Phys. Rev. C 71, 064907 (2005) [8 pages]Kaon and pion emission in asymmetric C+Au and Au+C collisions at 1.0A GeV and 1.8A GeVReceived 19 November 2004; published 30 June 2005 The emission of K+ and π± mesons has been studied in the asymmetric collision system Au+C and in the inverse reaction C+Au at 1.0A GeV (and at 1.8A GeV for C+Au only) in order to extract the effective source rapidities based on their distribution in the pt-y plane. The extracted source rapidity of K+ mesons is about ys/ybeam=0.25 at both incident energies [y(Au)=0,y(C)=ybeam]. This corresponds to a reaction volume consisting of the C nucleus and a tube cut out of the Au nucleus. In clear contrast, the source rapidities of π± mesons vary from ys/ybeam=0.5 in peripheral collisions (corresponding to NN interactions) to about ys/ybeam<0.33 in central reactions. The multiplicities of K+ and π are compared to symmetric collision systems and, together with detailed transport model calculations, are used to study the sensitivity to the nuclear equation of state. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.71.064907
DOI:
10.1103/PhysRevC.71.064907
PACS:
25.75.Dw
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