Abstract
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.
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The NA49 Collaboration., Anticic, T., Baatar, B. et al. Inclusive production of protons, anti-protons and neutrons in p+p collisions at 158 GeV/c beam momentum. Eur. Phys. J. C 65, 9–63 (2010). https://doi.org/10.1140/epjc/s10052-009-1172-2
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DOI: https://doi.org/10.1140/epjc/s10052-009-1172-2
Keywords
- Transverse Momentum
- Neutron Yield
- Inelastic Cross Section
- Beam Momentum
- Double Differential Cross Section