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Particle identification in ALICE: a Bayesian approach
http://hdl.handle.net/2241/00154116
http://hdl.handle.net/2241/0015411612941c8e-f852-42da-abb6-b2defe16c3be
名前 / ファイル | ライセンス | アクション |
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EPJP_131-5 (1.4 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2019-01-18 | |||||
タイトル | ||||||
タイトル | Particle identification in ALICE: a Bayesian approach | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
ブッシュ, オリバー
× ブッシュ, オリバー× 中條, 達也× 江角, 晋一× 三明, 康郎× ALICE Collaboration× Busch, Oliver |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We present a Bayesian approach to particle identification (PID) within the ALICE experiment. The aim is to more effectively combine the particle identification capabilities of its various detectors. After a brief explanation of the adopted methodology and formalism, the performance of the Bayesian PID approach for charged pions, kaons and protons in the central barrel of ALICE is studied. PID is performed via measurements of specific energy loss ( dE/dx) and time of flight. PID efficiencies and misidentification probabilities are extracted and compared with Monte Carlo simulations using high-purity samples of identified particles in the decay channels K0S→π−π+, ϕ→K−K+, and Λ→pπ− in p-Pb collisions at sNN−−−−√=5.02 TeV. In order to thoroughly assess the validity of the Bayesian approach, this methodology was used to obtain corrected pT spectra of pions, kaons, protons, and D0 mesons in pp collisions at s√=7 TeV. In all cases, the results using Bayesian PID were found to be consistent with previous measurements performed by ALICE using a standard PID approach. For the measurement of D0→K−π+, it was found that a Bayesian PID approach gave a higher signal-to-background ratio and a similar or larger statistical significance when compared with standard PID selections, despite a reduced identification efficiency. Finally, we present an exploratory study of the measurement of Λ+c→pK−π+ in pp collisions at s√=7 TeV, using the Bayesian approach for the identification of its decay products. | |||||
書誌情報 |
The European Physical Journal Plus 巻 131, 号 5, p. 168, 発行日 2016-05 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2190-5444 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1140/epjp/i2016-16168-5 | |||||
権利 | ||||||
権利情報 | © CERN for the benefit of the ALICE Collaboration 2016. This article is published with open access at Springerlink.com | |||||
権利 | ||||||
権利情報 | This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | Springer |