Beam Dump Experiment at Future Electron-Positron Colliders

Abstract

We propose a new beam dump experiment at future colliders with electron ($e^{-}$) and positron ($e^{+}$) beams, BDee, which will provide a new possibility to search for hidden particles, like hidden photon. If a particle detector is installed behind the beam dump, it can detect the signal of in-flight decay of the hidden particles produced by the scatterings of $e^{\pm }$ beams off materials for dumping. We show that, compared to past experiments, BDee (in particular BDee at $e^{+}{e}^{-}$ linear collider) significantly enlarges the parameter region where the signal of the hidden particle can be discovered.

Comments: 4 pages, 2 figures