Collective Flow vs. Hard Processes in Relativistic Heavy Ion Collisions

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dc.creatorBurward-Hoy, J. M.
dc.creatorJacak, B. V.
dc.date2001-11-09
dc.date.accessioned2026-07-07T05:36:51Z
dc.date.available2026-07-07T05:36:51Z
dc.descriptionIn relativistic heavy ion collisions, the $p_T$ distributions of hadrons reflect the transverse motion generated during the collision and therefore the collision dynamics. The moderate $p_T$ values measured to date at $\sqrt{s} \approx $ 20 GeV/nucleon contain a mix of hard and soft processes. The available data from the SPS on $π$, K, p, and $Λ$ are used to constrain the magnitude of collective radial expansion. In $A+A$ collisions, the hydrodynamic distributions determined from the measured collective expansion are determined up to high $p_T$ and are consistent with the $π^{0}$ data. To cleanly observe hard processes, measurements at $p_T \ge 4$ GeV/c will be required. Pions produced in $p+W$ collisions clearly deviate from hydrodynamic distributions at $p_T > 2$ GeV/c, underscoring the differences in the physics between $p+A$ and $A+A$ collisions.
dc.identifierhttps://arxiv.org/abs/nucl-ex/0111005
dc.identifierhttp://arxiv.org/abs/nucl-ex/0111005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/81128
dc.subjectNuclear Experiment
dc.subjectHigh Energy Physics - Phenomenology
dc.titleCollective Flow vs. Hard Processes in Relativistic Heavy Ion Collisions
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