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Abramowicz, H; Affolder, A A; Agatonovic-Jovin, T; Alonso, A; Amram, N; Ancu, L S; Anderson, K J; Arce, A T H; Ashkenazi, A; Bates, R L; Beacham, J B; Beltramello, O; Blazek, T; Budagov, I A; Büscher, V; Butt, A I; Butti, P; Calandri, A; Capua, M; Cattai, A; Cerutti, F; Dassoulas, J; De Castro, S; Del Prete, T; Di Valentino, D; Duckeck, G; Duflot, L; Dyndal, M; Edwards, N C; Eigen, G; Ellert, M; Esposito, B; Fawcett, W J; Fisher, W C; Flaschel, N; Gao, J; Glaysher, P C F; Grout, Z J; Guo, J; Head, S J; Hsu, C; Idrissi, Z; Iuppa, R; Ivarsson, J; Korol, A A; Krieger, P; Kuger, F; Lefebvre, M; Leister, A G; Lester, C G; Li, B; Li, L; Liu, M; Maier, T; Marjanovic, M; Martin, B; Massa, L; Mc Fadden, N C; Minashvili, I A; Miucci, A; Monk, J; Morange, N; Moritz, S; Mueller, T; Ogren, H; Orestano, D; Owen, M; Pandini, C E; Petroff, P; Pettersson, N E; Pires, S; Poettgen, R; Polifka, R; Poulard, G; Purohit, M; Rizatdinova, F; Rodriguez Perez, A; Rubinskiy, I; Saimpert, M; Sánchez, J; Sandstroem, R; Schillo, C; Schreyer, M; Sekhniaidze, G; Sidorov, D; Sioli, M; Skubic, P; Soloshenko, A; Soualah, R; South, D; Suzuki, S; Tackmann, K; Taylor, P T E; Taylor, W; Thompson, E N; Venturi, N; Vickey, T; Willis, C; Willocq, S; Yang, H
The European physical journal. C, Particles and fields, 2016, Volume: 76, Issue: 6Journal Article
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 fbFormula: see text of data recorded with the ATLAS detector in 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.
