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Experimental study of four-prong events in proton proton interactions at 13.1 gev/c

Le Guyader, J. ; Sene, M. ; Ginestet, J. ; et al.
Nucl.Phys.B 35 (1971) 573-591, 1971.
Inspire Record 75410 DOI 10.17182/hepdata.33033

Approximately 21 000 four-prong pp interactions at 13.1 GeV/ c have been studied using the CERN 2m hydrogen bubble chamber. The following reactions have been analyzed pp→ppπ + π − (1) pp→ppπ + π − π 0 (2) pp→ppπ + π + π − (3) The Δ-production is the dominant feature. We also observed the pππ decay of the N ∗ (1470) and N ∗ (1690). The ϱis weakly produced in the three reactions. The η and the α are observed in the reaction (2) and the presence of a ω isobar is discussed. Then the kinematical characteristics of the final particles are described.

2 data tables
Table 1

NORMALIZED TO A TOTAL CROSS SECTION OF 39.6 +- 0.2 MB.

Table 2

RESONANCE PRODUCTION ESTIMATED BY CUTS WITH MONTE-CARLO AND HAND-DRAWN PHASE SPACE DISTRIBUTIONS.