Angular correlations between the charged particles produced in pp collisions at ISR energies

Eggert, K.; Frenzel, H.; Thomé, W.; Betev, B. L.; Darriulat, P.; Dittmann, P.; Holder, M.; McDonald, Kirk T.; Modis, Theodore; Pugh, H.G.; Tittel, K.; Derado, I.; Eckardt, V.; Gebauer, H. J.; Meinke, R.; Sander, O.R.; Seyboth, P.

doi:10.1016/0550-3213(75)90440-x

Cited by 102 publications

(50 citation statements)

References 8 publications

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“…IV) of 2.44±0.08 at √ s = 200 GeV, increasing with collision energy and event multiplicity. The results are consistent with previous measurements from ISR and SppS at various energies [1,3,4].…”

Section: Introductionsupporting

confidence: 82%

“…in Ref. [3]), whereas the broader away-side generally arises from the decay of clusters with lower p T . Fig.…”

Section: Correcting For Limited Acceptancementioning

confidence: 99%

“…The simple idea that hadrons are produced in clusters, rather than individually, has had great success in describing many features of particle production [1][2][3][4]. In this scenario, hadronization proceeds via "clusters", high mass states (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…resonances but not necessarily with all well-defined quantum numbers) which decay isotropically in their rest frame into the final-state hadrons. An independent cluster emission model (ICM) has been widely applied to the study of two-particle correlations [1][2][3][4][5], where clusters are formed before the final-state hadrons and are independently emitted according to a dynamically generated distribution in η and φ. The clusters subsequently decay isotropically in their own rest frame into the observed final-state hadrons.…”

Section: Introductionmentioning

confidence: 99%

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System size dependence of cluster properties from two-particle angular correlations inCu+CuandAu+Aucollisions at<

Alver¹,

Ballintijn²,

Busza³

et al. 2010

Phys. Rev. C

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We present results on two-particle angular correlations in Cu+Cu and Au+Au collisions at a center of mass energy per nucleon pair of 200 GeV over a broad range of pseudorapidity (η) and azimuthal angle (φ) as a function of collision centrality. The PHOBOS detector at RHIC has a uniquelylarge angular coverage for inclusive charged particles, which allows for the study of correlations on both long-and short-range scales. A complex two-dimensional correlation structure in ∆η and ∆φ emerges, which is interpreted in the context of a cluster model. The effective cluster size and decay width are extracted from the two-particle pseudorapidity correlation functions. The effective cluster size found in semi-central Cu+Cu and Au+Au collisions is comparable to that found in proton-proton collisions but a non-trivial decrease of the size with increasing centrality is observed. Moreover, a comparison between results from Cu+Cu and Au+Au collisions shows an interesting scaling of the effective cluster size with the measured fraction of total cross section (which is related to the ratio of the impact parameter to the nuclear radius, b/2R), suggesting a geometric origin. Further analysis for pairs from restricted azimuthal regions shows that the effective cluster size at ∆φ ∼ 180 • drops more rapidly toward central collisions than the size at ∆φ ∼ 0 • . The effect of limited η acceptance on the cluster parameters is also addressed, and a correction is applied to present cluster parameters for full η coverage, leading to much larger effective cluster sizes and widths than previously noted in the literature. These results should provide insight into the hot and dense medium created in heavy ion collisions.PACS numbers: 25.75.Dw,25.75.Gz

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Section: Introductionsupporting

confidence: 82%

“…in Ref. [3]), whereas the broader away-side generally arises from the decay of clusters with lower p T . Fig.…”

Section: Correcting For Limited Acceptancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

System size dependence of cluster properties from two-particle angular correlations inCu+CuandAu+Aucollisions at<

Alver¹,

Ballintijn²,

Busza³

et al. 2010

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…Both short-and long-range correlations have been discovered in the past decades [1,2] which have been given a simple interpretation via the concept of clustering [3,4]. In a cluster model, clusters of hadrons are formed first and emitted independently according to some basic scheme.…”

Section: Introductionmentioning

confidence: 99%

Two-particle angular correlations in pp and CuCu collisions at PHOBOS

Li¹

2007

Proceedings of Correlations and Fluctuations in Relativistic Nuclear Collisions — PoS(CFRNC2006)

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Abstract. We present results on two-particle angular correlations in p+p and Cu+Cu collisions over a broad range of (η,φ). The PHOBOS detector has a uniquely large angular coverage for inclusive charged particles. This allows for the study of correlations on both long and short range pseudorapidity scales. A complex twodimensional correlation structure emerges which is interpreted in the context of a cluster model. The cluster size and its decay width are extracted from the two-particle pseudorapidity correlation function. Relative to p+p collisions, Cu+Cu reactions show a non-trivial decrease of cluster size with increasing centrality. These results may provide insight into the hadronization stage of the hot and dense medium created in heavy ion collisions.

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A Jet Model Study of Correlations in Hadron‐Hadron Reactions Due to Resonance Production

Biebl¹,

Klein²,

Nahnhauer³

1980

Fortschr. Phys.

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Secondary particle correlations are discussed as a basic feature of hadron induced multiparticle reactions in the 5 to 1500 GeV energy range. Two introductory sections are devoted to definitions of cross sections and to empirical regularities of multiple production. Many of these regularities can be understood to be consequences of energy‐momentum conservation and limited transverse momenta (uncorrelated jet model (UJM)). An extension of the UJM is considered, the correlated jet model (CJM), by introducing dynamical short range correlations between the particles which are assumed to be due to resonance production. Many properties of single‐particle distributions and correlation functions can be derived already from kinematics of resonance decay. The CJM is used to investigate in detail the origin of angular correlations (azimuthal, GGLP‐effect) and of correlations between neutral and charged particles (〈π°〉nc, f00(nc)). These correlations are shown to arise almost completely from the production and decay of mainly two‐particle resonances like ∂°, K* and Δ, the main evidence coming from the use of the invariant mass as the basic variable where only resonances or reflections of them give remarkable effects. Compared to the UJM, the CJM is the first approximation of a successive correlations analysis of the production amplitude squared, i.e. having separated the effects of energy‐momentum and quantum number conservation. This might be also interesting in view of the forthcoming accelerator generation.

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Angular correlations between the charged particles produced in pp collisions at ISR energies

Cited by 102 publications

References 8 publications

System size dependence of cluster properties from two-particle angular correlations inCu+CuandAu+Aucollisions at<

System size dependence of cluster properties from two-particle angular correlations inCu+CuandAu+Aucollisions at<

Two-particle angular correlations in pp and CuCu collisions at PHOBOS

A Jet Model Study of Correlations in Hadron‐Hadron Reactions Due to Resonance Production

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