Inclusive production of protons, anti-protons and neutrons in p+p collisions at 158 GeV/c beam momentum

The European Physical Journal C

M. Mateev¹  A. Karev²  S. Wenig²  H. G. Fischer²  L. Betev²  M. Kreps³  J. Bracinik³  V. Cerny³  D. Varga⁴  C. Blume⁵  R. Renfordt⁵  M. Gaździcki⁵  R. Stock⁵  M. Mitrovski⁵  H. Ströbele⁵  O. Chvala⁶  J. Dolejsi⁶  D. Vranić⁷  V. Friese⁷  C. Höhne⁷  A. Sandoval⁷  P. Foka⁷  A. Rybicki⁸  M. Kowalski⁸  J. Bartke⁸  M. Makariev⁹  V. Trubnikov^1,10  H. Białkowska^1,10  B. Boimska^1,10  P. Szymanski^1,10  A. Wojtaszek^1,11  M. Rybczyński^1,11  S. Mrówczyński^1,11  Z. Włodarczyk^1,11  G. Stefanek^1,11  V. Kolesnikov^1,12  A. Malakhov^1,12  B. Baatar^1,12  G. Melkumov^1,12  Z. Fodor^1,13  G. Vesztergombi^1,13  N. Schmitz^1,14  P. Seyboth^1,14  V. Eckardt^1,14  T. Susa^1,15  K. Kadija^1,15  T. Anticic^1,15 

[1] Atomic Physics Department, Sofia University St. Kliment Ohridski, Sofia, Bulgaria;CERN, Geneva, Switzerland;Comenius University, Bratislava, Slovakia;Eötvös Loránt University, Budapest, Hungary;Fachbereich Physik der Universität, Frankfurt, Germany;Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Charles University, Prague, Czech Republic;Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany;H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland;Institute for Nuclear Research and Nuclear Energy, BAS, Sofia, Bulgaria;Institute for Nuclear Studies, Warsaw, Poland;Institute of Physics Świętokrzyska Academy, Kielce, Poland;Joint Institute for Nuclear Research, Dubna, Russia;KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary;Max-Planck-Institut für Physik, Munich, Germany;Rudjer Boskovic Institute, Zagreb, Croatia;

关键词: Transverse Momentum;    Neutron Yield;    Inelastic Cross Section;    Beam Momentum;    Double Differential Cross Section;   

DOI  :  10.1140/epjc/s10052-009-1172-2

来源: Springer

【 摘 要 】

New data on the production of protons, anti-protons and neutrons in p+p interactions are presented. The data come from a sample of 4.8 million inelastic events obtained with the NA49 detector at the CERN SPS at 158 GeV/c beam momentum. The charged baryons are identified by energy loss measurement in a large TPC tracking system. Neutrons are detected in a forward hadronic calorimeter. Inclusive invariant cross sections are obtained in intervals from 0 to 1.9 GeV/c (0 to 1.5 GeV/c) in transverse momentum and from −0.05 to 0.95 (−0.05 to 0.4) in Feynman x for protons (anti-protons), respectively. pT integrated neutron cross sections are given in the interval from 0.1 to 0.9 in Feynman x. The data are compared to a wide sample of existing results in the SPS and ISR energy ranges as well as to proton and neutron measurements from HERA and RHIC.

【 授权许可】

Unknown