Jet and underlying event properties as a function of charged-particle multiplicity in proton-proton collisions at √s = 7 TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105116

Title:	Jet and underlying event properties as a function of charged-particle multiplicity in proton-proton collisions at √s = 7 TeV
Authors:	余欣珊;Chatrchyan, S;Tumasyan, A;Frühwirth, R;Liko, D;Costantini, S;Ocampo Rios, A A;Basegmez, S;Vidal Marono, M;Matos Figueiredo, D;Rodozov, M;Li, Q;Gomez, J P;Tiko, A;Kortelainen, M J;Besancon, M;Collard, C;Brochet, S;Contardo, D;Viret, S;Sammet, J;Pieta, H;Weber, M;Choudhury, S;Horton, D;Salfeld-nebgen, J;Wissing, C;Schröder, M;Butz, E;Held, H;Zsigmond, A J;Ujvari, B;Dhingra, N;Ganguly, S;Guchait, M;Maity, M;Chiorboli, M;Lo Vetere, M;Lucchini, M T;Cavallo, N;Iorio, A O;M;Lacaprara, S;Vanini, S;Broccolo, G;Cossutti, F;Penzo, A;Gyun, D;Kim, M S;Lopez-fernandez, R;Kazana, M;Bunkowski, K;Krolikowski, J;Azarkin, M;Ekmedzic, M;Aguilar-benitez, M;Delgado Peris, A;Martinez Rivero, C;Silva, P;Wöhri, H K;Sala, L;Yu, S S;Shiu, J G;Suwonjandee, N;Hos, I;Barlas, E;Metson, S;Newbold, D M;Lane, R;Virdee, T;Leggat, D;Scarborough, T;Heister, A;Pellett, D;Pilot, J;Yohay, R;Heilman, J;Padhi, S;Pieri, M;Barge, D;Di Giovanni, G P;Gaultney, V;Cavanaugh, R;Strom, D;Newsom, C R;Hu, G;Apyan, A;Zhukova, V;Gude, A;Alverson, G;Nash, D;Pozdnyakov, A;Wolf, M;Smith, G;Neumeister, N;Flanagan, W;Volobouev, I;Greene, S;Arenton, M W;Hirosky, R;Kottachchi Kankanamge Don, C;Sakharov, A
Contributors:	理學院物理學系
Date:	2013-01-01
Issue Date:	2026-04-23 12:07:38 (UTC+8)
Publisher:	Springer New York;Heidelberg: Springer Nature B.V
Abstract:	摘要： (ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image) Characteristics of multi-particle production in proton-proton collisions at ... are studied as a function of the charged-particle multiplicity, N ^sub ch^. The produced particles are separated into two classes: those belonging to jets and those belonging to the underlying event. Charged particles are measured with pseudorapidity \|[eta]\|<2.4 and transverse momentum p ^sub T^>0.25 GeV/c. Jets are reconstructed from charged-particles only and required to have p ^sub T^>5 GeV/c. The distributions of jet p ^sub T^, average p ^sub T^ of charged particles belonging to the underlying event or to jets, jet rates, and jet shapes are presented as functions of N ^sub ch^ and compared to the predictions of the pythia and herwig event generators. Predictions without multi-parton interactions fail completely to describe the N ^sub ch^-dependence observed in the data. For increasing N ^sub ch^, pythia systematically predicts higher jet rates and harder p ^sub T^ spectra than seen in the data, whereas herwig shows the opposite trends. At the highest multiplicity, the data-model agreement is worse for most observables, indicating the need for further tuning and/or new model ingredients. 出版者： Heidelberg: Springer Nature B.V 出版日期： 2013-12-01 出處： The European physical journal. C, Particles and fields, 2013-12, Vol.73 (12), p.1 資源來源： Publicly Available Content Database 版權： Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica 2013 識別號： ISSN: 1434-6044 識別號： EISSN: 1434-6052 識別號： DOI: 10.1140/epjc/s10052-013-2674-5
Appears in Collections:	[Department of Physics] journal & Dissertation

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