European Organization for Nuclear Research Measurement of the Polarization of 0 , 0 , + and ? Produced in a ? Beam of 330 Gev/c the Wa89 Collaboration

CollaborationM, . I. Adamovich, E. Albertson,Yu. A. Alexandrov, D. Barberis, C. B erat, W. Beusch, K. H. Brenzinger, S. Brons,W. Br uckner, A. Brunengo, F. Charignon, J. Chauvin, E. A. Chudakov, M. Dameri, F. Dropmann, J. Engelfried, F. Faller, B. R. French,S. G. Gerassimov, M. Godbersen,P. Grafstr om, J. Y. Hostachy, R. B. Hurst, Th. Kallakowsky, S. Kluth, H. M. Lauber, P. Lennert, S. Ljungfelt, K. Martens,Ph. Martin,R. Michaels, U. M uller, C., Newsomf, B. Osculati, S. Paul, B. Povh, - M.Rey, Campagnolle, H. Rieseberg, K. R ohrich, G. Rosner, L. Rossi, H. Rudolph, Scheelh, L. Schmitt, H.-W. Siebert, A. Simon, A. Trombini, R. Touillon, B. Volkemer, Th. Walcher, G. W alder, A. Wenzel, M. V. Zavertyaev

semanticscholar（2007）

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摘要

The polarization of 0 , 0 , + and ? inclusively produced in ? induced interactions at 330 GeV has been measured in the experiment WA89 at CERN. This is the rst measurement of polarization of baryons produced by a hyperon beam. No polarization of 0 is observed, as was also the case in proton beam data. At transverse momenta of about 1 GeV/c 0 and + show little polarization, signiicantly lower than in the proton beam data, while ? have a polarization comparable to the polarization of 0 produced in proton beams.

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