Two-proton correlations from 158 a GeV Pb + Pb central collisions

H. Appelshäuser, J. Bächler, S. J. Bailey, D. Barna, L. S. Barnby, J. Bartke, R. A. Barton, L. Betev, H. Bialoovska, A. Billmeier, C. O. Blyth, R. Bock, B. Boimska, C. Bormann, F. P. Brady, R. Brockmann, R. Brun, P. Bunčić, H. L. Caines, L. D. CarrD. Cebra, G. E. Cooper, J. 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, J. Gal, R. Ganz, M. Gaździcki, W. Geist, E. Gladyss, J. Grebieszkow, J. Günther, J. W. Harris, S. Hegyi, T. Henkel, L. A. Hill, H. Hummler, G. Igo, D. Irmscher, P. Jacobs, P. G. Jones, K. Kadija, V. I. Kolesnikov, M. Kowalski, B. Lasiuk, R. Lednicky, P. Lévai, 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, T. Susa, J. G. Reid, R. Renfordt, W. Retyk, H. G. Ritter, D. Röhrich, C. Roland, G. Roland, H. Rudolph, A. Rybicki, T. Sammer, A. Sandoval, H. Sann, A. Y. Semenov, E. Schäfer, D. Schmischke, N. Schmitz, S. Schönfelder, P. Seyboth, F. Sikler, E. Skrzypczak, R. Snellings, G. T.A. Squier, R. Stock, H. Ströbele, C. Struck, I. Szentpetery, J. Sziklai, M. Toy, T. A. Trainor, S. Trentalange, T. Ullrich, M. Vassiliou, G. Veres, G. Vesztergombi, S. Voloshin, D. Vranić, F. Wang, D. D. Weerasundara, S. Wenig, C. Whitten, L. Wood, N. Xu, T. A. Yates, J. Zimanyi, X. Z. Zhu, R. Zybert

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Abstract

The two-proton correlation function at midrapidity from Pb + Pb central collisions at 158 A GeV has been measured by the NA49 experiment. The results are compared to model predictions from static thermal Gaussian proton source distributions and transport models rqmd and venus. An effective proton source size is determined by minimizing X2/ndf between the correlation functions of the data and those calculated for the Gaussian sources, yielding σoff=3.85 ± 0.15(stat.)-0.250.60(syst.) fm. Both the rqmd and the venus model are consistent with the data within the error in the correlation peak region.

Original languageEnglish
Pages (from-to)21-28
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume467
Issue number1-2
DOIs
Publication statusPublished - Jan 1 1999

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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  • Cite this

    Appelshäuser, H., Bächler, J., Bailey, S. J., Barna, D., Barnby, L. S., Bartke, J., Barton, R. A., Betev, L., Bialoovska, H., Billmeier, A., Blyth, C. O., Bock, R., Boimska, B., Bormann, C., Brady, F. P., Brockmann, R., Brun, R., Bunčić, P., Caines, H. L., ... Zybert, R. (1999). Two-proton correlations from 158 a GeV Pb + Pb central collisions. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 467(1-2), 21-28. https://doi.org/10.1016/S0370-2693(99)01152-1