Study of proton–nucleus interactions in the DsTau/NA65 experiment at the CERN-SPS

Abstract The DsTau(NA65) experiment at CERN was proposed to measure an inclusive differential cross-section of $$D_s$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>D</mml:mi> <mml:mi>s</mml:mi> </mml:msub> </mml:math> production with decay to tau lepton and tau neutrino in p – A interactions. The DsTau detector is based on the nuclear emulsion technique, which provides excellent spatial resolution for detecting short-lived particles like charmed hadrons. This paper presents the first results of the analysis of the pilot-run (2018 run) data and reports the accuracy of the proton interaction vertex reconstruction. High precision in vertex reconstruction enables detailed measurement of proton interactions, even in environments with high track density. The measured data has been compared with several Monte Carlo event generators in terms of multiplicity and angular distribution of charged particles. The multiplicity distribution obtained in p–W interactions is tested for KNO-G scaling and is found to be nearly consistent. The interaction length of protons in tungsten is measured to be $$93.7 \pm 2.6~\text {mm}.$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>93.7</mml:mn> <mml:mo>±</mml:mo> <mml:mn>2.6</mml:mn> <mml:mspace/> <mml:mtext>mm</mml:mtext> <mml:mo>.</mml:mo> </mml:mrow> </mml:math> The results presented in this study can be used to validate event generators of p – A interactions.

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Publication Details

Journal
The European Physical Journal C
Published
2025-03-05
DOI
https://doi.org/10.1140/epjc/s10052-025-13928-1
Primary Topic
Particle physics theoretical and experimental studies
Type
article
Field-Weighted Citation Impact
0.00

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article

Study of proton–nucleus interactions in the DsTau/NA65 experiment at the CERN-SPS

Manato Miura, Y. Gornushkin, S. Vasina, A. M. Guler et al.
The European Physical Journal C
Particle physics theoretical and experimental studies
article

Study of proton–nucleus interactions in the DsTau/NA65 experiment at the CERN-SPS

Manato Miura, Y. Gornushkin, S. Vasina, A. M. Guler, Alina-Tania Neagu, S. Aoki, T. Ariga, K. Kodama, M. Komatsu, Emin Yuksel, Elena Firu, Sergey Dmitrievsky, U. Köse, Canay Oz, Hiroki Rokujo, Nezihe Başak Ergin, Toranosuke Okumura, Masahiro Yoshimoto, Radu Dobre, Felix Kling, N. Charitonidis, Osamu Sato, Toshiyuki Nakano, A. Ariga, D. Hayakawa
article en

Abstract

Abstract The DsTau(NA65) experiment at CERN was proposed to measure an inclusive differential cross-section of $$D_s$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>D</mml:mi> <mml:mi>s</mml:mi> </mml:msub> </mml:math> production with decay to tau lepton and tau neutrino in p – A interactions. The DsTau detector is based on the nuclear emulsion technique, which provides excellent spatial resolution for detecting short-lived particles like charmed hadrons. This paper presents the first results of the analysis of the pilot-run (2018 run) data and reports the accuracy of the proton interaction vertex reconstruction. High precision in vertex reconstruction enables detailed measurement of proton interactions, even in environments with high track density. The measured data has been compared with several Monte Carlo event generators in terms of multiplicity and angular distribution of charged particles. The multiplicity distribution obtained in p–W interactions is tested for KNO-G scaling and is found to be nearly consistent. The interaction length of protons in tungsten is measured to be $$93.7 \pm 2.6~\text {mm}.$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>93.7</mml:mn> <mml:mo>±</mml:mo> <mml:mn>2.6</mml:mn> <mml:mspace/> <mml:mtext>mm</mml:mtext> <mml:mo>.</mml:mo> </mml:mrow> </mml:math> The results presented in this study can be used to validate event generators of p – A interactions.

The European Physical Journal CVol. 85(3)
University of Bern (CH), Kyushu University (JP), Chiba University (JP), Middle East Technical University (TR), Deutsches Elektronen-Synchrotron DESY (DE), ETH Zurich (CH), Aichi University of Education (JP), National Institute for Laser Plasma and Radiation Physics (RO), RIKEN (JP), Institut National de Physique Nucléaire et de Physique des Particules (FR), Institute of High Energy Physics (CN), Institute of Space Science - INFLPR Subsidiary (RO), RIKEN Nishina Center (JP), Nagoya University (JP), Kobe University (JP), European Organization for Nuclear Research (CH)
CERN, Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu, Japan Society for the Promotion of Science
Openalex Percentile: Top 97%
Particle physics theoretical and experimental studies
DOIOpen Access PDFOpenAlex
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