Serednyakov, S.I.
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A Study of $K^0_S$, $\Lambda$ and $\bar{\Lambda}$ Production in 60-{GeV} and 200-{GeV} Per Nucleon O Au and $p$ Au Collisions With a Streamer Chamber Detector at the {CERN} {SPS}

The NA35 collaboration Bamberger, A. ; Bartke, J. ; Bialkowska, H. ; et al.
Z.Phys.C 43 (1989) 25, 1989.
Inspire Record 276686 DOI 10.17182/hepdata.15456

The production of neutral strange particlesKso, Λ and\(\bar \Lambda \) has been studied in 60 and 200 GeV per nucleon OAu and pAu collisions with the streamer chamber vertex spectrometer of the NA35 experiment at the CERN-SPS accelerator. Ratios of neutral strange particle production to negatively charged particle production in selected regions of phase space were measured to be the same in OAu and pAu reactions. The rates of strange particle production in central OAu collisions are about a factor of 16 higher than in pAu collisions when compared in the same regions of phase space. If an enhancement of strange particle production in OAu collisions relative to pAu collisions is considered to be a signature for quark-gluon plasma formation, no evidence supporting it is observed. The experimental results are compared to the Lund FRITIOF model.

22 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Limiting Fragmentation in Oxygen Induced Emulsion Interactions at 14.6-a/{GeV}, 60-a/{GeV} and 200-a/{GeV}

The EMU01 collaboration Adamovich, M.I. ; Aggarwal, M.M. ; Arora, R. ; et al.
Phys.Rev.Lett. 62 (1989) 2801, 1989.
Inspire Record 268021 DOI 10.17182/hepdata.20041

Pseudorapidity distributions of relativistic singly charged particles in oxygen-induced emulsion interactions at 14.6, 60, and 200 GeV/nucleon are studied. Limiting fragmentation behavior is observed in both the target and projectile fragmentation regions for a central as well as for a minimum-bias sample. Comparisons with the fritiof model reveal that the picture of fragmenting strings successfully describes the observed data.

2 data tables
Table 1

NUCLEUS IS AVERAGE NUCLEUS OF EMULSION.

Table 2

NUCLEUS IS AVERAGE NUCLEUS OF EMULSION.


Charged Particle Multiplicities and Interaction Cross-sections in High-energy Nuclear Collisions

The NA35 collaboration Bamberger, A. ; Bangert, D. ; Bartke, J. ; et al.
Phys.Lett.B 205 (1988) 583-589, 1988.
Inspire Record 262284 DOI 10.17182/hepdata.42035

Inelastic cross sections at 60 and 200 GeV/nucleon are determined in a streamer chamber for 16 O on several nuclear targets. Charged particle multiplicity distributions for inelastic and central collisions are studied and compared with theoretical predictions. The inelastic cross section exhibit a geometrical dependence on nuclear radii. The multiplicity data are governed by the collision geometry. They are consistent with a picture of superposition of independent nucleon-nucleus interactions.

2 data tables
Table 1

Minimum bias events.

Table 2

Hard veto and hard Et events.


Recent Results From the Na35 Collaboration at {CERN}

The NA35 collaboration Harris, J.W. ; Bamberger, A. ; Bangert, D. ; et al.
Nucl.Phys.A 498 (1989) 133C-150C, 1989.
Inspire Record 271884 DOI 10.17182/hepdata.36948

Recent results from the NA35 Collaboration are presented for the reactions of 60 and 200 GeV/nucleon p and 16 O, and 200 GeV/nucleon 32 S with various targets ranging from S to Au. Midrapidity transverse energy distributions and forward energy flow, p⊥ spectra and rapidity distributions of hadrons are presented. Two-pion interferometry results are discussed. Neutral strange particle yields and p⊥ distributions are presented. Conclusions are drawn from the experimental results.

7 data tables
Table 1

No description provided.

