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Leptonic and charged kaon decay modes of the $phi$ meson measured in heavy-ion collisions at the CERN SPS | | D. Adamova
; CERES Collaboration
; | | Date: |
3 Dec 2005 | | Abstract: | We report a measurement of $phi$ meson production in central Pb+Au collisions at E$_{lab}$/A=158 GeV. For the first time in heavy-ion collisions, $phi$ mesons were reconstructed in the same experiment both in the K$^+$K$^-$ and the dilepton decay channel. Near mid-rapidity, this yields rapidity densities, corrected for production at the same rapidity value, 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 spectra is also in close agreement in both decay channels. The data rule out a possible enhancement of the $phi$ yield in the leptonic over the hadronic channel by a factor larger than 1.6 at 95% CL. | | Source: | arXiv, nucl-ex/0512007 | | Services: | Forum | Review | PDF | Favorites | |
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