Large non-Gaussianities with intermediate shapes from quasi-single-field inflation
We study the slow-roll inflation models, where the inflaton slow-rolls along a trajectory whose orthogonal directions are lifted by potentials with masses of order the Hubble parameter. In these models large non-Gaussianities can be generated through the transformation from the isocurvature modes to...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/58620 |
| _version_ | 1811088840601894912 |
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| author | Chen, Xingang Wang, Yi |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Chen, Xingang Wang, Yi |
| author_sort | Chen, Xingang |
| collection | MIT |
| description | We study the slow-roll inflation models, where the inflaton slow-rolls along a trajectory whose orthogonal directions are lifted by potentials with masses of order the Hubble parameter. In these models large non-Gaussianities can be generated through the transformation from the isocurvature modes to the curvature mode, once the inflaton trajectory turns. We find large bispectra with a one-parameter family of novel shapes, interpolating between the equilateral and local shape. According to the in-in formalism, the shapes of these non-Gaussianities are different from a simple projection from the isocurvature non-Gaussian correlation functions. |
| first_indexed | 2024-09-23T14:08:19Z |
| format | Article |
| id | mit-1721.1/58620 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:08:19Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/586202022-10-01T19:25:23Z Large non-Gaussianities with intermediate shapes from quasi-single-field inflation Chen, Xingang Wang, Yi Massachusetts Institute of Technology. Center for Theoretical Physics Chen, Xingang Chen, Xingang We study the slow-roll inflation models, where the inflaton slow-rolls along a trajectory whose orthogonal directions are lifted by potentials with masses of order the Hubble parameter. In these models large non-Gaussianities can be generated through the transformation from the isocurvature modes to the curvature mode, once the inflaton trajectory turns. We find large bispectra with a one-parameter family of novel shapes, interpolating between the equilateral and local shape. According to the in-in formalism, the shapes of these non-Gaussianities are different from a simple projection from the isocurvature non-Gaussian correlation functions. United States. Dept. of Energy (DEFG02- 05ER41360) National Natural Science Foundation (China) Natural Sciences and Engineering Research Council of Canada IIP 2010-09-21T15:21:06Z 2010-09-21T15:21:06Z 2010-03 2010-10 Article http://purl.org/eprint/type/JournalArticle 1550-7998 1550-2368 http://hdl.handle.net/1721.1/58620 Chen, Xingang, and Yi Wang. "Large non-Gaussianities with intermediate shapes from quasi-single-field inflation." Physical Review D 81.6 (2010): 063511. © 2010 The American Physical Society. en_US http://dx.doi.org/10.1103/PhysRevD.81.063511 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Chen, Xingang Wang, Yi Large non-Gaussianities with intermediate shapes from quasi-single-field inflation |
| title | Large non-Gaussianities with intermediate shapes from quasi-single-field inflation |
| title_full | Large non-Gaussianities with intermediate shapes from quasi-single-field inflation |
| title_fullStr | Large non-Gaussianities with intermediate shapes from quasi-single-field inflation |
| title_full_unstemmed | Large non-Gaussianities with intermediate shapes from quasi-single-field inflation |
| title_short | Large non-Gaussianities with intermediate shapes from quasi-single-field inflation |
| title_sort | large non gaussianities with intermediate shapes from quasi single field inflation |
| url | http://hdl.handle.net/1721.1/58620 |
| work_keys_str_mv | AT chenxingang largenongaussianitieswithintermediateshapesfromquasisinglefieldinflation AT wangyi largenongaussianitieswithintermediateshapesfromquasisinglefieldinflation |