Transverse momentum analysis of collective motion in relativistic nuclear collisions
P. Danielewicz, G. Odyniec (LBL)
TL;DR
This paper introduces a new transverse-momentum technique to analyze collective motion in relativistic nuclear collisions, revealing stronger effects than previous models but still weaker than hydrodynamical predictions.
Contribution
The paper presents a novel transverse-momentum analysis method that detects collective effects in nuclear collisions, improving upon previous sphericity tensor approaches.
Findings
Collective motion effects are observed in Ar+KCl collisions.
Effects are stronger than in the Cugnon cascade model.
Effects are weaker than in hydrodynamical models.
Abstract
Novel transverse-momentum technique is used to analyse charged-particle exclusive data for collective motion in the Ar+KCl reaction at 1.8 GeV/nucl. Previous analysis of this reaction, employing the standard sphericity tensor, revealed no significant effect. In the present analysis, collective effects are observed, and they are substantially stronger than in the Cugnon cascade model, but weaker than in the hydrodynamical model.
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