Backward nucleons in p+A collisions can be produced by heavy baryonic resonances that undergo successive rescatterings with nuclear nucleons, a mechanism the authors support with analytic kinematics and UrQMD simulations.
Cumulative pion production via successive collisions in nuclear medium
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abstract
Production of pions in proton-nucleus (p+A) reactions outside of a kinematical boundary of proton-nucleon collisions, the so-called cumulative effect, is studied. The kinematical restrictions on pions emitted in backward direction in the target rest frame are analyzed. It is shown that cumulative pion production requires a presence of massive baryonic resonances that are produced during successive collisions of projectile with nuclear nucleons. After each successive collision the mass of created resonance may increase and, simultaneously, its longitudinal velocity decreases. Simulations within Ultra relativistic Quantum Molecular Dynamics model reveals that successive collisions of baryonic resonances with nuclear nucleons plays the dominant role in cumulative pion production in p+A reactions.
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Backward nucleon production by heavy baryonic resonances in proton-nucleus collisions
Backward nucleons in p+A collisions can be produced by heavy baryonic resonances that undergo successive rescatterings with nuclear nucleons, a mechanism the authors support with analytic kinematics and UrQMD simulations.