Resonant probing spin-0 and spin-2 dark matter mediators with fixed target experiments
High Energy Physics - Phenomenology
2023-07-12 v2
Abstract
We discuss the mechanism to produce electron-specific dark matter mediators of spin-0 and spin-2 in the electron fixed target experiments such as NA64 and LDMX. The secondary positrons induced by the electromagnetic shower can produce the mediators via annihilation on atomic electrons. That mechanism, for some selected kinematics, results in the enhanced sensitivity with respect to the bounds derived by the bremsstrahlunglike emission of the mediator in the specific parameter space. We derive the corresponding experimental reach of the NA64 and LDMX.
Cite
@article{arxiv.2304.14052,
title = {Resonant probing spin-0 and spin-2 dark matter mediators with fixed target experiments},
author = {I. V. Voronchikhin and D. V. Kirpichnikov},
journal= {arXiv preprint arXiv:2304.14052},
year = {2023}
}
Comments
12 pages, 7 figures. Typos are corrected, efficiencies are added, the version is accepted for publication in PRD