Abstract
We report on results of a measurement of meson production in central Pb-Au collisions at Elab=158AGeV. For the first time in the history of high energy heavy-ion collisions, mesons were reconstructed both in the K+K- and the dilepton decay channels in the same experiment. This measurement yields rapidity densities near midrapidity, from the two decay channels, of 2.05±0.14(stat)±0.25(syst) and 2.04±0.49(stat)±0. 32(syst), respectively. The shape of the measured transverse momentum spectrum is also in close agreement in both decay channels. The data rule out a possible enhancement of the yield in the leptonic over the hadronic decay channel of a factor 1.6 or larger at the 95% C.L. This rules out the discrepancy reported in the literature between measurements of the hadronic and dimuon decay channels by two different experiments.
| Original language | English |
|---|---|
| Article number | 152301 |
| Journal | Physical Review Letters |
| Volume | 96 |
| Issue number | 15 |
| DOIs | |
| State | Published - 2006 |
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