Coalescence and flow in ultrarelativistic heavy ion collisions

Scheibl, Rudiger; Heinz, Ulrich

doi:10.1103/physrevc.59.1585

Cited by 277 publications

(403 citation statements)

References 66 publications

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“…In 1998 a significant increase of the statistics was achieved compared to data from 1994 and 1995 published in [10]. We found a total of two 3 He at a rigidity of −20 GeV/c and three at −40 GeV/c. No antitritont has been observed.…”

Section: Experimental Methodsmentioning

confidence: 53%

“…We assume the same production cross section near centre of mass rapidity (y cm = 2.9) for 3 He (y = 3.4) and fort (y = 2.7) at −20 GeV/c. At the rigidity of −40 GeV/c the larger acceptance for 3 He is counterbalanced by the reduced 3 He production cross section (factor 4) at y = 4.0 as shown in table 2 and in figure 8. Since three 3 He have been identified at a rigidity of −40 GeV/c, we would also have expected to find a similar number of t. They should have shown up in the mass to charge spectrum of figure 5 obtained from the TOF information.…”

Section: Experimental Methodsmentioning

confidence: 92%

“…At the rigidity of −40 GeV/c the larger acceptance for 3 He is counterbalanced by the reduced 3 He production cross section (factor 4) at y = 4.0 as shown in table 2 and in figure 8. Since three 3 He have been identified at a rigidity of −40 GeV/c, we would also have expected to find a similar number of t. They should have shown up in the mass to charge spectrum of figure 5 obtained from the TOF information. The invariant differential production cross section for particles with energy E and momentum p is evaluated from Ed 3 σ dp 3 …”

Section: Experimental Methodsmentioning

confidence: 92%

“…In the multiwire proportional chambers and in the TOF hodoscopes no multiple entries were recorded excluding the presence of more than one particle in the beamline. Table 1 shows a summary of the data taking for the 3 He search. In 1998 a significant increase of the statistics was achieved compared to data from 1994 and 1995 published in [10].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…In the meantime more data have been collected at two rapidities y = 3.4 and 4.0 (see table 1). In this paper we present data on the 3 He production at nearly zero transverse momentum (p t ∼ 0) using the full statistics of O (10 12 ) lead-lead (Pb-Pb) collisions in our experiment. The data were taken with a minimum bias trigger.…”

Section: Introductionmentioning

confidence: 99%

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Antihelium-3 production in lead-lead collisions at 158AGeV/c

et al. 2003

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Abstract. The NA52 experiment measured particle and antiparticle yields at 0 • production angle over a wide range in rapidity in lead-lead (Pb-Pb) collisions at 158 A GeV/c with a minimum bias trigger. Besides O(10 6 ) antiprotons (p) and O(10 3 ) antideuterons (d) a total of five antihelium-3 ( 3 He) were found. The resulting invariant differential 3 He production cross sections at p t 0 GeV/c turn out to be E d 3 σ dp 3 = (2.5 ± 1.8) × 10 −7 bc 3 GeV −2 at a rapidity of y = 3.4 in the laboratory system and (5.9 ± 3.4) × 10 −8 bc 3 GeV −2 at y = 4.0. The results are discussed in the framework of a simple coalescence model.

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Section: Experimental Methodsmentioning

confidence: 53%