also useful for calculating threepoint function of the stress tensor in the nonconformal field theory through the gravity/field theory correspondence
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