Measurement of the intrinsic hadronic contamination in the NA64−e high-purity e+/e− beam at CERN

Andreev, Yu. M.Banerjee, D.Banto Oberhauser, B.Bernhard, J.Bisio, P.Bondí, M.Celentano, A.Charitonidis, N.Chumakov, A. G.Cooke, D.Crivelli, P.Depero, E.Dermenev, A. V.Donskov, S. V.Dusaev, R. R.Enik, T.Frolov, V. N.Gardikiotis, A.Gerassimov, S. G.Gninenko, S. N.Hösgen, M.Jeckel, M.Kachanov, V. A.Kambar, Y.Karneyeu, A. E.Kekelidze, G.Ketzer, B.Kirpichnikov, D. V.Kirsanov, M. M.Kolosov, V. N.Konorov, I. V.Gertsenberger, S. V.Kasianova, E. A.Kovalenko, S. G.Kramarenko, V. A.Kravchuk, L. V.Krasnikov, N. V.Kuleshov, S. V.Lyubovitskij, V. E.Lysan, V.Marini, A.Marsicano, L.Matveev, V. A.Mikhailov, Yu. V.Molina Bueno, L.Mongillo, M.Peshekhonov, D. V.Polyakov, V. A.Radics, B.Rojas, R.Salamatin, K.Samoylenko, V. D.Sieber, H.Shchukin, D.Soto, O.Tikhomirov, V. O.Tlisova, I.Toropin, A. N.Trifonov, A. Yu.Tuzi, M.Ulloa, P.Vasilishin, B. I.Vasquez Arenas, G.Volkov, P. V.Volkov, V. Yu.Voronchikhin, I. V.Zamora-Saá, J.Zhevlakov, A. S.2023-10-242023-10-242023-12Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume 1057 December 2023 Article number 1687760168-9002https://repositorio.unab.cl/xmlui/handle/ria/53579Indexación: ScopusWe 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.enH4 beamlineHadron contaminationLight dark matterMissing-energy experimentMeasurement of the intrinsic hadronic contamination in the NA64−e high-purity e+/e− beam at CERNArtículoCC BY-NC-ND 4.0 CÓDIGO LEGAL Atribución-NoComercial-SinDerivadas 4.0 Internacional10.1016/j.nima.2023.168776