Analyzing the Power Spectrum of the Little Bangs

Abstract

In this talk we discuss the analogy between data from heavy-ion collisions and the Cosmic Microwave Background. We identify p_T correlations data as the heavy-ion analogy to the CMB and extract a power-spectrum from the heavy-ion data. We define the ratio of the final state power-spectrum to the initial coordinate-space eccentricity as the transfer-function. From the transfer-function we find that higher $n$ terms are suppressed and we argue that the suppression provides information on length scales like the mean-free-path. We make a rough estimate of the mean-free-path and find that it is larger than estimates based on the centrality dependence of v_2.

4 pages, talk given at Hard Probes 2010, Eilat, Israel

References in corpus (13)

• Glauber Modeling in High Energy Nuclear Collisions
• Triangular flow in event-by-event ideal hydrodynamics in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200A$ GeV
• The centrality dependence of elliptic flow, the hydrodynamic limit, and the viscosity of hot QCD
• Long Range Correlations and the Soft Ridge in Relativistic Nuclear Collisions
• Measuring Shear Viscosity Using Transverse Momentum Correlations in Relativistic Nuclear Collisions
• Phase transitions in the early and the present Universe
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• Super-horizon fluctuations and acoustic oscillations in relativistic heavy-ion collisions
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• Viscosity and the Soft Ridge at RHIC
• The Sound of the Little Bangs

Cited by in corpus (20)

• Collective flow and viscosity in relativistic heavy-ion collisions
• Relativistic Theory of Hydrodynamic Fluctuations with Applications to Heavy Ion Collisions
• Hydrodynamic event-plane correlations in Pb+Pb collisions at sqrt(s)=2.76ATeV
• Effects of magnetic field on the plasma evolution in relativistic heavy-ion collisions
• Fluid Dynamics and Viscosity in Strongly Correlated Fluids
• Shape and flow fluctuations in ultra-central Pb+Pb collisions at the LHC
• Higher Flow Harmonics in Heavy Ion Collisions from STAR
• Decomposition of fluctuating initial conditions and flow harmonics
• Matter-Antimatter Asymmetry in the Large Hadron Collider
• Morphology of High-Multiplicity Events in Heavy Ion Collisions
• Introductory Overview of Quark Matter 2012
• Gluonic Hot Spot Initial Conditions in Heavy-Ion Collisions
• Power spectrum of flow fluctuations in relativistic heavy-ion collisions
• Temperature fluctuations and Tsallis statistics in Relativistic Heavy Ion collisions
• Initial fluctuations and power spectrum of flow anisotropies in relativistic heavy-ion collisions
• Characterization of relativistic heavy-ion collisions at the Large Hadron Collider through temperature fluctuations
• Maps of the Little Bangs Through Energy Density and Temperature Fluctuations
• Calculation of Power Spectrum in the Little Bangs
• Highlights from Heavy Ion Collisions at RHIC and the Acoustics of the Little Bangs
• Hubble's Law in Heavy Ion Collisions