Blast from the past: Constraints on the dark sector from the BEBC WA66 beam dump experiment

Marocco, Giacomo; Sarkar, Subir

doi:10.21468/SciPostPhys.10.2.043

SciPost Physics

Blast from the past: Constraints on the dark sector from the BEBC WA66 beam dump experiment

Giacomo Marocco, Subir Sarkar

SciPost Phys. 10, 043 (2021) · published 19 February 2021

doi: 10.21468/SciPostPhys.10.2.043
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Submissions/Reports

Abstract

We derive limits on millicharged dark states, as well as particles with electric or magnetic dipole moments, from the number of observed forward electron scattering events at the Big European Bubble Chamber in the 1982 CERN-WA-066 beam dump experiment. The dark states are produced by the 400~GeV proton beam primarily through the decays of mesons produced in the beam dump, and the lack of excess events places bounds extending up to GeV masses. These improve on bounds from all other experiments, in particular CHARM~II.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.10.2.043
TI  - Blast from the past: Constraints on the dark sector from the BEBC WA66 beam dump experiment
PY  - 2021/02/19
UR  - https://scipost.org/SciPostPhys.10.2.043
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 10
IS  - 2
SP  - 043
A1  - Marocco, Giacomo
AU  - Sarkar, Subir
AB  - We derive limits on millicharged dark states, as well as particles with electric or magnetic dipole moments, from the number of observed forward electron scattering events at the Big European Bubble Chamber in the 1982 CERN-WA-066 beam dump experiment. The dark states are produced by the 400~GeV proton beam primarily through the decays of mesons produced in the beam dump, and the lack of excess events places bounds extending up to GeV masses. These improve on bounds from all other experiments, in particular CHARM~II.
ER  -

@Article{10.21468/SciPostPhys.10.2.043,
	title={{Blast from the past: Constraints on the dark sector from the BEBC WA66 beam dump experiment}},
	author={Giacomo Marocco and Subir Sarkar},
	journal={SciPost Phys.},
	volume={10},
	pages={043},
	year={2021},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.10.2.043},
	url={https://scipost.org/10.21468/SciPostPhys.10.2.043},
}

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¹ Giacomo Marocco,
¹ Subir Sarkar

¹ Rudolf Peierls Centre for Theoretical Physics, University of Oxford