Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-03-05
Heavy Ion Phys. 17 (2003) 387-396
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 12 figures. To appear in the proceedings of International Workshop on Quark and Hadron Dynamics in Relativistic Heav
Scientific paper
10.1556/APH.17.2003.2-4.21
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 (\sqrt{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.
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