Non-commutative Geometry Modified Non-Gaussianities of Cosmological Perturbation
| dc.creator | Fang, Kejie | |
| dc.creator | Chen, Bin | |
| dc.creator | Xue, Wei | |
| dc.date | 2007-07-13 | |
| dc.date | 2008-01-13 | |
| dc.date.accessioned | 2026-07-07T12:13:37Z | |
| dc.date.available | 2026-07-07T12:13:37Z | |
| dc.description | We investigate the noncommutative effect on the non-Gaussianities of primordial cosmological perturbation. In the lowest order of string length and slow-roll parameter, we find that in the models with small speed of sound the noncommutative modifications could be observable if assuming a relatively low string scale. In particular, the dominant modification of non-Gaussianity estimator f_{NL} could reach O(1) in DBI inflation and K-inflation. The corrections are sensitive to the speed of sound and the choice of string length scale. Moreover the shapes of the corrected non-Gaussianities are distinct from that of ordinary ones. | |
| dc.description | 26 pages, 3 figures Added references, changed content | |
| dc.identifier | https://arxiv.org/abs/0707.1970 | |
| dc.identifier | http://arxiv.org/abs/0707.1970 | |
| dc.identifier | Phys.Rev.D77:063523,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.77.063523 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/210907 | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Non-commutative Geometry Modified Non-Gaussianities of Cosmological Perturbation | |
| dc.type | text |