Pion multiplicity in nuclear collisions

Gazdzicki, M. ; Roehrich, D. ;
Z.Phys.C 65 (1995) 215-223, 1995.
Inspire Record 398172 DOI 10.17182/hepdata.14107

Data on the mean multiplicity ofπ- produced in minimum bias proton-proton, proton-neutron and proton-nucleus interactions as well as central nucleus-nucleus collisions at momenta of 1.4–400 GeV/c per nucleon have been compiled and studied. The results for neutron-neutron and nucleon-nucleon interactions were then constructed. The dependence of the mean pion multiplicity in proton-nucleus interactions and central collisions of identical nuclei are studied as a function of the collision energy and the nucleus mass number. The number of produced pions per participant nucleon in central collisions of identical nuclei is found to be independent of the number of participants at a fixed incident momentum per nucleon. The mean multiplicity of negatively charged hadrons per participant nucleon for central nucleus-nucleus collisions is lower by about 0.12 than the corresponding multiplicity for nucleon-nucleon interactions atpLAB≲15 A·GeV/c, whereas the result at 200 A·GeV/c is above the corresponding nucleon-nucleon multiplicity. This may indicate change of the collision dynamics at high energy.

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Hadron spectra in hadron - nucleus collisions

Armutliiski, D. ; Baatar, Ts. ; Batsaikhan, Ts. ; et al.
JINR-P1-91-191, 1991.
Inspire Record 319258 DOI 10.17182/hepdata.38698

None

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On pion production intensities in hadron nucleus collisions.

Strugalska-Gola, E. ; Strugalski, Z. ; Sredniawa, B. ; et al.
JINR-E1-96-330, 1996.
Inspire Record 428911 DOI 10.17182/hepdata.39365

None

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Target associated particle production in ultrarelativistic nucleus-nucleus collisions

Sengupta, K. ; Jain, P.L. ; Singh, G. ;
Mod.Phys.Lett.A 6 (1991) 29-39, 1991.
Inspire Record 316958 DOI 10.17182/hepdata.37873

We report the multiplicity and angular distributions of the low energy target-associated particles from 32S and 16O induced reactions at 200 GeV/nucleon and 16O induced reactions at 60 GeV/nucleon in emulsion. The results are compared with the Monte-Carlo Code VENUS.

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Excitation of the Delta (1232) resonance in proton - nucleus collisions

Trzaska, M. ; Pelte, D. ; Lemaire, M. -C. ; et al.
Z.Phys.A 340 (1991) 325-331, 1991.
Inspire Record 314551 DOI 10.17182/hepdata.15689

The excitation of theΔ resonance is observed in proton collisions on C, Nb and Pb targets at 0.8 and 1.6 GeV incident energies. The mass E0 and widthΓ of the resonance are determined from the invariant mass spectra of correlated (p, π±)-pairs in the final state of the collision: The mass E0 is smaller than that of the free resonance, however by comparing to intra-nuclear cascade calculations, this reduction is traced back to the effects of Fermi motion, NN scattering and pion reabsorption in nuclear matter.

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Charged particle multiplicities in nuclear collisions at 200-GeV/N

The NA35 collaboration Bächler, J. ; Bartke, J. ; Bialkowska, H. ; et al.
Z.Phys.C 51 (1991) 157-162, 1991.
Inspire Record 320907 DOI 10.17182/hepdata.14983

Data on multiplicities of charged particles produced in proton-nucleus and nucleus-nucleus collisions at 200 GeV per nucleon are presented. It is shown that the mean multiplicity of negative particles is proportional to the mean number of nucleons participating in the collision both for nucleus-nucleus and proton-nucleus collisions. The apparent consistency of pion multiplicity data with the assumption of an incoherent superposition of nucleon-nucleon collisions is critically discussed.

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ANALYSIS OF TRANSVERSE ENERGY SPECTRA IN COLLISIONS OF LIGHT RELATIVISTIC NUCLEI

Mehdiyev, Rashid R. ; Cheplakov, A.P. ;
JINR-P1-88-760, 1988.
Inspire Record 268658 DOI 10.17182/hepdata.9419

None

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MULTIPLICITY OF NEGATIVE PIONS PRODUCED IN CENTRAL COLLISIONS OF RELATIVISTIC NUCLEI

Bartke, J. ; Chkhaidze, L. ; Gasparian, A. ; et al.
Sov.J.Nucl.Phys. 32 (1980) 361, 1980.
Inspire Record 144581 DOI 10.17182/hepdata.17870

None

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Xi and Antixi production in 158-GeV/nucleon Pb + Pb collisions.

The NA49 collaboration Appelshäuser, H. ; Bächler, J. ; Bailey, S.J. ; et al.
Phys.Lett.B 444 (1998) 523-530, 1998.
Inspire Record 477539 DOI 10.17182/hepdata.31330

We report measurements of Xi and Xi-bar hyperon absolute yields as a function of rapidity in 158 GeV/c Pb+Pb collisions. At midrapidity, dN/dy = 2.29 +/- 0.12 for Xi, and 0.52 +/- 0.05 for Xi-bar, leading to the ratio of Xi-bar/Xi = 0.23 +/- 0.03. Inverse slope parameters fitted to the measured transverse mass spectra are of the order of 300 MeV near mid-rapidity. The estimated total yield of Xi particles in Pb+Pb central interactions amounts to 7.4 +/- 1.0 per collision. Comparison to Xi production in properly scaled p+p reactions at the same energy reveals a dramatic enhancement (about one order of magnitude) of Xi production in Pb+Pb central collisions over elementary hadron interactions.

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Strangeness enhancement in central S + S collisions at 200-GeV/nucleon.

The NA35 collaboration Baechler, J. ; Bartke, J. ; Bialkowska, H. ; et al.
Nucl.Phys.A 525 (1991) 221C-226C, 1991.
Inspire Record 328899 DOI 10.17182/hepdata.36820

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