TY - JOUR
T1 - Charged-particle multiplicity measurement in proton-proton collisions at root s=7 TeV with ALICE at LHC
AU - Aamodt...[et al.], K.
AU - Bearden, Ian
AU - Bøggild, Hans
AU - Dalsgaard, Hans Hjersing
AU - Gaardhøje, Jens Jørgen
AU - Nielsen, Børge Svane
PY - 2010/8/1
Y1 - 2010/8/1
N2 - 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 {pipe}η{pipe} < 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 {pipe}η{pipe} < 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.
AB - 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 {pipe}η{pipe} < 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 {pipe}η{pipe} < 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.
U2 - 10.1140/epjc/s10052-010-1350-2
DO - 10.1140/epjc/s10052-010-1350-2
M3 - Journal article
SN - 1434-6044
VL - 68
SP - 345
EP - 354
JO - The European Physical Journal C: Particles and Fields
JF - The European Physical Journal C: Particles and Fields
IS - 3-4
ER -