https://doi.org/10.1140/epjc/s10052-009-1172-2
Regular Article - Experimental Physics
Inclusive production of protons, anti-protons and neutrons in p+p collisions at 158 GeV/c beam momentum
1
Comenius University, Bratislava, Slovakia
2
Eötvös Loránt University, Budapest, Hungary
3
KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary
4
H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
5
Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany
6
Joint Institute for Nuclear Research, Dubna, Russia
7
Fachbereich Physik der Universität, Frankfurt, Germany
8
CERN, Geneva, Switzerland
9
Institute of Physics Świętokrzyska Academy, Kielce, Poland
10
Max-Planck-Institut für Physik, Munich, Germany
11
Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Charles University, Prague, Czech Republic
12
Atomic Physics Department, Sofia University St. Kliment Ohridski, Sofia, Bulgaria
13
Institute for Nuclear Research and Nuclear Energy, BAS, Sofia, Bulgaria
14
Institute for Nuclear Studies, Warsaw, Poland
15
Rudjer Boskovic Institute, Zagreb, Croatia
* e-mail: Siegfried.Wenig@cern.ch
Received:
16
April
2009
Revised:
22
September
2009
Published online:
10
November
2009
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. p T 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.
© Springer-Verlag , 2010