Table 2

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Table 3

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Observation of the Decay $\rho \to \pi^+ \pi^- \gamma$. (In Russian)

Vasserman, I.B. ; Golubev, V.B. ; Dolinsky, S.I. ; et al.
Sov.J.Nucl.Phys. 47 (1988) 1035-1037, 1988.
Inspire Record 272215 DOI 10.17182/hepdata.37130

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Study of the Energy Flow in $^{16}$O Nucleus Collisions at 60-{GeV}/nucleon and 200-{GeV}/nucleon

The NA35 collaboration Heck, W. ; Bamberger, A. ; Bangert, D. ; et al.
Z.Phys.C 38 (1988) 19, 1988.
Inspire Record 262285 DOI 10.17182/hepdata.37151

We report a systematic study of mid-rapidityET production and forward energy flow in the interaction of16O projectiles on Al, Cu, Ag and Au at 60 and 200 GeV/nucleon. First results onET production with32S projectiles are presented.

0 data tables

Study of Light Meson Radiative Decays

Bityukov, S.I. ; Borisov, G.V. ; Viktorov, V.A. ; et al.
Sov.J.Nucl.Phys. 47 (1988) 800, 1988.
Inspire Record 253771 DOI 10.17182/hepdata.40758

None

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Correlations Among Particles Produced in Proton Interactions With Emulsion Nuclei at 800-{GeV}

Barbier, L.M. ; Jones, W.V. ; Wefel, J.P. ; et al.
Phys.Rev.D 37 (1988) 1113, 1988.
Inspire Record 256580 DOI 10.17182/hepdata.3823

Correlations among the produced particles in interactions of 800-GeV protons with nuclei in photographic emulsion provide evidence for nonindependent production of the secondary particles. Assuming particle production in clusters, the analysis implies an average multiplicity of about 3 charged particles per cluster.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

IN THIS TABLE ETARAP(P=3)=ETARAP(P=4).

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rivet Analysis
Determination of $\alpha^- s$ From Energy-energy Correlations in $e^+ e^-$ Annihilation at 29-{GeV}

Wood, D.R. ; Petersen, A. ; Abrams, G.S. ; et al.
Phys.Rev.D 37 (1988) 3091, 1988.
Inspire Record 250899 DOI 10.17182/hepdata.23323

We have studied the energy-energy correlation in e+e− annihilation into hadrons at √s =29 GeV using the Mark II detector at the SLAC storage ring PEP. We find to O(αs2) that αs=0.158±0.003±0.008 if hadronization is described by string fragmentation. Independent fragmentation schemes give αs=0.10–0.14, and give poor agreement with the data. A leading-log shower fragmentation model is found to describe the data well.

6 data tables
Table 1

Correlation data from the original PEP-5 detector.

Table 2

Correlation Asymmetry data from the original PEP-5 detector.

Table 3

Correlation data from the upgraded detector.

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rivet Analysis
Multi - Hadronic Events at E(c.m.) = 29-GeV and Predictions of QCD Models from E(c.m.) = 29-GeV to E(c.m.) = 93-GeV

Petersen, A. ; Abrams, G.S. ; Adolphsen, Chris ; et al.
Phys.Rev.D 37 (1988) 1, 1988.
Inspire Record 246184 DOI 10.17182/hepdata.4114

Multihadronic e+e− annihilation events at a center-of-mass energy of 29 GeV have been studied with both the original (PEP 5) Mark II and the upgraded Mark II detectors. Detector-corrected distributions from global shape analyses such as aplanarity, Q2-Q1, sphericity, thrust, minor value, oblateness, and jet masses, and inclusive charged-particle distributions including x, rapidity, p⊥, and particle flow are presented. These distributions are compared with predictions from various multihadron event models which use leading-logarithmic shower evolution or QCD matrix elements at the parton level and string or cluster fragmentation for hadronization. The new generation of parton-shower models gives, on the average, a better description of the data than the previous parton-shower models. The energy behavior of these models is compared to existing e+e− data. The predictions of the models at a center-of-mass energy of 93 GeV, roughly the expected mass of the Z0, are also presented.

74 data tables
Table 1

Aplanarity distribution.

Table 2

QX Distribution(QX=SQRT(3)*(Q3-Q2)).

Table 3

The (Q2-Q1) distribution.

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