Charged particle correlations in $$\bar pp$$ collisions at c.m. energies of 200, 546 and 900 GeV

Ansorge, R. E.; Åsman, B.; Booth, C. N.; Burow, L.; Carlson, P.; DeWolf, R. S.; Eckart, B.; Ekspong, G.; Fuglesang, C.; Gaudaen, J.; Geich-Gimbel, Ch.; Holl, B.; Hospes, R.; Jon‐And, K.; Johnson, Denis; Lotse, F.; Manthos, N.; Munday, D. J.; Ovens, J. E. V.; Pelzer, W.; Rushbrooke, J. G.; Schmickler, H.; 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/bf01579906

Cited by 101 publications

(48 citation statements)

References 37 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: 93%

“…In p+p collisions, inclusive two-particle correlations have been found to have two components: "intrinsic" twoparticle correlations as well as an effective "long-range" correlation due to event-by-event fluctuations of the overall particle multiplicity (see, for example, Ref. [1]). By considering the two-particle rapidity density at fixed multiplicity, the intrinsic correlations between particles were isolated and found to be approximately Gaussian, with a range of σ η ∼ 1 unit in pseudorapidity (η = − ln(tan(θ/2))).…”

Section: Introductionmentioning

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: 93%

Section: Introductionmentioning

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

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“…The correlation functions themselves show rich structure and energy dependence. Of particular importance are the strong long-range rapidity correlations which emerge at collider energies [96], but are largely absent at fixedtarget energies. In all models of multiparticle production, soft or hard, it is anticipated that these correlations will on average further strengthen at the LHC energy scale.…”

Section: Generic Collisionsmentioning

confidence: 99%

A full-acceptance detector at the LHC (FELIX)

Ageev¹,

Akhobadze²,

Alvero³

et al. 2002

J. Phys. G: Nucl. Part. Phys.

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The FELIX collaboration had proposed the construction of a full-acceptance detector for the LHC. The primary mission of FELIX was the study of QCD: to provide comprehensive and definitive observations of a very broad range of strong-interaction processes. This document contains an extensive discussion of this physics menu. In a further paper the FELIX detector will be reviewed. Contents HISTORYWith the advent of the large hadron collider (LHC), we are on the threshold of a new era in high-energy physics. With instrumentation in the form of dedicated experiments of unprecedented precision and complexity, the LHC will move significantly beyond the current high-energy frontier, and dramatically improve our understanding of particle physics at the highest energies and shortest distances accessible to man.As currently planned, however, the LHC experimental programme is incomplete. Moreover, these deficiencies continue and extend what has been a gap in the experimental programme of all hadron colliders. The problem lies in the design of the detectors instrumenting hadron colliders: they are all optimized for rare, high-pt events. These 'general purpose' detectors are anything but that. Rather, they are designed to explore extreme shortdistance phenomena. Without intending to demean the efforts of the collaborations which have built or are building these detectors, it is nevertheless these events in which the theorists are most confident that they understand the physics, and are in many ways experimentally most accessible.While there is no doubt that such physics and such detectors should be the centrepiece of any programme of hadron collider physics, it seems much less clear that they should be the only item on the agenda. Indeed, it can be argued that a full-acceptance detector, capable of detecting and measuring each particle in an event well, may have the greatest discovery potential. Alas, the absence of any experimental effort in this direction in the collider era has meant that both theoretical investigations and experimental design of such detectors has languished, to the point that many in the community have come to think of high-pt physics as the last frontier in particle physics.The FELIX collaboration sought to rectify this situation. With support from the CERN administration, some 160 physicists collaborated in preparing the FELIX LoI. Many of these could not officially join the collaboration, and so their help could only be acknowledged. While the FELIX proposal was never officially killed, it was nevertheless effectively killed without the collaboration making a formal presentation to the LHC committee.All of this, of course, is history, and not very pleasant history at that. The motivation for a full-acceptance detector remains, however, and interest on the part of the broader community, despite the implications of this history, remains high. Because of this, the FELIX collaboration, together with those who helped but were not members, believes that it is important to document the physics of a ...

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