Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 75, Issue 6, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-015-3452-3
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Funding
- Council of Scientific and Industrial Research, India [09/093(0132)/2010]
- Council of Scientific and Industrial Research, India [09/093(0132)/2010]
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We have studied primordial non-Gaussian features of a model of potential-driven single field DBI Galileon inflation. We have computed the bispectrum from the three-point correlation function considering all possible cross correlations between the scalar and tensor modes of the proposed setup. Further, wehave computed the trispectrum from a four-point correlation function considering the contribution from contact interaction, and scalar and graviton exchange diagrams in the in-in picture. Finally we have obtained the non-Gaussian consistency conditions from the four-point correlator, which results in partial violation of the Suyama-Yamaguchi four-point consistency relation. This further leads to the conclusion that sufficient primordial non-Gaussianities can be obtained from DBI Galileon inflation.
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