2004
Journal Article
Title

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

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.
Author(s)
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.
Journal
DOI
Language
English