Dark matter interacting via a massive spin-2 mediator in warped extra-dimensions
arXiv:2105.06794 · doi:10.1007/JHEP11(2021)036
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 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 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.
21 pages + 2 appendices, 10 figures
References in corpus (10)
- micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
- Search for new phenomena in high-mass diphoton final states using 37 fb of proton-proton collisions collected at TeV with the ATLAS detector
- Toward (Finally!) Ruling Out Z and Higgs Mediated Dark Matter Models
- Heavy spin-2 Dark Matter
- Gravity-Mediated Dark Matter Annihilation in the Randall-Sundrum Model
- TASI 2004 Lectures on the Phenomenology of Extra Dimensions
- Sum Rules for Massive Spin-2 Kaluza-Klein Elastic Scattering Amplitudes
- Spin-2 KK Mode Scattering in Models with a Massive Radion
- A warped scalar portal to fermionic dark matter
- On Tree-Level Unitarity in Theories of Massive Spin-2 Bosons