Dark matter interacting via a massive spin-2 mediator in warped extra-dimensions
Abstract
We study dark matter interacting via a massive spin-2 mediator. To have a consistent effective theory for the spin-2 particle, we work in a warped extra-dimensional model such that the mediator(s) are the Kaluza-Klein (KK) modes of the 5D graviton. We pay close attention to dark matter annihilations into KK-gravitons. Due to the high energy behavior of longitudinal modes of spin-2 fields, these channels exhibit a tremendous growth at large center of mass energies √{s } if only one spin-2 mediator is considered. For the first time, we include the full KK-tower in this dark matter production process and find that this growth is unphysical and cancels once the full field content of the extra-dimensional theory is taken into account. Interestingly, this implies that it is not possible to approximate the results obtained in the full theory with a reduced set of effective interactions once √{s } is greater than the first graviton mass. This casts some doubt on the universal applicability of previous studies with spin-2 mediators within an EFT framework and prompts us to revisit the phenomenological allowed parameter space of gravitationally interacting scalar dark matter in warped extra-dimensions.
- Publication:
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Journal of High Energy Physics
- Pub Date:
- November 2021
- DOI:
- 10.1007/JHEP11(2021)036
- arXiv:
- arXiv:2105.06794
- Bibcode:
- 2021JHEP...11..036D
- Keywords:
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- Beyond Standard Model;
- Cosmology of Theories beyond the SM;
- Effective Field Theories;
- High Energy Physics - Phenomenology
- E-Print:
- 21 pages + 2 appendices, 10 figures