Details

Autor(en) / Beteiligte

• Adamova, D.
• Kushpil, V.
• Sumbera, M.
• Agakichiev, G.
• Antonczyk, D.
• Braun-Munzinger, P.
• Busch, O.
• Garabatos, C.
• Hering, G.
• Holeczek, J.
• Maas, A.
• Marin, A.
• Miskowiec, D.
• Radomski, S.
• Rak, J.
• Sako, H.
• Sedykh, S.
• Tsiledakis, G.
• Appelshaeuser, H.
• Belaga, V.

Titel

Leptonic and Charged Kaon Decay Modes of the {phi} Meson Measured in Heavy-Ion Collisions at the CERN Super Proton Synchrotron

Ist Teil von

• Physical review letters, 2006-04, Vol.96 (15)

Ort / Verlag

United States

Erscheinungsjahr

2006

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We report on results of a measurement of {phi} meson production in central Pb-Au collisions at E{sub lab}=158A GeV. For the first time in the history of high energy heavy-ion collisions, {phi} mesons were reconstructed both in the K{sup +}K{sup -} 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 {phi} 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.