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

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arxiv 0904.2708 v1 pith:NJ47ENNO submitted 2009-04-17 hep-ex

NA49 Collaboration: T. Anticic , B. Baatar , J. Bartke , L. Betev , H. Bia{l}kowska , C. Blume , B. Boimska , J. Bracinik
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V. Cerny O. Chvala J. Dolejsi V. Eckardt H. G. Fischer Z. Fodor P. Foka V. Friese M. Gaździcki C. Höhne K. Kadija A. Karev V. Kolesnikov M. Kowalski M. Kreps M. Makariev A. Malakhov M. Mateev G. Melkumov M. Mitrovski S. Mrówczyński R. Renfordt M. Rybczyński A. Rybicki A. Sandoval N. Schmitz P. Seyboth G. Stefanek R. Stock H. Ströbele T. Susa P. Szymanski V. Trubnikov D. Varga G. Vesztergombi D. Vranić S. Wenig Z. W{l}odarczyk A. Wojtaszek
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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.

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Cited by 2 Pith papers

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  1. Toward universal coalescence models for antideuteron production

    hep-ph 2026-03 conditional novelty 5.0 of 10

    Event-by-event coalescence models with a shared scale p_coal ≃ 0.2 GeV (or δ ≃ 1.7 fm) simultaneously fit ALICE pp (anti)deuteron spectra and ALEPH Z-decay antideuteron yields.

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    nucl-ex 2026-08 conditional novelty 4.0 of 10

    Comparing preliminary BM@N proton and deuteron directed flow with THESEUS shows good proton agreement and a slight deuteron overestimation, tentatively supporting thermodynamic light-nucleus formation.

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