Baryon number transfer in hadron + nucleus and nucleus + nucleus collisions: A link between elementary and complex interactions

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The baryon number transfer is studied in elementary and complex hadronic interactions at the CERN experiment NA49 at the SPS, at 158 AGeV beam energy (√s = 17.2 GeV). A two-component picture is proposed, which builds up the net proton distribution from a target and a projectile component. Using pion beam, the projectile component is experimentally determined for p + p and p + A interactions. A similar stopping behaviour of the projectile component is found for p + A and A + A interactions. Based on these observations, the baryon transfer is assumed to provide a common scale of inelasticity in p + p, p + A and A + A interactions. A model-independent way is proposed to predict the pion multiplicity in A + A.

Original languageEnglish
Pages (from-to)387-396
Number of pages10
JournalActa Physica Hungarica New Series Heavy Ion Physics
Issue number2-4
Publication statusPublished - Sep 9 2003



  • Baryon transfer
  • Multiplicity
  • Two-component picture

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy(all)

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