XI-(1320) AND XI-(1530) PRODUCTION IN K-P INTERACTIONS AT 4.2 GEV-C
NUCLEAR PHYSICS B 178:1 (1981) 1-30
Evidence for a spin-1 gluon in three-jet events
Physics Letters B 97:3-4 (1980) 453-458
Abstract:
High-energy e+e--annihilation events obtained in the TASSO detector at PETRA have been used to determine the spin of the gluon in the reaction e+e- → qqg. We analysed angular correlations between the three jet axes. While vector gluons are consistent with the data (55% confidence limit), scalar gluons are disfavoured by 3.8 standard deviations, corresponding to a confidence level of about 10-4. Our conclusion is free of possible biases due to uncertainties in the fragmentation process or in determining the qqg kinematics from the observed hadrons. © 1980.RHO-RHO production by two photon scattering
Physics Letters B 97:3-4 (1980) 448-452
Production and properties of the τ-lepton in e+e- annihilation at C.M. energies from 12 to 31.6 GeV
Physics Letters B 92:1-2 (1980) 199-205
Abstract:
We have observed τ production in e+e- annihilation at centre-of-mass energies between 12 and 31.6 GeV with cross sections in agreement with the QED τ-pair cross section. Branching ratios for τ decay have been measured and are consistent with the world averages. We have determined the cutoff parameters of QED Λ+ (Λ-) to be > 73 GeV (82 GeV) and have obtained an upper limit on the τ lifetime of 1.4 × 10-12 s(95% CL). © 1980.Rapid growth of charged particle multiplicity in high energy e+e- annihilations
Physics Letters B 89:3-4 (1980) 418-422