What can we learn by probing Trans-Planckian physics
| dc.creator | Bastero-Gil, M. | |
| dc.date | 2001-06-13 | |
| dc.date.accessioned | 2026-07-07T03:44:46Z | |
| dc.date.available | 2026-07-07T03:44:46Z | |
| dc.description | In this talk we address the issue of how the observables in our present Universe are affected by processes that may have occured at superplanckian energies (referred to as the {\it transplanckian regime}). For example, the origin of the cosmological perturbation spectrum. We model the transplanckian regime by introducing a 1-parameter family of smooth non-linear dispersion relations which modify the frequencies at very short distances. For this family of dispersions, we present the exact solutions and show that the CMBR spectrum is that of a (nearly) black body, and that the adiabatic vacuum is the only choice for the initial conditions. A particular feature of the family of dispersion functions chosen is the production of ultralow frequencies at very high momenta $k$ (for $k>M_P$). Modes with ultralow frequencies equal or less than the current Hubble rate are still frozen today. Therefore, their energy today provides a strong candidate for the dark energy of the Universe. | |
| dc.description | 6 pages, 1 figures. Given at CICHEP-01, Cairo, Jan. 2001; to be published by Rinton Press in CICHEP-01 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0106133 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0106133 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/40700 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | What can we learn by probing Trans-Planckian physics | |
| dc.type | text |