Näytä suppeat kuvailutiedot

dc.contributor.authorALICE Collaboration
dc.date.accessioned2016-07-12T06:17:24Z
dc.date.available2016-07-12T06:17:24Z
dc.date.issued2016
dc.identifier.citationALICE Collaboration. (2016). Particle identification in ALICE: a Bayesian approach. <i>European Physical Journal Plus</i>, <i>131</i>(5), Article 168. <a href="https://doi.org/10.1140/epjp/i2016-16168-5" target="_blank">https://doi.org/10.1140/epjp/i2016-16168-5</a>
dc.identifier.otherCONVID_26111614
dc.identifier.otherTUTKAID_70625
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/50785
dc.description.abstractWe 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 K0 S → 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 effi- ciency. 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.
dc.language.isoeng
dc.publisherSpringer Berlin Heidelberg
dc.relation.ispartofseriesEuropean Physical Journal Plus
dc.subject.otherALICE experiment
dc.subject.otherparticle identification
dc.subject.otherBayesian approach
dc.titleParticle identification in ALICE: a Bayesian approach
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201607113570
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-07-11T15:15:03Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn2190-5444
dc.relation.numberinseries5
dc.relation.volume131
dc.type.versionpublishedVersion
dc.rights.copyright© CERN for the benefit of the ALICE Collaboration 2016. This article is published with open access at Springerlink.com and distributed under the terms of a the Creative Commons Attribution 4.0 License.
dc.rights.accesslevelopenAccessfi
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1140/epjp/i2016-16168-5


Aineistoon kuuluvat tiedostot

Thumbnail

Aineisto kuuluu seuraaviin kokoelmiin

Näytä suppeat kuvailutiedot

© CERN for the benefit of the ALICE Collaboration 2016. This article is published with open access at Springerlink.com and distributed under the terms of a the Creative Commons Attribution 4.0 License.
Ellei muuten mainita, aineiston lisenssi on © CERN for the benefit of the ALICE Collaboration 2016. This article is published with open access at Springerlink.com and distributed under the terms of a the Creative Commons Attribution 4.0 License.