A measurement of polarization in inclusive production by of 340 GeV /c in C and Cu targetsThe WA89 Collaboration
(Received: 2 April 2003 / / Published online: 27 November 2003)
We have measured the polarization of hyperons produced inclusively by a beam of 340 momentum in nuclear targets. From a sample of 9.5 millions of identified decays, polarizations were determined in the range xF>0.1 and . The polarization w.r.t. the production normal is mainly positive for 0.3. At fixed values of xF, it increases with pt to a maximum between pt=0.5 and pt=1 , and then decreases to zero or even negative values, in sharp contrast to the plateau above pt=1 observed in inclusive production by protons.
© Società Italiana di Fisica, Springer-Verlag 2004