| Strangeness enhancement at mid-rapidity in Pb-Pb collisions at 158 (2007) | |||||||||||||
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| K 0 S , #, #,# and negative particle yields and transverse mass spectra have been measured at central rapidity in Pb-Pb and p-Pb collisions at 158 A GeV/c. Yields are studied as a function of the number of nucleons participating in the collision N part , which is estimated with the Glauber model. From p-Pb to Pb-Pb collisions the particle yields per participant increase substantially. The enhancement is more pronounced for multistrange particles, and exceeds an order of magnitude for the# . For a number of participants, N part , greater than 100, however, all yields per participant appear to be constant. To be published in Physics Letters B 1) Dipartimento I.A. di Fisica dell'Universita e del Politecnico di Bari and Sezione INFN, Bari, Italy 2) Fysisk institutt, Universitetet i Bergen, Bergen, Norway 3) Hgskolen i Bergen, Bergen, Norway 4) School of Physics and Astronomy, University of Birmingham, Birmingham, UK 5) CERN, European Laboratory for Particle Physics, Geneva, S... | |||||||||||||
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