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Direct electron pair production by 6.4-TeV S-32 emulsion interactions

Kamel, S. ;
Phys.Lett.B 368 (1996) 291-298, 1996.
Inspire Record 428062 DOI 10.17182/hepdata.28411

A search for direct electron pairs was performed at the 6.4 TeV 32 S emulsion interactions at CERN. A total of 81 directly produced electron pairs have been observed, with an average number per interaction of about two. The results have been analysed in the light of the predictions of quantum electrodynamical calculations. A simple interpretation for the extracted results based on the virtual mass distribution is presented. The experimental results are in partial agreement with the present theories. The virtual mass distribution does not show a 1/m behaviour.

2 data tables
Table 1

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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.

3 data tables
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Table 3

THE FORWARD AND BACKWARD HEMISPHERE ARE DEFINED AS MULT(Q=FORWARD) WHEN COS(THETA) > 0 AND MULT(Q=BACKWARD) WHEN COS(THETA) < 0.


Comparison of nucleus-nucleus interactions at 14.5-A/GeV - 200-A/GeV with the multistring model VENUS

Jain, P.L. ; Singh, G. ; Sengupta, K. ;
Phys.Rev.C 43 (1991) 2027-2030, 1991.
Inspire Record 314429 DOI 10.17182/hepdata.26179

None

6 data tables
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On the production of fast and slow particles in nucleus-nucleus collisions at ultrarelativistic energies

Jain, P.L. ; Sengupta, K. ; Singh, G. ;
Phys.Rev.C 44 (1991) 844-853, 1991.
Inspire Record 315632 DOI 10.17182/hepdata.26111

Multiplicity and angular distributions of shower, grey, and black particles produced in the interactions of S32 at 200A GeV, O16 at 200 and 60A GeV, and He4 at ∼140A GeV in emulsion are compared with the predictions of a Monte Carlo code which takes into account the internuclear cascading. The correlations between the various parameters belonging to the same or to the different kinds of particles are discussed. The data on shower and grey particles from all the beams are well described by the code. However, the black prong data show a significant departure from this model.

6 data tables
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On the Production of Helium Fragments in Ultrarelativistic Heavy Ion Collisions

Sengupta, K. ; Singh, G. ; Jain, P.L. ;
Phys.Lett.B 222 (1989) 301-305, 1989.
Inspire Record 25611 DOI 10.17182/hepdata.29805

Partial production cross sections of projectile alpha fragments produced in high-energy interactions of 16 O and 32 S at 200 GeV/n and 16 O at 60 GeV/n in emulsion are studied. Evidence of multiplicity scaling of such produced fragments is presented in the energy range 2–200 GeV/n for various projectiles.

7 data tables
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