Andreev, YM;
Banerjee, D;
Banto Oberhauser, B;
Bernhard, J;
Bisio, P;
Bondí, M;
Celentano, A;
... Zhevlakov, AS; + view all
(2023)
Measurement of the intrinsic hadronic contamination in the NA64−e high-e+/e- purity beam at CERN.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
, 1057
, Article 168776. 10.1016/j.nima.2023.168776.
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Abstract
We present the measurement of the intrinsic hadronic contamination at the CERN SPS H4 beamline configured to transport electrons and positrons at 100 GeV/c. The analysis, performed using data collected by the NA64-e experiment in 2022, is based on calorimetric measurements, exploiting the different interaction mechanisms of electrons and hadrons in the NA64 detector. We determined the contamination by comparing the results obtained using the nominal electron/positron beamline configuration with those from a dedicated setup, in which only hadrons impinged on the detector. We also obtained an estimate of the relative protons, anti-protons and pions yield by exploiting the different absorption probabilities of these particles in matter. We cross-checked our results with a dedicated Monte Carlo simulation for the hadron production at the primary T2 target, finding a good agreement with the experimental measurements.
| Type: | Article |
|---|---|
| Title: | Measurement of the intrinsic hadronic contamination in the NA64−e high-e+/e- purity beam at CERN |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.nima.2023.168776 |
| Publisher version: | https://doi.org/10.1016/j.nima.2023.168776 |
| Language: | English |
| Additional information: | © 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Light dark matter, Missing-energy experiment, H4 beamline, Hadron contamination |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10180045 |
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