Charged hadron distributions in central and peripheral Si+Acollisions at 14.6AGeV/c

Abbott, T.; Akiba, Y.; Beavis, D.; Bloomer, M. A.; Bond, Peter; Chasman, C.; Chen, Z.; Chu, Y. Y.; Cole, B.; Costales, J. B.; Crawford, H. J.; Cumming, J. B.; Debbe, R.; Engelage, J.; Fung, S. Y.; Gonin, M.; Gushue, S.; Hamagaki, H.; Hansén, O.; Hayano, R.; Hayashi, Shûichi; Homma, S.; Huang, H. Z.; Ikeda, Yuichi; Juricic, I.; Kang, Joon Ho; Katcoff, S.; Kaufman, S.; Kimura, Kento; Kitamura, Kazuhiro; Kurita, K.; Ledoux, R. J.; LeVine, M. J.; Miake, Y.; Morse, R. J.; Moskowitz, B.; Nagamiya, S.; Olness, J.W.; Parsons, C. G.; Remsberg, L. P.; Sakuraï, H.; Sarabura, M.; Stankus, P. W.; Steadman, S. G.; Stephans, G. S. F.; Sugitate, T.; Tannenbaum, M. J.; Tanaka, Y. K.; Dijk, J. H. van; Videbæk, F.; Vient, M.; Vincent, P.; Vutsadakis, V.; Wegner, H. E.; Woodruff, D. S.; Wu, Y.; Zajc, W. A.

doi:10.1103/physrevc.50.1024

Cited by 85 publications

(71 citation statements)

References 27 publications

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“…In most studies η f was (like R) set constant such that η t (r) was a function of r only. This cannot reproduce the observed rapidity dependence of p ⊥ and of the inverse slopes of the m ⊥ -spectra [65,66]. In [63,64] it was shown that an η-dependence of R, with R(η) shrinking in the backward and forward rapidity regions keeping the slope η f /R in (43) fixed, is sufficient to fully repair this deficiency.…”

Section: Collective Expansion and K-dependence Of The Correlatormentioning

confidence: 99%

See 1 more Smart Citation

TWO-PARTICLECORRELATIONS INRELATIVISTICHEAVY-IONCOLLISIONS

Heinz

Jacak

1999

Annu. Rev. Nucl. Part. Sci.

234

250

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ABSTRACT:Two-particle momentum correlations between pairs of identical particles produced in relativistic heavy-ion reactions can be analyzed to extract the space-time structure of the collision fireball. We review recent progress in the application of this method, based on newly developed theoretical tools and new high-quality data from heavy-ion collision experiments. Implications for our understanding of the collision dynamics and for the search for the quark-gluon plasma are discussed.

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Section: Collective Expansion and K-dependence Of The Correlatormentioning

confidence: 99%

“…It has been shown that the single-particle m ⊥ -distributions of pions and heavier hadrons reflect a transversely expanding source [65,72,120]. Such spectra are sensitive to a different combination of T and η f [70,72].…”

Section: Combining Single-and Two-particle Spectramentioning

confidence: 99%

TWO-PARTICLECORRELATIONS INRELATIVISTICHEAVY-IONCOLLISIONS

Heinz

Jacak

1999

Annu. Rev. Nucl. Part. Sci.

234

250

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“…3 we plot B 2 for both deuterons (open symbols) and antideuterons (solid symbols), for a variety of other systems and beam energies [3,5,[17][18][19][20][21][22][23][24][25][26], and this paper. The present result for the most central 10% of the cross section is plotted as the larger solid circle and the corrected value as a smaller solid circle.…”

Section: (Received 5 November 1999)mentioning

confidence: 99%

Antideuteron Production in158AGeV/cPb+PbCollisions

Bearden¹,

Bøggild²,

Boissevain³

et al. 2000

Phys. Rev. Lett.

