| Autor: |
Adamová D; NPI/ASCR, Rez, Czech Republic., Agakichiev G, Antończyk D, Appelshäuser H, Belaga V, Bielcíková J, Braun-Munzinger P, Busch O, Cherlin A, Damjanovic S, Dietel T, Dietrich L, Drees A, Esumi SI, Filimonov K, Fomenko K, Fraenkel Z, Garabatos C, Glässel P, Hering G, Holeczek J, Krobath G, Kushpil V, Ludolphs W, Maas A, Marín A, Milosević J, Miśkowiec D, Ortega R, Panebrattsev Y, Petchenova O, Petrácek V, Radomski S, Rak J, Ravinovich I, Rehak P, Sako H, Schmitz W, Schukraft J, Sedykh S, Shimansky S, Stachel J, Sumbera M, Tilsner H, Tserruya I, Tsiledakis G, Wessels JP, Wienold T, Wurm JP, Yurevich S, Yurevich V |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2006 Apr 21; Vol. 96 (15), pp. 152301. Date of Electronic Publication: 2006 Apr 21. |
| DOI: |
10.1103/PhysRevLett.96.152301 |
| Abstrakt: |
We report on results of a measurement of meson production in central Pb-Au collisions at E(lab) = 158A GeV. For the first time in the history of high energy heavy-ion collisions, phi 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 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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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