DOI 10.1007/s100529800866
Hadronic expansion dynamics in central Pb+Pb
collisions
at 158 GeV per nucleon
NA49 Collaboration
H. Appelshäuser7 -
J. Bächler5 - S.J. Bailey16 - L.S. Barnby3 - J. Bartke6 -
R.A. Barton3 - H. Bia
kowska14 - A. Billmeier10 -
C.O. Blyth3 - R. Bock7 - C. Bormann10 - F.P. Brady8 -
R. Brockmann7 - R.Brun5 -
P. Buncic5,10 -
H.L. Caines3 - D. Cebra8 - G.E. Cooper2 -
J.G. Cramer16 - P. Csato4 -
J. Dunn8 -
V. Eckardt13 - F. Eckhardt12 -
M.I. Ferguson5 - D.Ferenc5 -
H.G. Fischer5 - D. Flierl10 - Z. Fodor4 -
P. Foka10 - P. Freund13 - V. Friese12 - M. Fuchs10 -
F. Gabler10 - J. Gal4 - M. Gazdzicki10 - E. Gladysz6 -
J. Grebieszkow15 - J. Günther10 - J.W. Harris17 -
S. Hegyi4 - T. Henkel12 - L.A. Hill3 -
I. Huang2,8 - H. Hümmler10 -
G. Igo11 -
D. Irmscher2,7 -
P. Jacobs2 - P.G. Jones3 -
K. Kadija18,13 - V.I. Kolesnikov9 - M. Kowalski6 -
B. Lasiuk11,17 - P. Lévai4
A.I. Malakhov9 - S. Margetis2 -
C. Markert7 - G.L. Melkumov9 -
A. Mock13 - J. Molnár4 -
J.M. Nelson3 - M. Oldenburg10 -
G. Odyniec2 -
G. Palla4 - A.D. Panagiotou1 - A. Petridis1 - A. Piper12 - R.J. Porter2 -
A.M. Poskanzer2 -
S. Poziombka10 - D.J. Prindle16 - F. Pühlhofer12 -
W. Rauch13 -
J.G. Reid16 - R. Renfordt10 - W. Retyk15 - H.G. Ritter2 -
D. Röhrich10 - C. Roland7 - G. Roland10 - H. Rudolph2,10 -
A. Rybicki6 -
A. Sandoval7 - H. Sann7 - A.Yu. Semenov9 -
E. Schäfer13 -
D. Schmischke10 - N. Schmitz13 - S. Schönfelder13 -
P. Seyboth13 - J. Seyerlein13 - F. Sikler4 - E. Skrzypczak15 -
G.T.A. Squier3 - R. Stock10 - H. Ströbele10 -
C. Struck12 -
I. Szentpetery4 - J. Sziklai4 -
M. Toy2,11 - T.A. Trainor16 - S. Trentalange11 -
T. Ullrich17 -
M. Vassiliou1 - G. Vesztergombi4 - D. Vranic5,18 - F. Wang2 -
D.D. Weerasundara16 - S. Wenig5 - C. Whitten11 -
T. Wienold2 -
L. Wood8 - T.A. Yates3 - N. Xu2 -
J. Zimanyi4 - X.-Z. Zhu16 - R. Zybert3
1 Department of Physics, University of Athens, Athens, Greece
2 Lawrence Berkeley National Laboratory, University of California, Berkeley, USA
3 Birmingham University, Birmingham, England
4 KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary
5 CERN, Geneva, Switzerland
6 Institute of Nuclear Physics, Cracow, Poland
7 Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany
8 University of California at Davis, Davis, USA
9 Joint Institute for Nuclear Research, Dubna, Russia
10 Fachbereich Physik der Universität, Frankfurt, Germany
11 University of California at Los Angeles, Los Angeles, USA
12 Fachbereich Physik der Universität, Marburg, Germany
13 Max-Planck-Institut für Physik, Munich, Germany
14 Institute for Nuclear Studies, Warsaw, Poland
15 Institute for Experimental Physics, University of Warsaw, Warsaw, Poland
16 Nuclear Physics Laboratory, University of Washington, Seattle, WA, USA
17 Yale University, New Haven, CT, USA
18 Rudjer Boskovic Institute, Zagreb, Croatia
Received: 25 November 1997 / Published online: 24 March 1998
Abstract
Two-particle correlation functions of negative hadrons over wide
phase space, and transverse mass spectra of negative hadrons and deuterons near
mid-rapidity have been measured in central Pb+Pb collisions at 158
GeV per nucleon by the NA49 experiment at the CERN SPS.
A novel Coulomb correction procedure for the negative two-particle
correlations is employed making use of the measured oppositely charged
particle correlation.
Within an expanding source scenario these results are used to extract
the dynamic characteristics of the hadronic source, resolving the ambiguities
between the temperature and transverse expansion velocity of the source,
that are unavoidable when single and two particle spectra are analysed
separately.
The source shape, the total duration of the source expansion, the duration
of particle emission,
the freeze-out temperature and the longitudinal and transverse expansion
velocities are deduced.
Copyright Springer-Verlag
