Charged-particle multiplicity measurement in proton-proton collisions at root s=7 TeV with ALICE at LHC

Aamodt, K.; Abel, N.; Abeysekara, U.; Abrahantes Quintana, A.; Abramyan, A.; Adamová, Dagmar; Bielčík, Jaroslav; Bielčíková, Jana; Kapitán, Jan; Kushpil, Svetlana; Kushpil, Vasilij; Pachr, M.; Petráček, Vojtěch; Rak, Jan; Šumbera, Michal; Tlustý, David; Wagner, Vladimír; Mareš, Jiří A.; Polák, Karel; Závada, Petr

doi:https://dx.doi.org/10.1140/epjc/s10052-010-1350-2

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Charged-particle multiplicity measurement in proton-proton collisions at root s=7 TeV with ALICE at LHC

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SYSNO ASEP	0357527
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Charged-particle multiplicity measurement in proton-proton collisions at root s=7 TeV with ALICE at LHC
Author(s)	Aamodt, K. (NO) Abel, N. (DE) Abeysekara, U. (US) Abrahantes Quintana, A. (RO) Abramyan, A. (AM) Adamová, Dagmar (UJF-V)_{RID, ORCID, SAI} Bielčík, Jaroslav (UJF-V) Bielčíková, Jana (UJF-V)_{RID, ORCID, SAI} Kapitán, Jan (UJF-V) Kushpil, Svetlana (UJF-V)_{RID, ORCID, SAI} Kushpil, Vasilij (UJF-V)_{ORCID, SAI} Pachr, M. (CZ) Petráček, Vojtěch (UJF-V) Rak, Jan (UJF-V) Šumbera, Michal (UJF-V)_{RID, ORCID, SAI} Tlustý, David (UJF-V) Wagner, Vladimír (UJF-V)_{RID, ORCID, SAI} Mareš, Jiří A. (FZU-D)_{RID, ORCID} Polák, Karel (FZU-D) Závada, Petr (FZU-D)_{RID, ORCID}
Number of authors	1062
Source Title	European Physical Journal C. - : Springer - ISSN 1434-6044 Roč. 68, 3-4 (2010), s. 345-354
Number of pages	10 s.
Language	eng - English
Country	DE - Germany
Keywords	PSEUDORAPIDITY DISTRIBUTIONS ; PP INTERACTIONS ; ENERGIES
Subject RIV	BG - Nuclear, Atomic and Molecular Physics, Colliders
R&D Projects	LA08015 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z10480505 - UJF-V (2005-2011)
	AV0Z10100502 - FZU-D (2005-2011)
UT WOS	000280642600001
DOI	10.1140/epjc/s10052-010-1350-2
Annotation	The pseudorapidity density and multiplicity distribution of charged particles produced in proton-proton collisions at the LHC, at a centre-of-mass energy root s = 7 TeV, were measured in the central pseudorapidity region vertical bar eta vertical bar < 1. Comparisons are made with previous measurements at root s = 0.9 TeV and 2.36 TeV. At root s = 7 TeV, for events with at least one charged particle in \|eta vertical bar\| < 1, we obtain dN(ch)/d eta = 6.01 +/- 0.01(stat.)(-0.12)(+0.20) (syst.). This corresponds to an increase of 57.6%+/-0.4%(stat.)(-1.8%)(+3.6) (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.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2011

Number of the records: 1