Performance evaluation of the aerogel RICH counter for the Belle II spectrometer using early beam collision data
| Autor: | G. Nazaryan, P. Križan, Y. Lai, Hidekazu Kakuno, H. Kitamura, S. Nishida, R. Pestotnik, H. Kawai, Tomoyuki Konno, Makoto Tabata, M. Nishimura, T. Kumita, L. Burmistrov, F. Le Diberder, K. Ogawa, H. Kindo, Takeo Kawasaki, Samo Korpar, Takashi Kohriki, Y. Yusa, Masayoshi Shoji, S. Kakimoto, A. Seljak, L. Santelj, Shuichi Iwata, K. Kuze, S. Ogawa, M. Mrvar, Masakazu Kobayashi, M. Yonenaga, S. Tamechika, G. Karyan, Iki Adachi, T. Sumiyoshi, Toru Iijima |
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| Přispěvatelé: | Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Photon
Physics - Instrumentation and Detectors measurement methods aerogel General Physics and Astronomy FOS: Physical sciences BELLE 01 natural sciences Particle identification 030218 nuclear medicine & medical imaging High Energy Physics - Experiment Nuclear physics K: particle identification 03 medical and health sciences High Energy Physics - Experiment (hep-ex) 0302 clinical medicine Pion 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] H14 Particle identification [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] Nuclear Experiment RICH Cherenkov radiation Physics Spectrometer 010308 nuclear & particles physics Detector Instrumentation and Detectors (physics.ins-det) detector: alignment calibration efficiency High Energy Physics::Experiment pi: particle identification Event (particle physics) Beam (structure) performance |
| Zdroj: | PTEP PTEP, 2020, 2020 (9), pp.093H01. ⟨10.1093/ptep/ptaa090⟩ |
| DOI: | 10.1093/ptep/ptaa090⟩ |
| Popis: | The Aerogel Ring Imaging Cherenkov (ARICH) counter serves as a particle identification device in the forward end-cap region of the Belle II spectrometer. It is capable of identifying pions and kaons with momenta up to $4 \, {\rm GeV}/c$ by detecting Cherenkov photons emitted in the silica aerogel radiator. After the detector alignment and calibration of the probability density function, we evaluate the performance of the ARICH counter using early beam collision data. Event samples of $D^{\ast +} \to D^0 \pi^+ (D^0 \to K^-\pi^+)$ were used to determine the $\pi(K)$ efficiency and the $K(\pi)$ misidentification probability. We found that the ARICH counter is capable of separating kaons from pions with an identification efficiency of $93.5 \pm 0.6 \, \%$ at a pion misidentification probability of $10.9 \pm 0.9 \, \%$. This paper describes the identification method of the counter and the evaluation of the performance during its early operation. Comment: To be published in Prog. Theor. Exp. Phys |
| Databáze: | OpenAIRE |
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