Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at √sNN=8.16 TeV
The pseudorapidity density of charged particles, dNch/dη, in p–Pb collisions has been measured at a centre-of-mass energy per nucleon–nucleon pair of √sNN=8.16 TeV at mid-pseudorapidity for non-single-diffractive events. The results cover 3.6 units of pseudorapidity, |η|<1.8. The dNch/dη value is...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
4 April 2019
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| In: |
The European physical journal. C, Particles and fields
Year: 2019, Volume: 79, Issue: 4 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-019-6801-9 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1140/epjc/s10052-019-6801-9
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| Author Notes: | ALICE Collaboration |
MARC
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| 245 | 1 | 0 | |a Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at √sNN=8.16 TeV |c ALICE Collaboration |
| 246 | 3 | 0 | |a sqrt |
| 246 | 3 | 3 | |a Charged-particle pseudorapidity density at mid-rapidity in p-Pb collisions at square root s NN = 8.16 TeV |
| 264 | 1 | |c 4 April 2019 | |
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| 500 | |a ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, M.C. Danisch, A. Deisting, V.J.G. Feuillard, P. Glässel, J. Kim, M. Kim, S. Klewin, M.K. Köhler, L. Leardini, A. Ohlson, Y. Pachmayer, K. Reygers, R. Schicker, M.O. Schmidt, J. Stachel, D.F. Weiser, B. Windelband [und weitere] | ||
| 520 | |a The pseudorapidity density of charged particles, dNch/dη, in p–Pb collisions has been measured at a centre-of-mass energy per nucleon–nucleon pair of √sNN=8.16 TeV at mid-pseudorapidity for non-single-diffractive events. The results cover 3.6 units of pseudorapidity, |η|<1.8. The dNch/dη value is 19.1±0.719.1±0.719.1\pm 0.7 at |η|<0.5. This quantity divided by ⟨Npart⟩ / 2 is 4.73±0.204.73±0.204.73\pm 0.20, where ⟨Npart⟩ is the average number of participating nucleons, is 9.5% higher than the corresponding value for p–Pb collisions at √sNN=5.02 TeV. Measurements are compared with models based on different mechanisms for particle production. All models agree within uncertainties with data in the Pb-going side, while HIJING overestimates, showing a symmetric behaviour, and EPOS underestimates the p-going side of the dNch/dη distribution. Saturation-based models reproduce the distributions well for η>−1.3. The dNch/dη is also measured for different centrality estimators, based both on the charged-particle multiplicity and on the energy deposited in the Zero-Degree Calorimeters. A study of the implications of the large multiplicity fluctuations due to the small number of participants for systems like p–Pb in the centrality calculation for multiplicity-based estimators is discussed, demonstrating the advantages of determining the centrality with energy deposited near beam rapidity. | ||
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