Multiplicity distributions in different pseudorapidity intervals at a CMS energy of 540 GeV

Alner, G. J.; Alpgård, K.; Anderer, P.; Ansorge, R. E.; Åsman, B.; Böckmann, K.; Booth, C. N.; Burow, L.; Carlson, P.; Chevalley, J.L.; Clercq, C. De; DeWolf, R. S.; Eckart, B.; Ekspong, G.; Evangelou, I.; Eyring, A.; Fabre, J.; French, K. A.; Fröbel, L.; Gauden, J.; Geich-Gimbel, Ch.; Gijsen, M.; Holt, K.; Hospes, R.; Johnson, D.P.; Jon‐And, K.; Kokott, T. P.; Langer, M.; Meinke, R.; Müller, Th.; Munday, D. J.; Ovens, J. E. V.; Rushbrooke, J. G.; Schmickler, H.; Triantis, F. A.; Hamme, L. Van; Walck, C.; Ward, C. P.; Ward, D. R.; White, T. O.; Wilquet, G.; Yamdagni, N.

doi:10.1016/0370-2693(85)91491-1

Cited by 250 publications

(65 citation statements)

References 44 publications

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“…The Negative-Binomial Distribution (NBD) [18] describes multiplicity distributions in full phase space up to 540 GeV; however, this description is not successful at 900 GeV [19]. NBD describes the distributions up to 1.8 TeV in limited η-intervals (|η| < 0.5) [20].…”

Section: Introductionmentioning

confidence: 99%

Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

et al. 2010

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Charged-particle production was studied in proton-proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range |η| < 1.4. In the central region (|η| < 0.5), at 0.9 TeV, we measure charged-particle pseudo- for non-single-diffractive collisions. The relative increase in charged-particle multiplicity from the lower to higher energy is 24.7% ± 0.5%(stat.) +5.7 −2.8 %(syst.) for inelastic and 23.7% ± 0.5%(stat.) +4.6 −1.1 %(syst.) for non-single-diffractive interactions. This increase is consistent with that reported by the CMS collaboration for non-single-diffractive events and larger than that found by a number of commonly used models. The multiplicity distribution was measured in different pseudorapidity intervals and studied in terms of KNO variables at both energies. The results are compared to protonantiproton data and to model predictions.

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Section: Introductionmentioning

confidence: 99%

Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

et al. 2010

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“…Recently ALICE Collaboration [1] has investigated the multiplicity distributions with pseudorapidity cutoffs and compared its data with the data by UA5 Collaboration [2,3], and concluded that the combined data with η c = 0.5 at 0.2, 0.9, and 2.36 TeV are fairly well described by the single NBD (negative binomial distribution) [4,5]. Moreover, ALICE Collaboration has reported that the KNO scaling [6] holds among the combined data with η c = 0.5 at 0.2, 0.9, and 2.36 TeV.…”

Section: Introductionmentioning

confidence: 99%

Analyses of multiplicity distributions and Bose-Einstein correlations at the LHC by means of generalized Glauber-Lachs formula

Mizoguchi¹

2012

Proceedings of the Seventh Workshop on Particle Correlations and Femtoscopy — PoS(WPCF2011)

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Using the negative binomial distribution (NBD) and the generalized Glauber-Lachs (GGL) formula, we analyze the data on charged multiplicity distributions in the several pseudorapidity intervals |η| < η c at 0.2 -7 TeV by UA5 and ALICE Collaborations. We confirm that the KNO scaling holds among the multiplicity distributions with η c = 0.5 at √ s = 0.2 -2.36 TeV and estimate the energy dependence of a parameter 1/k in NBD and parameters 1/k and γ (the ratio of the average value of the coherent hadrons to that of the chaotic hadrons) in the GGL formula. Using empirical formulae for the parameters 1/k and γ in the GGL formula, we predict the multiplicity distributions with η c = 0.5 at 7 and 14 TeV. Data on the second order Bose-Einstein correlations (BEC) at 0.9 and 2.36 TeV by ALICE and CMS Collaborations are also analyzed based on the GGL formula. Predictions for the third order BEC at 0.9 and 2.36 TeV are presented.

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“…Charged particle multiplicity fluctuations have been measured in elementary collisions over a large range of collisions energies [14,15,16,17,18,19,20] [25]. The PHENIX Experiment at RHIC has performed an analysis of density correlations in longitudinal space with a differential analysis of charged particle multiplicity fluctuations in 200 GeV Au+Au collisions over the entire transverse momentum range [26].…”

Section: Introductionmentioning

confidence: 99%

Charged hadron multiplicity fluctuations inAu+AuandCu+Cucollisions from
Adare¹,
Adler²,
Afanasiev³
et al. 2008
Phys. Rev. C

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A comprehensive survey of event-by-event fluctuations of charged hadron multiplicity in relativistic heavy ions is presented. The survey covers Au+Au collisions at √ sNN = 62.4 and 200GeV, and Cu+Cu collisions at √ sNN = 22.5, 62.4, and 200 GeV. Fluctuations are measured as a function of collision centrality, transverse momentum range, and charge sign. After correcting for non-dynamical fluctuations due to fluctuations in the collision geometry within a centrality bin, the remaining dynamical fluctuations expressed as the variance normalized by the mean tend to decrease with increasing centrality. The dynamical fluctuations are consistent with or below the expectation from a superposition of participant nucleon-nucleon collisions based upon p+p data, indicating that this dataset does not exhibit evidence of critical behavior in terms of the compressibility of the system. A comparison of the data with a model where hadrons are independently emitted from a number of hadron clusters suggests that the mean number of hadrons per cluster is small in heavy ion collisions.

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Multiplicity distributions in different pseudorapidity intervals at a CMS energy of 540 GeV

Cited by 250 publications

References 44 publications

Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

Analyses of multiplicity distributions and Bose-Einstein correlations at the LHC by means of generalized Glauber-Lachs formula

Charged hadron multiplicity fluctuations inAu+AuandCu+Cucollisions from
Adare¹,
Adler²,
Afanasiev³
et al. 2008
Phys. Rev. C

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Multiplicity distributions in different pseudorapidity intervals at a CMS energy of 540 GeV

Cited by 250 publications

References 44 publications

Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

Analyses of multiplicity distributions and Bose-Einstein correlations at the LHC by means of generalized Glauber-Lachs formula

Charged hadron multiplicity fluctuations inAu+AuandCu+Cucollisions fromAdare1, Adler2, Afanasiev3 et al. 2008Phys. Rev. C

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Charged hadron multiplicity fluctuations inAu+AuandCu+Cucollisions from
Adare¹,
Adler²,
Afanasiev³
et al. 2008
Phys. Rev. C