Springer LINK: The European Physical Journal A - Abstract Volume 2 Issue 4 (1998) pp 383-390

The European Physical Journal A

ISSN: 1434-6001 (printed version)
ISSN: 1434-601X (electronic version)

Table of Contents

Abstract Volume 2 Issue 4 (1998) pp 383-390

heavy ion physics: Spectator Nucleons in Pb+Pb Collisions at 158 A·GeV

H. Appelshäuser (7), J. Bächler (5), S.J. Bailey (16), L.S. Barnby (3), J. Bartke (6), R. A. Barton (3), H. Bialkowska (14), C.O. Blyth (3), R. Bock (7), C. Bormann (10), F.P. Brady (8), R. Brockmann (7) (g), N. Buncic (5)(10), P. Buncic (5)(10), H.L. Caines (3), D. Cebra (8), P. Chan (16), G.E. Cooper (2), J.G. Cramer (16)(13), P.B. Cramer (16), P. Csato (4), J. Dunn (8), V. Eckardt (13), F. Eckhardt (12), M.I. Ferguson (5), H.G. Fischer (5), D. Flierl (10), Z. Fodor (4), P. Foka (10), P. Freund (13), V. Friese (12), M. Fuchs (10), F. Gabler (10), J. Gal (4), M. Gazdzicki (10), E. Gladysz (6), P. Gorodetsky (6) (f), J. Grebieszkow (15), J. Günther (10), J.W. Harris (17), S. Hegyi (4), T. Henkel (12), L.A. Hill (3), I. Huang (2)(8), H. Hümmler (10), G. Igo (11), D. Irmscher (2)(7) (a), P. Jacobs (2), P.G. Jones (3), K. Kadija (18)(13), V.I. Kolesnikov (9), M. Kowalski (6), B. Lasiuk (11) (h), P. Lévai (4), A.I. Malakhov (9), S. Margetis (2) (c), C. Markert (7), G.L. Melkumov (9), A. Mock (13), J. Molnár (4), J.M. Nelson (3), G. Odyniec (2), G. Palla (4), A.D. Panagiotou (1), A. Petridis (1), A. Piper (12), R.J. Porter (2), A.M. Poskanzer (2) (b), S. Poziombka (10), D.J. Prindle (16), F. Pühlhofer (12), W. Rauch (13), J.G. Reid (16), R. Renfordt (10), W. Retyk (15), H.G. Ritter (2), D. Röhrich (10), C. Roland (7), G. Roland (10), H. Rudolph (2)(10), A. Rybicki (6), I. Sakrejda (2), A. Sandoval (7), H. Sann (7), A.Yu. Semenov (9), E. Schäfer (13), D. Schmischke (10), N. Schmitz (13), S. Schönfelder (13), P. Seyboth (13), J. Seyerlein (13), F. Sikler (4), E. Skrzypczak (15), G.T.A. Squier (3), R. Stock (5)(10), H. Ströbele (10), I. Szentpetery (4), J. Sziklai (4), M. Toy (2)(11), T.A. Trainor (16), S. Trentalange (11), T. Ullrich (17), M. Vassiliou (1), G. Vesztergombi (4), D. Vranic (7)(18), F. Wang (2), D.D. Weerasundara (16), S. Wenig (5), S. White (5) (e), C. Whitten (11), T. Wienold (2) (a), L. Wood (8), T.A. Yates (3), J. Zimanyi (4), X.-Z. Zhu (16), R. Zybert (3), NA49 Collaboration

(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: 16 February 1998 / Revised version: 30 March 1998

Abstact: The composition of forward-going projectile spectator matter in fixed-target Pb+Pb collisions at 158 A · GeV at the CERN SPS has been studied as a function of centrality. The data were measured with the NA49 veto calorimeter. We observe that forward-going spectator matter in central collisions consists of 9 neutrons, 7 protons, and half a deuteron on average. At large impact parameters most spectator nucleons are bound in fragments. The relative resolution of the average impact parameter derived from the measurement of spectator neutrons is roughly 19% in the range from zero to half maximum impact parameters.

PACS: 25.75.-q Relativistic heavy-ion collisions

(g) deceased
(f) Address: College de France, Paris, France
(a) Alexander von Humboldt Foundation (Lynen) Fellow
(h) Present address: Yale University, New Haven, CT, USA
(c) Present address: Kent State University, Kent, OH, USA
(b) Alexander von Humboldt Foundation U.S. Senior Scientist Award Recipient
(e) Address: Brookhaven National Laboratory, Upton, N.Y., U.S.A
(a) Alexander von Humboldt Foundation (Lynen) Fellow
Communicated by V. Metag

Article in PDF-Format (330 KB)

Present address: Physikalisches Institut, Universität Heidelberg, Germany