We derive a direct correlation between the power spectrum and bispectrum of the primordial curvature perturbation in terms of the Goldstone mode based on the effective field theory approach to inflation. We show examples of correlated bispectra for the parametrized feature models presented by the Planck collaboration. We also discuss the consistency relation and the validity of our explicit correlation between the power spectrum and bispectrum.
Bibliographical noteFunding Information:
J.G. thanks Tokyo Institute of Technology for hospitality during Workshop on Particle Physics, Cosmology, and Gravitation where this work was initiated. J.G. acknowledges the support from the Korea Ministry of Education, Science and Technology, Gyeongsangbuk-Do and Pohang City for Independent Junior Research Groups at the Asia Pacific Center for Theoretical Physics. J.G. is also supported in part by a TJ Park Science Fellowship of POSCO TJ Park Foundation and the Basic Science Research Program through the National Research Foundation of Korea (NRF) Research Grant NRF-2016R1D1A1B03930408. M.Y. is supported in part by Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for Scientific Research Nos.25287054 and 26610062, and the Grant-in-Aid for Scientific Research on Innovative Areas Cosmic Acceleration No.15H05888.
© 2017 American Physical Society.