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We present a study of differential two jet ratios in multi-hadronic final states produced by e + e - annihilation in the AMY detector at TRISTAN. The data are compared to the predictions of the next-to-leading logarithm parton-shower (NLL PS) Monte Carlo and the O(α 2s ) matrix element QCD models. We determine the strong coupling strength α s (57.3 GeV) = 0.130...
Using e + e - annihilation events accumulated with the AMY detector at the TRISTAN collider, we have studied the Bose-Einstein correlations in the distributions of like-sign charged tracks. As reference samples we used the opposite-sign charged track pairs and mixed pairs, which are like-sign pairs synthesized from tracks belonging to different events. The results of the different...