Measurement of the charged-particle multiplicity inside jets from [Formula: see text][Formula: see text] pp collisions with the ATLAS detector

. 2016 ; 76 (6) : 322. [epub] 20160613

Status PubMed-not-MEDLINE Jazyk angličtina Země Francie Médium print-electronic

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid28280438

The number of charged particles inside jets is a widely used discriminant for identifying the quark or gluon nature of the initiating parton and is sensitive to both the perturbative and non-perturbative components of fragmentation. This paper presents a measurement of the average number of charged particles with [Formula: see text] [Formula: see text] inside high-momentum jets in dijet events using 20.3 fb[Formula: see text] of data recorded with the ATLAS detector in pp collisions at [Formula: see text] [Formula: see text] collisions at the LHC. The jets considered have transverse momenta from 50 [Formula: see text] up to and beyond 1.5 [Formula: see text]. The reconstructed charged-particle track multiplicity distribution is unfolded to remove distortions from detector effects and the resulting charged-particle multiplicity is compared to several models. Furthermore, quark and gluon jet fractions are used to extract the average charged-particle multiplicity for quark and gluon jets separately.

2 Physikalisches Institut Georg August Universität Göttingen Germany

2 Physikalisches Institut Justus Liebig Universität Giessen Giessen Germany

Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland

B 1 Stepanov Institute of Physics National Academy of Sciences of Belarus Minsk Republic of Belarus

Budker Institute of Nuclear Physics SB RAS Novosibirsk Russia

Cavendish Laboratory University of Cambridge Cambridge UK

Center for High Energy Physics University of Oregon Eugene OR USA

Centre de Calcul de l'Institut National de Physique Nucléaire et de Physique des Particules Villeurbanne France

Centre National de l'Energie des Sciences Techniques Nucleaires Rabat Morocco

Centro de Física Nuclear da Universidade de Lisboa Lisbon Portugal

Centro de Investigaciones Universidad Antonio Narino Bogota Colombia

CERN Geneva Switzerland

CPPM Aix Marseille Université and CNRS IN2P3 Marseille France

Czech Technical University Prague Praha Czech Republic

D 5 Skobeltsyn Institute of Nuclear Physics M 5 Lomonosov Moscow State University Moscow Russia

Departamento de Física Pontificia Universidad Católica de Chile Santiago Chile

Departamento de Fisica Teorica C 15 Universidad Autonoma de Madrid Madrid Spain

Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain

Departamento de Física Universidad de Buenos Aires Buenos Aires Argentina

Departamento de Física Universidad Técnica Federico Santa María Valparaiso Chile

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Department for Physics and Technology University of Bergen Bergen Norway

Department of Modern Physics University of Science and Technology of China Hefei Anhui China

Department of Particle Physics The Weizmann Institute of Science Rehovot Israel

Department of Physics and Astronomy Iowa State University Ames IA USA

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Department of Physics and Astronomy Tufts University Medford MA USA

Department of Physics and Astronomy University College London London UK

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Department of Physics Yale University New Haven CT USA

Department of Subnuclear Physics Institute of Experimental Physics of the Slovak Academy of Sciences Kosice Slovak Republic

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DESY Hamburg and Zeuthen Germany

Dipartimento di Chimica Fisica e Ambiente Università di Udine Udine Italy

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Dipartimento di Fisica E Fermi Università di Pisa Pisa Italy

Dipartimento di Fisica Sapienza Università di Roma Rome Italy

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E Andronikashvili Institute of Physics Iv Javakhishvili Tbilisi State University Tbilisi Georgia

Electrical Circuits Department Federal University of Juiz de Fora Juiz de Fora Brazil

Enrico Fermi Institute University of Chicago Chicago IL USA

Fachbereich Physik Universität Siegen Siegen Germany

Faculdade de Ciências Universidade de Lisboa Lisbon Portugal

Faculté des Sciences Ain Chock Réseau Universitaire de Physique des Hautes Energies Université Hassan 2 Casablanca Morocco

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Faculté des Sciences Université Mohammed 5 Rabat Morocco

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Faculty of Engineering and Natural Sciences Istanbul Bilgi University Istanbul Turkey

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