K*(892)0 and K*(892)0 production in central Pb + Pb, Si + Si, C + C, and inelastic p + p collisions at 158A 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. Chvala, J. G. Cramer, V. Eckardt, Z. FodorP. Foka, V. Friese, M. Gadzicki, K. Grebieszkow, C. Höhne, K. Kadija, A. Karev, V. I. Kolesnikov, M. Kowalski, D. Kresan, A. Laszlo, R. Lacey, M. Van Leeuwen, M. MacKowiak, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, M. Mitrovski, S. 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

Production of the K*(892)0 and K*(892)0 resonances was studied via their K+π- and K-π+ decay modes in central Pb+Pb, Si+Si, C+C, and inelastic p+p collisions at 158A GeV(√sNN=17.3 GeV) with the NA49 detector at the CERN SPS. Transverse momentum and rapidity distributions were measured and total yields were estimated. The yield of K* exceeds that of K * by about a factor of two in nucleus-nucleus reactions. The total yield ratios K*/+ and * / - are strongly suppressed in central Pb+Pb compared to p+p, C+C, and Si+Si collisions, in agreement with the expected attenuation of these short-lived resonance states in the hadronic phase of the expanding fireball. The UrQMD model, although incorporating such a scenario, does not provide a quantitative description of the experimental results. The statistical hadron gas model assuming the same freeze-out parameters for stable hadrons and resonances overestimates the * / ratios in central Pb+Pb collisions by about a factor of 2.5.

Original languageEnglish
Article number064909
JournalPhysical Review C - Nuclear Physics
Volume84
Issue number6
DOIs
Publication statusPublished - Dec 13 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., Chvala, O., Cramer, J. G., Eckardt, V., ... Wojtaszek-Szwarc, A. (2011). K*(892)0 and K*(892)0 production in central Pb + Pb, Si + Si, C + C, and inelastic p + p collisions at 158A GeV. Physical Review C - Nuclear Physics, 84(6), [064909]. https://doi.org/10.1103/PhysRevC.84.064909