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The invariant cross section as a function of transverse momentum for antideuterons produced in 158A GeV͞c per nucleon Pb 1 Pb central collisions has been measured by the NA44 experiment at CERN. This measurement, together with a measurement of antiprotons, allows for the determination of the antideuteron coalescence parameter. The extracted coalescence radius is found to agree with the deuteron coalescence radius and radii determined from two particle correlations. PACS numbers: 25.75.Dw, 14.20.Dh, 25.40.Ve In central collisions of heavy ions, e.g., Pb 1 Pb, at ultrarelativistic energies, a region of highly compressed and heated nuclear matter is formed. This region subsequently expands both along and transverse to the beam direction until the constituent particles cease to interact at freezeout. In order to be able to derive characteristic energy and matter densities, it is important to determine the spatial extent and the density profile of the expanding source at the time of freeze-out. Such information has so far come primarily from Hanbury-Brown and Twiss (HBT) interferometry, where the extent of the source can be estimated from the dependence of the two particle correlation function on the relative momentum of the two particles (e.g., p 2 p [1,2]). Interpretation of HBT data normally relies on assumptions on the density profile of the emitting source.Independent information on source characteristics can be obtained from a different two body correlation, namely, the formation of deuterons and antideuterons. As a consequence of the small binding energy of the deuteron (2.2 MeV) compared to typical kinetic energies of the particles in the fireball, deuterons can survive only when the probability for collisions within the expanding source is very small, i.e., near freeze-out. At the same time, the formation of the bound two nucleon state requires the presence of a third body to conserve energy and momentum. This introduces a delicate dependence of the formation and survival probability of the (anti)deuteron on the size and density profile of the source.It is of particular interest to study the production of antideuterons and the associated freeze-out volume. Antideuterons are all produced in the collision, and the production rate will thus depend on the production and annihilation probabilities of antiparticles in the medium. Additionally, antideuterons have no contribution from spectator fragments, thus guaranteeing a measurement of the participant source volume. This Letter reports on the first systematic measurement of antiproton and antideuteron yields at nonzero transverse momenta from 158A GeV͞c Pb 1 Pb central collisions at the CERN SPS accelerator. Earlier measurements from Si 1 Au at the AGS and for minimum bias and p t 0 Pb 1 Pb (SPS) are reported in Refs. [3][4][5].In a simple coalescence approach [6,7], composite particles are formed only if the constituent particles are close in phase space at freeze-out. The invariant cross section of the cluster is then expressed as the product of the invaria...

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“…Measurements of deuteron coalescence in high energy heavy ion collisions have been reported previously both at AGS energies [20][21][22][23][24] from 10 to 14.6 A·GeV/c and at SPS energies [25][26][27][28][29] at 200 or 158 A·GeV/c. Of these, the AGS results of Si+A [20] and Au+Au [22] collisions as well as the SPS results of [25] are of special importance for the present study because they also deal with the systematics of deuteron production as function of rapidity, centrality, mass and transverse mass.…”

Section: Introductionmentioning

confidence: 99%

“…Of these, the AGS results of Si+A [20] and Au+Au [22] collisions as well as the SPS results of [25] are of special importance for the present study because they also deal with the systematics of deuteron production as function of rapidity, centrality, mass and transverse mass. The data reported in [26][27][28] are preliminary versions of part of the presently reported results.…”

Section: Introductionmentioning

confidence: 99%

Deuteron and triton production with high energy sulphur and lead beams

Bearden¹,

Bøggild²,

Boissevain

et al. 2002

Eur. Phys. J. C

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Abstract. Proton and deuteron production has been observed in S+S and S+Pb collisions at 200 A·GeV and in Pb+Pb reactions at 158 A·GeV at the CERN SPS accelerator. For Pb+Pb triton production was also measured. The p and d spectra as well as the p and t spectra were observed in similar rapidity ranges and over similar ranges of transverse momenta per nucleon, making it possible to interpret the cross sections of the composite particles in terms of coalescence mechanisms. Volumes of homogeneity were extracted and compared to pion-pair HBT interferometry results. Special attention is given to the dependence on transverse mass, centrality and rapidity.

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Charged hadron distributions in central and peripheral Si+Acollisions at 14.6AGeV/c

Cited by 85 publications

References 27 publications

TWO-PARTICLECORRELATIONS INRELATIVISTICHEAVY-IONCOLLISIONS

TWO-PARTICLECORRELATIONS INRELATIVISTICHEAVY-IONCOLLISIONS

Antideuteron Production in158AGeV/cPb+PbCollisions

Deuteron and triton production with high energy sulphur and lead beams

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