INELASTIC SCATTERING AMPLITIJDES”
New results from inelastic two-body scattering reactions are reviewed. Although predictions of SU(3), factorization and simple Regge theory are found to be qualitatively in agreement with the data, direct channel or absorption effects afford the simplest interpretation of the detailed features of the scattering amplitudes.
Measurement of the polarization in K−p→K0n charge exchange at 8 GeV/c☆
Abstract The K−p → K 0n polarization has been measured at 8 GeV/c and for −t values ranging from 0 up tp 1.2 (GeV/c)2. A negative polarization has been found.
Performance of a large magnet spark chamber
Abstract The description of a 60 × 67 × 160 cm3 spark chamber in a 10.5 kG magnetic field and a report on its performance are given. This instrument was used at the CERN Proton Synchrotron for the detection of the neutral (and non-π0) reaction products of π−, K− and p on hydrogen. The sources of the systematic deviations in spark position have been investigated and corrections have been devised to compensate for them. The residual random errors are: 1. 1. the rms deviation of individual sparks from the fitted trajectory σy = 0.18 mm in space. 2. 2. the rms measurement error σy meas = 0.09 mm in space. The MDM of the instrument is 1000 GeV/c and the rms error in the mass of K10 mesons of 7 GeV/c momentum is Δm = 7.3 MeV/c2.