Hydrodynamic fluctuations near a critical endpoint and Hanbury Brown-Twiss interferometry

Abstract

The field of high energy nuclear collisions has witnessed a surge of interest in the role played by hydrodynamic fluctuations. Hydrodynamic fluctuations may have significant effects on matter created in heavy-ion accelerators whose trajectories in the plane of temperature versus chemical potential pass near a possible critical endpoint. We extend previous studies to explore the impact of these fluctuations on Hanbury Brown-Twiss interferometry of identical hadrons. With an appropriately defined correlation function we find that the fluctuations increase substantially when the trajectory passes near a critical endpoint, and also displays a damped oscillatory behavior in the rapidity distance $\Delta y$ unlike that originating from initial-state fluctuations.

8 pages, 3 figures

References in corpus (7)

• Super-horizon fluctuations and acoustic oscillations in relativistic heavy-ion collisions
• Thermal Conductivity and Chiral Critical Point in Heavy Ion Collisions
• Fitted HBT radii versus space-time variances in flow-dominated models
• Hydrodynamical noise and Gubser flow
• Equation of State and Phase Fluctuations near the Chiral Critical Point
• Pion freeze-out as seen through HBT correlations in heavy ion collisions from FAIR/AGS to RHIC energies
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