Flow Fluctuations from Early-Time Correlations in Nuclear Collisions

Understand

We propose that flow fluctuations have the same origin as transverse momentum fluctuations.

• The common source of these fluctuations is the spatially inhomogeneous initial state that drives hydrodynamic flow.
• Longitudinal correlations from an early Glasma stage followed by hydrodynamic flow quantitatively account for many features of multiplicity and $p_t$ fluctuation data.
• We develop a framework for studying flow and its fluctuations in this picture.