Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.10168 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914384409788416 |
|---|---|
| author | Chiesa, Angelo P. Pawlowski, Jan M. Reichert, Manuel |
| author_facet | Chiesa, Angelo P. Pawlowski, Jan M. Reichert, Manuel |
| contents | We compute the graviton-mediated two-to-two scattering amplitude and cross section for scalar particles in asymptotically safe quantum gravity. Specifically, we compute the full momentum dependence of the scalar-graviton three-point scattering vertex for spacelike momenta with the functional renormalisation group. We also discuss the analytic continuation to the Minkowski branch, and in particular its angular dependence. Then, the timelike part of the vertex is reconstructed and used to compute the scattering amplitude and cross-section. We show that the cross-section reduces to that in General Relativity at small energies, and it respects unitarity in the UV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_10168 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Towards Two-to-Two Scattering of Scalars in Asymptotically Safe Quantum Gravity Chiesa, Angelo P. Pawlowski, Jan M. Reichert, Manuel High Energy Physics - Theory We compute the graviton-mediated two-to-two scattering amplitude and cross section for scalar particles in asymptotically safe quantum gravity. Specifically, we compute the full momentum dependence of the scalar-graviton three-point scattering vertex for spacelike momenta with the functional renormalisation group. We also discuss the analytic continuation to the Minkowski branch, and in particular its angular dependence. Then, the timelike part of the vertex is reconstructed and used to compute the scattering amplitude and cross-section. We show that the cross-section reduces to that in General Relativity at small energies, and it respects unitarity in the UV. |
| title | Towards Two-to-Two Scattering of Scalars in Asymptotically Safe Quantum Gravity |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2603.10168 |