Charged-particle multiplicity measurement in proton-proton collisions at √s=7 TeV with ALICE at LHC
The pseudorapidity density and multiplicity distribution of charged particles produced in proton–proton collisions at the LHC, at a centre-of-mass energy s√=7 TeV, were measured in the central pseudorapidity region |η|<1. Comparisons are made with previous measurements at s√=0.9 TeV and 2.36 TeV....
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| Hauptverfasser: | , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
22 June 2010
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| In: |
The European physical journal. C, Particles and fields
Year: 2010, Jahrgang: 68, Pages: 345-354 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-010-1350-2 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-010-1350-2 |
| Verfasserangaben: | The ALICE Collaboration* |
| Zusammenfassung: | The pseudorapidity density and multiplicity distribution of charged particles produced in proton–proton collisions at the LHC, at a centre-of-mass energy s√=7 TeV, were measured in the central pseudorapidity region |η|<1. Comparisons are made with previous measurements at s√=0.9 TeV and 2.36 TeV. At s√=7 TeV, for events with at least one charged particle in |η|<1, we obtain dNch/dη=6.01±0.01(stat.)+0.20−0.12(syst.). This corresponds to an increase of 57.6%±0.4%(stat.)+3.6−1.8%(syst.) relative to collisions at 0.9 TeV, significantly higher than calculations from commonly used models. The multiplicity distribution at 7 TeV is described fairly well by the negative binomial distribution. |
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| Beschreibung: | *The ALICE Collaboration: K. Aamodt, V. Angelov, O. Busch, P. Glässel, R. Grajcarek, N. Herrmann, J. Klein, J. Mercado Pérez, K. Oyama, Y. Pachmayer, R. Schicker, K. Schweda, H.K. Soltveit, J. Stachel, S. Vallero, B. Windelband (und sehr viele weitere Personen] Im Titel steht der Buchstabe s unter dem Wurzelsymbol Gesehen am 14.11.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-010-1350-2 |