Previously published and as yet unpublished QCD results obtained with the ALEPH detector at LEP1 are presented. The unprecedented statistics allows detailed studies of both perturbative and non-perturbative aspects of strong interactions to be carried out using hadronic Z and tau decays. The studies presented include precise determinations of the strong coupling constant, tests of its avour independence, tests of the SU(3) gauge structure of QCD, study of coherence eects, and measurements of single-particle inclusive distributions and two-particle correlations for many identied baryons and mesons.

(To be submitted to Nucl. Instr. Meth. A) described. electrons, muons, neutrinos (from missing energy), charged hadrons, ·rr°'s and V°'s is of the detector is its ability to identify particles; the performance in identification of hadrons, and the accuracy obtained in energy and angle is given. An essential property of charged tracks is specified. Calorimeters are used to measure photons and neutral accuracy of the tracking detectors to measure the impact parameter and momentumThe performance of the ALEPH detector at the LEP e+e' collider is reviewed. The Abstract The ALEPH Collaboration" Performance of the ALEPH detector at LEP

A partial-wave analysis (PWA) of the J/$-yK;K*?rF, y~*~T ? r o decays in the ~/7(1430) mass range shows a clear pseudoscalar dominance, with two dynamical components both above 1400 Mev/c2 which proceed via ao(980)?r and K *(892)K dynamics, respectively. In addition, a significant contribution from the I + + K * ( 892)K wave is contained in the higher part of the mass spectrum. In the PWA of the J/$-yr]ac?r-channel a resonant ao?r production is observed but slightly below 1400 Mev/c2. PACS number(s): 14.40. Cs, 13.25.+m, 13.40.Hq

Hadronic decays of the J / $ involving I$ and w production are investigated: J/+-+&+a-, $ K + K -, +K!Kg, w K + K -, ~K~O K ; , I$K*x, 4pp. Except I$K * E and $pp, these three-body final states are dominated by quasi-two-body productions. A detailed study of the fo(975) production is presented. The analysis shows evidence for the f2(1720) being associated to both o and 4. An upper limit is given for the I$q( 1440) branching ratio.