Ξ and Ξ production in 158 GeV/nucleon Pb + Pb collisions

H. Appelshauser, J. Bächler, S. J. Bailey, D. Barna, L. S. Barnby, J. Bartke, R. A. Barton, H. Bialkovskk, A. Billmeier, C. O. Blyth, R. Bock, C. Bormann, F. P. Brady, R. Brockmann, R. Brun, P. Bunčić, H. L. Caines, L. D. Carr, D. Cebra, G. E. CooperJ. G. Cramer, M. Cristinziani, P. Csato, J. Dunn, V. Eckardt, F. Eckhardt, M. I. Ferguson, H. G. Fischer, D. Flierl, Z. Fodor, P. Foka, P. Freund, V. Friese, M. Fuchs, F. Gabler, R. Ganz, W. Geist, J. Gal, M. Gaździcki, E. Gladyss, J. Grebieszkow, J. Günther, J. W. Harris, S. Hegyi, T. Henkel, L. A. Hill, H. Hümmler, G. Igo, D. Irmscher, P. Jacobs, P. G. Jones, K. Kadija, V. I. Kolesnikov, A. Konashenok, M. Kowalski, B. Lasiuk, P. Lévai, F. Liu, A. I. Malakhov, S. Margetis, C. Markert, G. L. Melkumov, A. Mock, J. Molnár, J. M. Nelson, M. Oldenburg, G. Odyniec, G. Palla, A. D. Panagiotou, A. Petridis, A. Piper, R. J. Porter, A. M. Poskanzer, D. J. Prindle, F. Pühlhofer, W. Rauch, J. G. Reid, R. Renfordt, W. Retyk, H. G. Ritter, D. Rohrich, C. Roland, G. Roland, H. Rudolph, A. Rybicki, A. Sandoval, H. Sann, A. Y. Semenov, E. Schäfer, D. Schmischke, N. Schmitz, S. Schonfelder, P. Seyboth, J. Seyerlein, F. Sikler, E. Skrzypczak, R. Snellings, G. T.A. Squier, R. Stock, H. Ströbele, C. Struck, T. Susa, I. Szentpetery, J. Sziklai, M. Toy, T. A. Trainor, S. Trentalange, T. Ullrich, M. Vassiliou, G. Veres, G. Vesztergombi, D. Vranić, F. Wang, D. D. Weerasundara, S. Wenig, C. Whitten, T. Wienold, L. Wood, N. Xu, T. A. Yates, J. Zimanyi, X. Z. Zhu, R. Zybert

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Abstract

We report measurements of H and H+ hyperon absolute yields as a function of rapidity in 158 GeV/c Pb + Pb collisions. At midrapidity, dN/dy = 2.29 ± 0.12 for B-, and 0.52 ± 0.05 for H+, leading to the ratio of H+/H-= 0.23 ± 0.03. Inverse slope parameters fitted to the measured transverse mass spectra are of the order of T ≈ 300 MeV near mid-rapidity. The estimated total yield of H- particles in Pb + Pb central interactions amounts to 7.4 ± 1.0 per collision. Comparison to H- production in properly scaled p + p reactions at the same energy reveals a dramatic enhancement (about one order of magnitude) of H- production in Pb + Pb central collisions over elementary hadron interactions.

Original languageEnglish
Pages (from-to)523-530
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume444
Issue number3-4
DOIs
Publication statusPublished - Dec 24 1998

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Appelshauser, H., Bächler, J., Bailey, S. J., Barna, D., Barnby, L. S., Bartke, J., Barton, R. A., Bialkovskk, H., Billmeier, A., Blyth, C. O., Bock, R., Bormann, C., Brady, F. P., Brockmann, R., Brun, R., Bunčić, P., Caines, H. L., Carr, L. D., Cebra, D., ... Zybert, R. (1998). Ξ and Ξ production in 158 GeV/nucleon Pb + Pb collisions. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 444(3-4), 523-530. https://doi.org/10.1016/S0370-2693(98)01399-9