Proton-Λ correlations in central Pb+Pb collisions at √s NN=17.3 GeV

T. Anticic, B. Baatar, D. Barna, J. Bartke, H. Beck, L. Betev, H. Białkowska, C. Blume, M. Bogusz, B. Boimska, J. Book, M. Botje, P. Bunčić, T. Cetner, P. Christakoglou, P. Chung, O. Chvála, J. G. Cramer, V. Eckardt, Z. FodorP. Foka, V. Friese, M. Gaździcki, K. Grebieszkow, C. Höhne, K. Kadija, A. Karev, V. I. Kolesnikov, M. Kowalski, D. Kresan, A. László, R. Lacey, M. Van Leeuwen, M. MaćKowiak, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, M. Mitrovski, St Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, W. Peryt, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, E. Skrzypczak, M. Słodkowski, G. Stefanek, R. Stock, H. Ströbele, T. Susa, M. Szuba, M. Utvić, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, Z. Włodarczyk, A. Wojtaszek-Szwarc

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Abstract

The momentum correlation between protons and Λ particles emitted from central Pb+Pb collisions at √sNN=17.3 GeV was studied by the NA49 experiment at the CERN Super Proton Synchrotron. A clear enhancement is observed for small relative momenta (qinv<0.2 GeV). By fitting a theoretical model, which uses the strong interaction between the proton and the Λ 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 RG=3.02±0.20(stat.)-0.16+0. 44(syst.) fm.

Original languageEnglish
Article number054906
JournalPhysical Review C - Nuclear Physics
Volume83
Issue number5
DOIs
Publication statusPublished - May 16 2011

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Anticic, T., Baatar, B., Barna, D., Bartke, J., Beck, H., Betev, L., Białkowska, H., Blume, C., Bogusz, M., Boimska, B., Book, J., Botje, M., Bunčić, P., Cetner, T., Christakoglou, P., Chung, P., Chvála, O., Cramer, J. G., Eckardt, V., ... Wojtaszek-Szwarc, A. (2011). Proton-Λ correlations in central Pb+Pb collisions at √s NN=17.3 GeV. Physical Review C - Nuclear Physics, 83(5), [054906]. https://doi.org/10.1103/PhysRevC.83.054906