Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2007-10-26
J.Phys.Conf.Ser.110:032010,2008
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 8 figures. Talk at HEP07, Manchester, July 19-25, 2007; submitted to Journal of Physics: Conference Series
Scientific paper
10.1088/1742-6596/110/3/032010
We present new results on production of 3He and t obtained by the NA49 experiment in 20A, 30A, 40A and 80A GeV central Pb+Pb collisions at the CERN SPS. Transverse mass spectra and rapidity distributions for clusters measured over a large phase space domain are discussed. We observe a weak dependence of the mid-rapidity t/3He ratio on collision energy at SPS. The energy dependence of the total yield for 3He is remarkably reproduced by a statistical hadron gas model. A gradual decrease of the coalescence parameter B3 for 3He with $\sqrt {s_{NN}}$ is observed.In addition, a measurement of the yield of anti-deuterons in Pb+Pb reactions at SPS's top energy of $\sqrt {s_{NN}}$ = 17.2 GeV is presented.
for the NA49 Collaboration
Kolesnikov V. I.
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