Beam Dump Experiment at Future Electron-Positron Colliders

TL;DR

The paper proposes a new beam dump experiment at future electron-positron colliders, enhancing the search for hidden particles like hidden photons by detecting their decay signals, thereby expanding discovery potential.

Contribution

It introduces the BDee experiment concept at future colliders, providing a novel method to search for hidden particles with improved sensitivity over past experiments.

Findings

BDee significantly enlarges the parameter space for hidden photon detection.

The experiment can detect signals from in-flight decay of hidden particles.

BDee at $e^+e^-$ colliders offers enhanced discovery prospects.

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.