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A measurement of lambda polarization in inclusive production by Sigma- of 340 GeV/c in C and Cu targets

 
: Adamovich, M.I.; Alexandrov, Y.A.; Baranov, S.P.; Barberis, D.; Beck, M.; Bérat, C.; Beusch, W.; Boss, M.; Brons, S.; Brückner, W.; Buénerd, M.; Busch, C.; Büscher, C.; Charignon, F.; Chauvin, J.; Chudakov, E.A.; Dersch, U.; Dropmann, F.; Engelfried, J.; Faller, F.; Fournier, A.; Gerassimov, S.G.; Godbersen, M.; Grafström, P.; Haller, T.; Heidrich, M.; Hubbard, E.; Hurst, R.B.; Königsmann, K.; Konorov, I.; Keller, N.; Martens, K.; Martin, P.; Masciocchi, S.; Michaels, R.; Müller, U.; Neeb, H.; Newbold, D.; Newsom, C.; Paul, S.; Pochodzalla, J.; Potashnikova, I.; Povh, B.; Ransome, R.; Ren, Z.; Rey-Campagnolle, M.; Rosner, G.; Rossi, L.; Rudolph, H.; Scheel, C.; Schmitt, L.; Siebert, H.-W.; Simon, A.; Smith, V.; Thilmann, O.; Trombini, A.; Vesin, E.; Volkemer, B.; Vorwalter, K.; Walcher, T.; Wälder, G.; Werding, R.; Wittmann, E.; Zavertyaev, M.V.

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The European physical journal. C, Particles and fields 32 (2004), No.2, pp.221-228
ISSN: 1434-6044
English
Journal Article
Fraunhofer ISE ()

Abstract
We have measured the polarization of hyperons produced inclusively by a - beam of 340 GeV/c momentum in nuclear targets. From a sample of 9.5 millions of identified decays, polarizations were determined in the range xF > 0.1 and p t < 1.6 GeV/c. The polarization w.r.t. the production normal is mainly positive for xF 0.3. At fixed values of xF, it increases with pt to a maximum between pt=0.5 and pt=1 GeV/c, and then decreases to zero or even negative values, in sharp contrast to the plateau above pt=1 GeV/c observed in inclusive A production by protons.

: http://publica.fraunhofer.de/documents/N-172149.html