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Hadron distributions: Recent results from the CERN experiment NA44

The NA44 collaboration Xu, Nu ; Bearden, I.G. ; Bøggild, H. ; et al.

Nucl.Phys.A 610 (1996) 175C-187C, 1996.

Inspire Record 432743 DOI 10.17182/hepdata.36469

Proton distributions at midrapidity have been measured for 158A·GeV Pb+Pb collisions in the focusing spectrometer experiment NA44 at CERN. A high degree of nuclear stopping is found in the truly heavy ion collisions. Systematic results of single particle transverse momentum distributions of pions, kaons, and protons, of 200A·GeV S+S and 158A·GeV Pb+Pb central collisions will be addressed within the context of thermalization. By comparing these data with thermal and transport models, freeze-out parameters such as the temperature parameter T fo and mean collective flow velocity 〈β〉 are extracted. Preliminary results of the particle ratios of K − K + and p p are discussed in the context of cascade models of RQMD and VENUS.

1 data table

Table 1

CENTRAL COLLISIONS: SIG(TRIG)/SIG(GEOM)=10%.

Production of strange and multistrange hyperons and anti-hyperons in S W interactions at 200-GeV/c per nucleon

The WA85 collaboration Abatzis, S. ; Andrighetto, A. ; Antinori, F. ; et al.

Phys.Lett.B 359 (1995) 382-386, 1995.

Inspire Record 407557 DOI 10.17182/hepdata.34056

Strange and multistrange baryon and antibaryon production is a useful probe into the dynamics of the hot hadronic matter created in central heavy ion interactions. Relative production yields and transverse mass spectra are presented for Λ, Λ , Ξ − and Ξ + hyperons produced in central sulphur-tungsten interactions at 200 GeV/ c per nucleon.

4 data tables

Table 1

Distributions are fitted with (1/MT**1.5)*DN/DMT=CONST*EXP(-MT/SLOPE).

Table 2

No description provided.

Table 3

No description provided.

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Recent results from NA44 and a review of HBT

The NA44 collaboration Jacak, B.V. ; Boggild, H. ; Boissevain, J. ; et al.

Nucl.Phys.A 590 (1995) 215C-232C, 1995.

Inspire Record 407654 DOI 10.17182/hepdata.36517

None

1 data table

Table 1

PRELIMINARY DATA FOR CENTRAL EVENTS.

Charged hadron distributions in p A and A-A collisions at the CERN SPS

The NA44 collaboration Dodd, Jeremy ; Bøggild, H. ; Boissevain, J. ; et al.

Nucl.Phys.A 590 (1995) 523C-526C, 1995.

Inspire Record 407678 DOI 10.17182/hepdata.36504

Single particle distributions of π ± , K ± , p , p and d near mid-rapidity from 450 GeV/c p A and 200 GeV/c per nucleon SA collisions are presented. Inverse slope parameters are extracted from the transverse mass spectra, and examined for indications of collective phenomena. Proton and antiproton yields are determined for different projectile-target combinations. First results from 160 GeV/c per nucleon PbPb collisions are presented.

2 data tables

Table 1

No description provided.

Table 2

PRELIMINARY DATA FOR CENTRAL EVENTS.

Hadron production in S + Ag and S + Au collisions at 200-GeV/nucleon

The NA35 collaboration Röhrich, Dieter ; Alber, T. ; Bächler, J. ; et al.

Nucl.Phys.A 566 (1994) 35C-44C, 1994.

Inspire Record 378631 DOI 10.17182/hepdata.36563

None

3 data tables

Table 1

No description provided.

Table 2

NET BARYON DENSITY D(N)/D(Y) HAS BEEN DETERMINED AT THE RAPIDITY OF NN C.M.S., FOR NET BARYON THE FORMULAR: 2*(P-PBAR)+1.6*(LAMBDA- LAMBDABAR) HAS BEEN USED.

Table 3

No description provided.

Production of charged kaons in proton - nucleus and nucleus-nucleus collisions at 200-GeV/Nucleon

The NA35 collaboration Baechler, J. ; Bartke, J. ; Białkowska, H. ; et al.

Z.Phys.C 58 (1993) 367-374, 1993.

Inspire Record 342660 DOI 10.17182/hepdata.14428

Production of charged kaons in proton-sulphur, proton-gold, sulphur-sulphur and oxygen-gold collisions at 200 GeV/nucleon has been studied in the NA35 Streamer Chamber experiment. Rapidity and transverse mass distributions as well as mean multiplicities were obtained. The results are compared with nucleon-nucleon data and with model predictions.

22 data tables

Table 1

Tranverse mass distribution for all charged kaons in S S collisions for the limited yrap range 1.4 to 2.4.

Table 2

Tranverse mass distribution for K0S production in the limited rapidity range 1.4 to 2.4. Data are taken from Bartke et al. ZP C48 (1990) 191.

Table 3

Rapidity distribution for K+ production in p SU interactions.

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Production of charged kaons in central S + S and O + Au collisions at 200-GeV/nucleon

The NA35 collaboration Kowalski, M. ; Bachler, J. ; Bartke, J. ; et al.

Nucl.Phys.A 544 (1992) 609C-614C, 1992.

Inspire Record 343256 DOI 10.17182/hepdata.36667

Product of charged kaons in central S + S and O + Au collisions at 200 GeV/nucleon has been studied in the NA 35 Streamer Chamber experiment. Mean multiplicities and transverse mass distributions were obtained. They were compared with nucleon-nucleon data and with model predictions.

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Strange particle production in sulphur - tungsten interactions at 200-GeV/c per nucleon

The WA85 collaboration Kinson, J.B. ; Abatzis, S. ; Antinori, F. ; et al.

Nucl.Phys.A 544 (1992) 321-334, 1992.

Inspire Record 321220 DOI 10.17182/hepdata.36664

Multi-strange baryon and anti-baryon production is expected to be a useful probe in the search for Quark-Gluon Plasma formation. We present the transverse mass distributions of negative particles, K o s, Λs, Λ s, and Ξ − s produced in sulphurtungsten interactions at 200 GeV/c per nucleon and give the corrected ratios Λ Λ, Ξ − Λ and Ξ − /Λ . We note that our ratio Ξ − / Λ appears large in comparison to that from p p interactions.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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