Determination of the number of wounded nucleons in Pb+Pb collisions at 158 A GeV/c

The charged particle multiplicity distributions measured by two experiments, WA97 and NA57, in Pb+Pb collisions at 158 A GeV/c have been analyzed in the framework of the wounded nucleon model (WNM). We obtain a good description of the data within the centrality range of our samples. This allows us to make use of the measured multiplicities to estimate the number of wounded nucleons of the collision

A partial wave analysis of the centrally produced K+K- system in pp interactions at 300 GeV/c

A partial wave analysis of the centrally produced K+K- channel from the WA76 experiment has been performed and shows evidence for peaks in the S-wave due to the f(0)(1500) and f(J)(1710) with J = 0. The D-wave shows no evidence for a statistically significant contribution in the 1.7 GeV mass region. (C) 1999 Elsevier Science B.V. All rights reserved

A SPIN - PARITY ANALYSIS OF THE 3 pi SYSTEM PRODUCED IN THE REACTION pi+ d ---> pi- pi+ pi+ d AT 4-GeV/c

A spin-parity analysis of the low mass 3 pi system produced in the reaction pi /sup +/d to pi /sup -/ pi /sup +/ pi /sup +/d has been performed using data from an exposure of the CERN 2m bubble chamber to a pi /sup +/ beam of 4 GeV/c momentum. Unnatural parity states predominate, 1/sup +/ being much more significant than 0/sup -/ and 2 /sup -/. The J/sup P/=2/sup +/ contribution in the A/sub 2/ region was found to be (5+or-2)%