Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector
Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This paper presents a measurement of the angular distribution of charge...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2 December 2019
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| In: |
Physical review
Year: 2019, Jahrgang: 100, Heft: 6 |
| ISSN: | 2469-9993 |
| DOI: | 10.1103/PhysRevC.100.064901 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1103/PhysRevC.100.064901 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.100.064901 
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| Verfasserangaben: | G. Aad, et al. (ATLAS Collaboration) |
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| 245 | 1 | 0 | |a Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector |c G. Aad, et al. (ATLAS Collaboration) |
| 246 | 3 | 0 | |a sqrt |
| 246 | 3 | 3 | |a Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at square root sNN=5.02 TeV with the ATLAS detector |
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| 500 | |a ATLAS Collaboration: G. Aad, V. Andrei, C.F. Anders, C. Antel, A.E. Bolz, M. Dunford, D.E. Ferreira de Lima, S. Francino, M.P. Geisler, L, Helary, J. Jongmanns, M. Klassen, A. Krishnan, A. Kugel, H. Meyer zu Theenhausen, F. Napolitano, P. Ott, M. Sahinsoy, H.-C. Schultz-Coulon, T. Spieker, R. Stamen, P. Starovoitov, S. Suchek, L. Vigani, S. Weber, M. Wessels, X. Yue [und 2927 weitere] | ||
| 500 | |a Gesehen am 29.01.2020 | ||
| 500 | |a Im Titel ist NN unter s tiefgestellt, ganzer Ausdruck "s NN" steht unter dem Wurzelsymbol | ||
| 520 | |a Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This paper presents a measurement of the angular distribution of charged particles around the jet axis in √sNN=5.02 TeV Pb+Pb and pp collisions, using the ATLAS detector at the LHC. The Pb+Pb and pp data sets have integrated luminosities of 0.49nb−1 and 25pb−1, respectively. The measurement is performed for jets reconstructed with the anti-kt algorithm with radius parameter R=0.4 and is extended to an angular distance of r=0.8 from the jet axis. Results are presented as a function of Pb+Pb collision centrality and distance from the jet axis for charged particles with transverse momenta in the 1- to 63-GeV range, matched to jets with transverse momenta in the 126- to 316-GeV range and an absolute value of jet rapidity of less than 1.7. Modifications to the measured distributions are quantified by taking a ratio to the measurements in pp collisions. Yields of charged particles with transverse momenta below 4 GeV are observed to be increasingly enhanced as a function of angular distance from the jet axis, reaching a maximum at r=0.6. Charged particles with transverse momenta above 4 GeV have an enhanced yield in Pb+Pb collisions in the jet core for angular distances up to r=0.05 from the jet axis, with a suppression at larger distances. | ||
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