CERN Accelerating science

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Title A measurement of ΛΛ polarization in inclusive production by ΣΣ of 340-GeV/c in C and Cu targets
Author(s) Adamovich, M I (LPI, Moscow (main)) ; Alexandrov, Yu A (LPI, Moscow (main)) ; Baranov, S P (LPI, Moscow (main)) ; Barberis, D (Genoa U. ; INFN, Genoa) ; Beck, M (Heidelberg, Max Planck Inst.) ; ́erat, C B (Grenoble, CEN) ; Beusch, W (CERN) ; Boss, M (Heidelberg U.) ; Brons, S (Heidelberg, Max Planck Inst.) ; Brückner, W (Heidelberg, Max Planck Inst.) 顯示全部 64 名作者
Collaboration WA89
Publication 2003
Imprint 2004
Number of pages 8
In: Eur. Phys. J. C 32 (2004) 221-228
DOI 10.1140/epjc/s2003-01357-3
Subject category Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; WA89
Abstract We have measured the polarization of ΛΛ hyperons produced inclusively by a ΣΣ beam of 340 GeV/c momentum in nuclear targets. From a sample of 9.5 millions of identified ΛΛ decays, polarizations were determined in the range xF>0.1xF>0.1 and pt1.6pt1.6 GeV/c . The polarization w.r.t. the production normal is mainly positive for xF0.3xF0.3. At fixed values of xFxF, it increases with ptpt to a maximum between pt=0.5pt=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 Λ production by protons.

Corresponding record in: Inspire


 記錄創建於2018-08-11,最後更新在2018-08-11



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