28 November 2022 to 2 December 2022
Europe/Zurich timezone

Exploring the criticality of QCD matter with effective field theory for fluctuating hydrodynamics

30 Nov 2022, 20:10
20m

Speaker

Noriyuki Sogabe (University of Illinois Chicago)

Description

Recently, a non-equilibrium effective field theory framework has been formulated for fluctuating hydrodynamics [1]. In this talk, we present an example of applying this novel formalism to study the critical properties of QCD. In the view that non-Gaussian fluctuations of baryon density are important for the QCD critical point search, we derive evolution equations for the critical non-Gaussian fluctuations of a conserved density and obtain closed-form solutions based on field theory techniques [2]. Those results can be readily implemented for simulations in realistic situations of heavy-ion collisions. In addition, we find that nonlinear interactions among noise fields, which are missing in traditional stochastic hydrodynamics, could potentially contribute to the quartic (fourth-order) fluctuations in the scaling regime in off-equilibrium situations.

[1] Michael Crossley, Paolo Glorioso, and Hong Liu, “Effective field theory of dissipative fluids,” JHEP 09, 095 (2017).
[2] Noriyuki Sogabe and Yi Yin, “Off-equilibrium non-Gaussian fluctuations near the QCD critical point: an effective field theory perspective,” JHEP 2022, 124 (2022).

Primary author

Dr Yi Yin (Institute of modern physics, Chinese Academy of Sciences)

Presentation materials