Production of Mesons in 200 Gev/ S+s and S+au Reactions
نویسندگان
چکیده
A c 1 2 3 0 0 0 Abstract ! 6 6 6 6 6 6 WA80 Collaboration A c : a g e d d b d d a d d d d f d c g c d c a f; d c g b d; g a g h h g f g e c c d e b a a d a c e;i e d a c d g f; e a. Minimum Bias production cross sections of mesons have been measured in 200 GeV/ S+Au and S+S collisions at the CERN SPS by reconstructing the decay. The measurements have been made over the rapidity range 2 1 2 9 using the leadglass spectrometer of WA80. Within the statistical and systematical uncertainties the spectral shapes of and mesons yields are identical when their invariant dierential cross section is plotted as a function of the transverse mass. The relative normalization of the to transverse mass spectra is found to be 0 53 0 07 for S+Au and 0 43 0 15 for S+S reactions. Extrapolation to full phase space leads to an integrated cross section ratio of to mesons of 0 147 0 017(stat) 0 015(syst), and 0 120 0 034(stat) 0 022(syst) for S+Au and S+S collisions, respectively. q cm T T T T T T T T T T 0 0 2 0 2 0 0 lab m m p m p p p m p m m c m : # :
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