Proton - Lambda Correlations in Central Pb+Pb Collisions at $\sqrt{s_{NN}}$ = 17.3 GeV

The momentum correlation between protons and lambda particles emitted from central Pb+Pb collisions at sqrt(s_{NN}) = 17.3 GeV was studied by the NA49 experiment at the CERN SPS. A clear enhancement is observed for small relative momenta (q_{inv} < 0.2 GeV). By fitting a theoretical model, which...

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Detalles Bibliográficos
Autores principales: Anticic, T., Baatar, B., Barna, D., Bartke, J., Beck, H., Betev, L., Bialkowska, H., Blume, C., Bogusz, M., Boimska, B., Book, J., Botje, M., Buncic, P., Cetner, T., Christakoglou, P., Chung, P., Chvala, O., Cramer, J.G., Eckardt, V., Fodor, Z., Foka, P., Friese, V., Gazdzicki, M., Grebieszkow, K., Hohne, C., Kadija, K., Karev, A., Kolesnikov, V.I., Kowalski, M., Kresan, D., Laszlo, A., Lacey, R., van Leeuwen, M., Mackowiak, M., Makariev, M., Malakhov, A.I., Mateev, M., Melkumov, G.L., Mitrovski, M., Mrowczynski, St., Nicolic, V., Palla, G., Panagiotou, A.D., Peryt, W., Pluta, J., Prindle, D., Puhlhofer, F., Renfordt, R., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Schmitz, N., Schuster, T., Seyboth, P., Sikler, F., Skrzypczak, E., Slodkowski, M., Stefanek, G., Stock, R., Strobele, H., Susa, T., Szuba, M., Utvic, M., Varga, D., Vassiliou, M., Veres, G.I., Vesztergombi, G., Vranic, D., Wlodarczyk, Z., Wojtaszek-Szwarc, A.
Lenguaje:eng
Publicado: 2011
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.83.054906
http://cds.cern.ch/record/1333952
Descripción
Sumario:The momentum correlation between protons and lambda particles emitted from central Pb+Pb collisions at sqrt(s_{NN}) = 17.3 GeV was studied by the NA49 experiment at the CERN SPS. A clear enhancement is observed for small relative momenta (q_{inv} < 0.2 GeV). By fitting a theoretical model, which uses the strong interaction between the proton and the lambda in a given pair, to the measured data a value for the effective source size is deduced. Assuming a static Gaussian source distribution we derive an effective radius parameter of R_G = 3.02 \pm 0.20$(stat.)^{+0.44}_{-0.16}(syst.) fm.

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