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Pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV: Evidence for the onset of deconfinement

The NA49 collaboration Alt, C. ; Anticic, T. ; Baatar, B. ; et al.
Phys.Rev.C 77 (2008) 024903, 2008.
Inspire Record 762554 DOI 10.17182/hepdata.25169

Results on charged pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV are presented and compared to data at lower and higher energies. A rapid change of the energy dependence is observed around 30A GeV for the yields of pions and kaons as well as for the shape of the transverse mass spectra. The change is compatible with the prediction that the threshold for production of a state of deconfined matter at the early stage of the collisions is located at low SPS energies.

13 data tables
Table 1

Transverse mass spectra for pion production in the central rapidity region for collisions at 20 GeV per nucleon.

Table 2

Transverse mass spectra for pion production in the central rapidity region for collisions at 30 GeV per nucleon.

Table 3

Transverse mass spectra for kaon production in the central rapidity region for collisions at 20 GeV per nucleon.

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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.

13 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

MEAN MULTIPLICITY OF N N COLLISIONS IS DEDUCED FROM PROTON-PROTON DATA.

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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.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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THE STUDY OF anti-n n INTERACTIONS AT 6.1-GeV/c

The Dubna-Bucharest-Yerevan-Kosice-Moscow-Prague-Sofiya collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Bruncko, D. ; et al.
Sov.J.Nucl.Phys. 48 (1988) 475, 1988.
Inspire Record 253864 DOI 10.17182/hepdata.9420

None

21 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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GENERAL FEATURES OF MULTIPARTICLE PRODUCTION IN INELASTIC anti-n p INTERACTIONS AT 6.1-GeV/c

The Dubna-Moscow-Bucharest-Sofiya collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Bruncko, D. ; et al.
Sov.J.Nucl.Phys. 46 (1987) 856, 1987.
Inspire Record 246883 DOI 10.17182/hepdata.38926

None

6 data tables
Table 1

No description provided.

Table 2

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Table 3

No description provided.

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MULTIPLICITY DISTRIBUTION OF CHARGED PARTICLES IN anti-n p AND n p INTERACTIONS AND anti-n p ANNIHILATION AT 6.1-GeV/c

The Dubna-Bucharest-Kosice-Moscow-Sofiya collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Bruncko, D. ; et al.
Sov.J.Nucl.Phys. 47 (1988) 83, 1988.
Inspire Record 239906 DOI 10.17182/hepdata.39004

None

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


CHARACTERISTICS OF CHARGED PARTICLE MULTIPLICITY IN anti-n n AND n n INTERACTIONS AND anti-n n ANNIHILATION PROCESSES AT 6.1-GeV

The Dubna-Bucharest-Yerevan-Kosice-Moscow-Prague-Sofiya-Tbilisi collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Bruncko, D. ; et al.
Czech.J.Phys.B 36 (1986) 1273, 1986.
Inspire Record 222985 DOI 10.17182/hepdata.38975

Topological cross sections and characteristics of charged particle multiplicity distributions for¯nn andnn interactions and¯nn annihilations at 6·1 GeV/c are presented. KNO-distributions for¯nn andnn interactions are very similar. Characteristics for¯nn and¯pp annihilations are identical at equal energies.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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