| Автор | JoAnne L. Hewett |
| Автор | Thomas G. Rizzo |
| Дата выпуска | 2007-12-01 |
| dc.description | Recent studies have shown that the poor perturbative behavior of General Relativity in the ultraviolet regime may be ameliorated by the existence of a non-Gaussian fixed point which renders the theory asymptotically safe and possibly non-perturbatively renormalizable. This results in a running of the (effective) gravitational coupling such that gravity becomes weaker at high energies. We parameterize this effective coupling with a form factor and study its consequences at the LHC and ILC in models with large extra dimensions or warped extra dimensions. We find significant effects in the processes of Kaluza-Klein (KK) graviton exchange or resonant KK graviton production in both the Drell-Yan reaction as well as in e<sup>+</sup>e<sup>−</sup>ff̅. On the otherhand, processes leading to KK graviton emission show qualitatively less sensitivity to the presence of a form factor. In addition, we examine tree-level perturbative unitarity in 22 gravity-mediated scattering and find that this form factor produces a far better behaved amplitude at large center of mass energies. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Collider signals of gravitational fixed points |
| Тип | paper |
| DOI | 10.1088/1126-6708/2007/12/009 |
| Electronic ISSN | 1029- 8479 |
| Print ISSN | 1126-6708 |
| Журнал | Journal of High Energy Physics |
| Том | 2007 |
| Первая страница | 9 |
| Последняя страница | 009 |
| Аффилиация | JoAnne L. Hewett; Stanford Linear Accelerator Center, 2575 Sand Hill Rd., Menlo Park, CA, 94025, U.S.A. |
| Аффилиация | Thomas G. Rizzo; Stanford Linear Accelerator Center, 2575 Sand Hill Rd., Menlo Park, CA, 94025, U.S.A. |
| Выпуск | 12 |
