Energy Dependence of Pion and Kaon Production in Central Pb+Pb Collisions (CROSBI ID 94492)
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Podaci o odgovornosti
Afanasiev, S.V. ; Antičić, Tome ; Barna, D. ; Bartke, J. ; Barton, R.A. ; Behler, M. ; Betev, L. ; Bialkowska, H. ; Billmeier, A. ; Blume, C. ; Blyth, C.O. ; Boimska, B. ; Botje, M. ; Bracinik, J. ; Bramm, R. ; Brun, R. ; Buncic, P. ; Cerny, V. ; Cramer, J.G. ; Csato, P. ; Dinkelaker, P. ; Eckardt, V. ; Filip, P. ; Fischer, H.G. ; Fodor, Z. ; Foka, P. ; Freund, P. ; Friese, V. ; Gal, J. ; Gazdzicki, M. ; Georgopoulos, G. ; Gladysz, E. ; Hegyi, S. ; Hohne, C. ; Igo, G. ; Jones, P.G. ; Kadija, Krešo ; Karev, A. ; Kolesnikov, V.I. ; Kollegger, T. ; Kowalski, M. ; Kraus, I. ; Kreps, M. ; Levai, P. ; Malakhov, A.I. ; Margetis, S. ; Markert, C. ; Mayes, B.W. ; Melkumov, G.L. ; Mischke, A. ; Molnar, J. ; Nelson, J.M. ; Palla, G. ; Panagiotou, A.D. ; Perl, K. ; Petridis, A. ; Pikna, M. ; Pinsky, L. ; Puhlhofer, F. ; Reid, J.G. ; Renfordt, R. ; Retyk, W. ; Roland, C. ; Roland, G. ; Rybicki, A. ; Sammer, T. ; Sandoval, A. ; Sann, H. ; Schmitz, N. ; Seyboth, P. ; Sikler, F. ; Sitar, B. ; Skrzypczak, E. ; Squier, G.T.A. ; Stock, R. ; Strobele, H. ; Šuša, Tatjana ; Szentpetery, I. ; Sziklai, J. ; Trainor, T.A. ; Varga, D. ; Vassiliou, M. ; Veres, G.I. ; Vesztergombi, G. ; Vranić, Danilo ; Wenig, S. ; Wetzler, A. ; Whitten, C. ; Yoo, I.K. ; Zaranek, J. ; Zimanyi, J.
engleski
Energy Dependence of Pion and Kaon Production in Central Pb+Pb Collisions
Measurements of charged pion and kaon production in central Pb+Pb collisions at 40, 80 and 158 AGeV are presented. These are compared with data at lower and higher energies as well as with results from p+p interactions. The mean pion multiplicity per wounded nucleon increases approximately linearly with s_NN^1/4 with a change of slope starting in the region 15-40 AGeV. The change from pion suppression with respect to p+p interactions, as observed at low collision energies, to pion enhancement at high energies occurs at about 40 AGeV. A non-monotonic energy dependence of the ratio of K^+ to pi^+ yields is observed, with a maximum close to 40 AGeV and an indication of a nearly constant value at higher energies.The measured dependences may be related to an increase of the entropy production and a decrease of the strangeness to entropy ratio in central Pb+Pb collisions in the low SPS energy range, which is consistent with the hypothesis that a transient state of deconfined matter is created above these energies. Other interpretations of the data are also discussed.
pion; kaon; production; central PbPb collisions; NA49
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