Charged particle multiplicity distributions at 200 and 900 GeV c.m. energy

Ansorge, R. E.; Sman, B.; Burow, L.; Carlson, P.; DeWolf, R. S.; Eckart, B.; Ekspong, G.; Evangelou, I.; Fuglesang, C.; Gaudaen, J.; Geich-Gimbel, Ch.; Holl, B.; Jon‐And, K.; Lotse, F.; Manthos, N.; Munday, D. J.; Pelzer, W.; Rushbrooke, J. G.; Triantis, F. A.; Hamme, L. Van; Walck, C.; Ward, C. P.; Ward, D. R.; Webber, C. J. S.; White, T. O.; Wilquet, G.; Yamdagni, N.

doi:10.1007/bf01506531

Cited by 246 publications

(67 citation statements)

References 43 publications

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“…For the three pseudorapidity intervals studied here (|η| < 0.5, 1 and 1.5), C 2 remains constant over the energy range, C 3 shows a small increase with increasing energy for the two largest η intervals, C 4 and C 5 show an increase with increasing energy, which becomes stronger for larger η intervals. These new data are in agreement with UA5 [29], CMS [36] and ALICE's previous results [2,3] in all cases where a comparison was possible (Fig. 20).…”

Section: Quantitative Kno Study With Normalized Q-momentssupporting

confidence: 92%

“…Previous measurements of both dN ch /dη and multiplicity distributions from CMS [35,36] and UA5 [29] allow a direct comparison to our data. Others by ATLAS [37] and LHCb [38] use different definitions (η and p T ranges) making direct comparison impossible.…”

Section: Introductionmentioning

confidence: 55%

“…17). The wavy structure already observed by ALICE in [2,3], for multiplicities above N ch = 25, and previously by UA5 [29], is still hardly significant, and it is not present in the raw data. This feature was also observed in a study of CMS data [79].…”

Section: Multiplicity Distributions Of Primary Charged Particles: Meamentioning

confidence: 65%

“…20 Centre-of-mass energy dependence of the q-moments (q = 2 to 4, left-hand scale, and q = 5, right-hand scale) of the multiplicity distributions for NSD events in three different pseudorapidity intervals (|η| < 1.5 top, |η| < 1.0 middle and |η| < 0.5 bottom). ALICE data (black) are compared to UA5 [29] (red) for |η| < 0.5 and |η| < 1, at √ s = 0.9 TeV, and with CMS [36] (blue) at √ s = 0.9 and 7 TeV for |η| < 0.5. The error bars represent the combined statistical and systematic uncertainties.…”

Section: Discussion Of Results and Conclusionmentioning

confidence: 99%

“…In e + e − collisions, at √ s from 5 to 34 GeV, KNO scaling was found to hold within ±20% [28]. In proton-antiproton collisions at the CERN collider ( √ s = 200, 546 and 900 GeV), KNO scaling was found to be violated for NSD collisions in full phase space [29][30][31]. Nevertheless, for NSD collisions, in limited central pseudorapidity intervals, KNO scaling was still found to hold up to 900 GeV, and at √ s = 546 GeV, KNO scaling was found to hold in the pseudorapidity interval |η| < 3.5 [32,33].…”

Section: Introductionmentioning

confidence: 94%

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Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2017

Eur. Phys. J. C

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A detailed study of pseudorapidity densities and multiplicity distributions of primary charged particles produced in proton-proton collisions, at √ s = 0.9, 2.36, 2.76, 7 and 8 TeV, in the pseudorapidity range |η| < 2, was carried out using the ALICE detector. Measurements were obtained for three event classes: inelastic, non-single diffractive and events with at least one charged particle in the pseudorapidity interval |η| < 1. The use of an improved track-counting algorithm combined with ALICE's measurements of diffractive processes allows a higher precision compared to our previous publications. A KNO scaling study was performed in the pseudorapidity intervals |η| < 0.5, 1.0 and 1.5. The data are compared to other experimental results and to models as implemented in Monte Carlo event generators PHOJET and recent tunes of PYTHIA6, PYTHIA8 and EPOS.

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Section: Quantitative Kno Study With Normalized Q-momentssupporting

confidence: 92%