International Journal of Physics | Vol. 6, No. 5, May 2015 | pp. 33–40
DOI: 10.46882/2015/IJP/000061
Research Article
Title: Relativistic Hydrodynamic Evolution and Elliptic Flow Fluctuations in Asymmetric Deuteron-Gold Collisions
Names of Authors: S. C. O’Brien¹, A. O. Awosika²
Authors’ Affiliations: ¹School of Physics, University College Dublin, Dublin, Ireland; ²Department of Physics, University of Ibadan, Ibadan, Nigeria
Abstract: High-energy asymmetric collisions provide a unique experimental testing ground to study the spatial geometry limits required to form a droplet of quark-gluon plasma. This study presents a relativistic hydrodynamic modeling framework to simulate particle production cascades and evaluate elliptic flow fluctuations in deuteron-gold (d-Au) collisions at a center-of-mass energy of 200.0 GeV per nucleon pair. We utilized a 3+1 dimensional viscous hydrodynamic code coupled with a statistical hadronization module to compute transverse momentum spectra. The initial energy density profiles were generated using a Monte Carlo Glauber model to capture sub-nucleon scale configurations. The numerical simulations show that expanding systems build a substantial radial flow profile, shifting the mean transverse momentum of pions up to 0.75 GeV/c in high-multiplicity events. The calculated elliptic flow coefficient (v²) displays a strong mass-ordering effect, which matches experimental measurements gathered by the PHENIX detector within a ±5.5% margin. This close agreement suggests that small-scale systems generated in d-Au collisions can achieve brief hydrodynamic collective expansion. These findings help clarify the boundaries of fluid-like behavior in high-energy subatomic particle interactions.
Keywords: Relativistic hydrodynamics; particle production; deuteron-gold collisions; elliptic flow; Glauber model; statistical hadronization
Manuscript Timeline: Received: February 15, 2015; Revised: March 24, 2015; Accepted: April 12, 2015; Published: May 15, 2015
Citation: O’Brien, S. C., & Awosika, A. O. (2015). Relativistic Hydrodynamic Evolution and Elliptic Flow Fluctuations in Asymmetric Deuteron-Gold Collisions. International Journal of Physics, 6(5), 33–40.
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