| Автор | Alan Chodos |
| Автор | Erich Poppitz |
| Автор | Dimitrios Tsimpis |
| Дата выпуска | 2000-09-21 |
| dc.description | We consider deformations of the singular `global cosmic string' compactifications, known to naturally generate exponentially large scales. The deformations are obtained by allowing a constant-curvature metric on the brane and correspond to a choice of integration constant. We show that there exists a unique value of the integration constant that gives rise to a non-singular solution. The metric on the brane is dS<sub>4</sub> with an exponentially small value of the expansion parameter. We derive an upper bound on the brane cosmological constant. We find and investigate more general singular solutions - `dilatonic global string' compactifications - and show that they can have non-singular deformations. We give an embedding of these solutions in type IIB supergravity. There is only one class of supersymmetry-preserving singular dilatonic solutions. We show that they do not have non-singular deformations of the type considered here. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Non-singular deformations of singular compactifications, the cosmological constant and the hierarchy problem |
| Тип | paper |
| DOI | 10.1088/0264-9381/17/18/319 |
| Electronic ISSN | 1361-6382 |
| Print ISSN | 0264-9381 |
| Журнал | Classical and Quantum Gravity |
| Том | 17 |
| Первая страница | 3865 |
| Последняя страница | 3879 |
| Аффилиация | Alan Chodos; Department of Physics, Yale University, New Haven, CT 06520-8120, USA |
| Аффилиация | Erich Poppitz; Department of Physics, Yale University, New Haven, CT 06520-8120, USA |
| Аффилиация | Dimitrios Tsimpis; Department of Physics, Yale University, New Haven, CT 06520-8120, USA |
| Выпуск | 18 |
