Schwalb, O.
NUCLEUS NUCLEUS --> PI0 X
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Mass dependence of pi0 production in heavy ion collisions at 1-A/GeV

Schwalb, O. ; Pfeiffer, M. ; Berg, F.-D. ; et al.
Phys.Lett.B 321 (1994) 20-25, 1994.
Inspire Record 376130 DOI 10.17182/hepdata.28781

The production of neutral pions has been studied in the reactions 40 Ar + nat Ca , 86 Kr + nat Zr and 197 Au + 197 Au at 1 A GeV. For high energy pions emitted from the heavier systems a steeper than linear rise of the pion multiplicity with the centrality of the reaction is observed, indicating a pion production process other than binary nucleon-nucleon collisions. At low transverse momenta an enhancement of the π 0 -multiplicity increasing with the mass of the collision system is found. Systematic discrepancies between the experimental results and recent BUU, QMD and Cascade calculations are discussed.

6 data tables
Table 1

No description provided.

Table 2

RESULTS OF AN EXTRAPOLATION TO THE FULL SOLID ANGLE TAKING THE EXPERIMENTALTEMPERATURES INTO ACCOUNT.

Table 3

No description provided.

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Production of eta mesons in 200-A/GeV S + S and S + Au reactions

The WA80 collaboration Albrecht, R. ; Antonenko, V. ; Awes, T.C. ; et al.
Phys.Lett.B 361 (1995) 14-20, 1995.
Inspire Record 397305 DOI 10.17182/hepdata.41686

Minimum Bias production cross sections of $\eta$ mesons have been measured in 200AGeV S+Au and S+S collisions at the CERN SPS by reconstructing the $\eta\rightarrow\gamma\gamma$ decay. The measurements have been made over the rapidity range $2.1 \leq y \leq 2.9$ using the leadglass spectrometer of WA80. Within the statistical and systematical uncertainties the spectral shapes of $\pi~0$ and $\eta$ mesons yields are identical when their invariant differential cross section is plotted as a function of the transverse mass. The relative normalization of the $\eta$ to $\pi~0$ transverse mass spectra is found to be $0.53 \pm 0.07$ for S+Au and $0.43 \pm 0.15$ for S+S reactions. Extrapolation to full phase space leads to an integrated cross section ratio of $\eta$ to $\pi~0$ mesons of $0.15 \pm 0.02 {\rm (stat.)} \pm 0.02 {\rm (syst.)}$, and $0.12 \pm 0.03 {\rm (stat.)} \pm 0.02 {\rm (syst.)}$ for S+Au and S+S collisions, respectively.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Single photon and neutral meson production from WA80

The WA80 collaboration Santo, R. ; Albrecht, R. ; Awes, T.C. ; et al.
Nucl.Phys.A 566 (1994) 61C-68C, 1994.
Inspire Record 36273 DOI 10.17182/hepdata.9268

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Neutral meson production in relativistic heavy ion collisions

The TAPS collaboration Berg, F.D. ; Boonstra, A. ; Braak, H.P. ; et al.
Z.Phys.A 340 (1991) 297-302, 1991.
Inspire Record 324774 DOI 10.17182/hepdata.16588

The production ofπ0 andη mesons has been studied in the reactions20Ne +Al at 350 MeV/u and40Ar + Ca at 1.0 GeV/u. Rapidity distributions and transverse momentum spectra have been measured and are compared to thermal distributions.

2 data tables
Table 1

THE SPECTRUM (1/PT)*D(SIG)/D(PT) HAS BEEN FITTED BY A THERMAL DISTRIBUTION SQRT(MT)*EXP(-SLOPE*MT).

Table 2

THE SPECTRUM (1/PT)*D(SIG)/D(PT) HAS BEEN FITTED BY A THERMAL DISTRIBUTION SQRT(MT)*EXP(-SLOPE*MT).


Production of $\gamma$ Quanta and Neutral Strange Particles in $d$ Ta and C Ta Interactions at 4.2-{GeV}/$c$ Per Nucleon

The Baku-Belgrade-Bucharest-Varna-Warsaw-Dubna-Yerevan-Kishinev-Moscow- Prague-Sofiya-Tbilisi-Ulan Bator collaboration Akhababian, N. ; Baatar, Ts. ; Baldin, A.M. ; et al.
Sov.J.Nucl.Phys. 37 (1983) 738, 1983.
Inspire Record 179220 DOI 10.17182/hepdata.39602

None

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.