TY - JOUR A1 - Anikina, M. Kh. A1 - Gaździcki, Marek A1 - Golochvastov, A. I. A1 - Goncharov, L. A1 - Iovchev, K. A1 - Khorozov, Sergey Aleksandrovich A1 - Kuznetzova, E. A1 - Lukstins, Juris A1 - Okonov, Edgar A1 - Ostanievich, T. A1 - Sidorin, S. A1 - Vardenga, G. A1 - Balea, O. A1 - Nikirovich, N. A1 - Ponta, Titus Corneliu A1 - Chkhaidze, L. A1 - Djobava, Tamar A1 - Despotashvili, M. A1 - Tuliani, I. A1 - Khusaimov, E. A1 - Nurgozin, N. A1 - Suleimenov, B. A1 - Skrzypczak, Ewa A1 - Tymieniecka, Teresa T1 - Lambda hyperons produced in central nucleus-nucleus interactions at 4.5 GeV/c momentum per incident nucleon T2 - Physical review letters N2 - Transverse momenta and rapidities of Lambda 's produced in central nucleus-nucleus collisions at 4.5 GeV/c·u (C-C,...,O-Pb) were studied and compared with those from inelastic He-Li interactions at the same incident momentum. Polarization of the Lambda hyperons was found to be consistent with zero ( alpha P=-0.06=0.11 for Lambda 's from central collisions). An upper limit of the Lambda -bar / Lambda production ratio was estimated to be less than 4.5 x 10-3. The experiment was performed in a triggered streamer chamber. Y1 - 2005 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3755 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30-17389 VL - 50 IS - 25 SP - 1971 EP - 1974 PB - The American Physical Society ER -