Measurement of the polarization of $$\Lambda ^0 , \overline \Lambda  ^0 , \Sigma ^ +  $$ and Ξ produced in a Σ beam of 330 GeV/c

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI(1995)

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摘要
The polarization of Lambda(0), ($) over bar Lambda(0), Sigma(+) and Xi(-) inclusively produced in Sigma(-) induced interactions at 330 GeV has been measured in the experiment WA89 at CERN. This is the first measurement of polarization of baryons produced by an unpolarized hyperon beam. No polarization of ($) over bar Lambda(0) is observed, as was also the case in proton beam data. At transverse momenta of about 1 GeV/c Lambda(0) and Sigma(+) show little polarization, significantly lower than in the proton beam data, while Xi(-) have a polarization comparable to the polarization of Lambda(0) produced in proton beams.
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