TY  - JOUR
AU  - Andreev, Y. M. et al
AU  - Molina Bueno, L.
AU  - Tuzi, M.
PY  - 2023
DA  - 2023//
TI  - Measurement of the intrinsic hadronic contamination in the NA64-e high-purity e+/e- beam at CERN
T2  - Nucl. Instrum. Methods Phys. Res. A
JO  - Nuclear Instruments & Methods in Physics Research A
SP  - 168776
EP  - 8pp
VL  - 1057
PB  - Elsevier
KW  - Light dark matter
KW  - Missing-energy experiment
KW  - H4 beamline
KW  - Hadron contamination
AB  - 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, antiprotons 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.
SN  - 0168-9002
UR  - https://arxiv.org/abs/2305.19411
UR  - https://doi.org/10.1016/j.nima.2023.168776
DO  - 10.1016/j.nima.2023.168776
LA  - English
N1  - WOS:001154863600001
ID  - Andreev_etal2023
ER  -