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Energy Dependence of $\Lambda$ and $\bar{\Lambda}$ Production at CERN-SPS Energies

Rapidity distributions for $\Lambda$ and $\bar{\Lambda}$ hyperons in central Pb-Pb collisions at 40, 80 and 158 A$\cdot$GeV and for ${\rm K}_{s}^{0}$ mesons at 158 A$\cdot$GeV are presented. The lambda multiplicities are studied as a function of collision energy together with AGS and RHIC measuremen...

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Detalles Bibliográficos
Autores principales: Mischke, A., Afanasiev, S.V., Anticic, T., Baatar, B., 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., Chvala, O., 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, K., Karev, A., Kolesnikov, V.I., Kollegger, T., Kowalski, M., Kraus, I., Kreps, M., van Leeuwen, M., Levai, P., Malakhov, A.I., Margetis, S., Markert, C., Mayes, B.W., Melkumov, G.L., Meurer, C., Mitrovski, M., Molnar, J., Nelson, John M., Palla, G., Panagiotou, A.D., Perl, K., Petridis, A., Pikna, M., Pinsky, Lawrence S., 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., Susa, T., Szentpetery, I., Sziklai, J., Trainor, T.A., Varga, D., Vassiliou, M., Veres, G.I., Vesztergombi, G., Vranic, D., Wenig, S., Wetzler, A., Whitten, C., Yoo, I.K., Zaranek, J., Zimanyi, J.
Lenguaje:eng
Publicado: 2002
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0375-9474(02)01433-1
http://cds.cern.ch/record/579162
Descripción
Sumario:Rapidity distributions for $\Lambda$ and $\bar{\Lambda}$ hyperons in central Pb-Pb collisions at 40, 80 and 158 A$\cdot$GeV and for ${\rm K}_{s}^{0}$ mesons at 158 A$\cdot$GeV are presented. The lambda multiplicities are studied as a function of collision energy together with AGS and RHIC measurements and compared to model predictions. A different energy dependence of the $\Lambda/\pi$ and $\bar{\Lambda}/\pi$ is observed. The $\bar{\Lambda}/\Lambda$ ratio shows a steep increase with collision energy. Evidence for a $\bar{\Lambda}/\bar{\rm p}$ ratio greater than 1 is found at 40 A$\cdot$GeV.