Fluctuation dynamics near the QCD critical point
Name
PhysRevC.102.054911.pdf
Description
Published version
Size
3.87 MB
Format
Adobe PDF
Checksum (MD5)
48b231be72a6b1a26efc85b6a1ab7c61
Author(s)
Du, Lipei
Heinz, Ulrich
Rajagopal, Krishna
Yin, Yi
Date Issued
2020
Journal
Physical Review C
Publisher
American Physical Society (APS)
Citation
Du, Lipei, Heinz, Ulrich, Rajagopal, Krishna and Yin, Yi. 2020. "Fluctuation dynamics near the QCD critical point." Physical Review C, 102 (5).
Version
Final published version
Abstract
© 2020 American Physical Society. The evolution of nonhydrodynamic slow processes near the QCD critical point is explored with the novel hydro+ framework, which extends the conventional hydrodynamic description by coupling it to additional explicitly evolving slow modes describing long wavelength fluctuations. Their slow relaxation is controlled by critical behavior of the correlation length and is independent from gradients of matter density and pressure that control the evolution of the hydrodynamic quantities. In this exploratory study, we follow the evolution of the slow modes on top of a simplified QCD matter background, allowing us to clearly distinguish and study, both separately and in combination, the main effects controlling the dynamics of critical slow modes. In particular, we show how the evolution of the slow modes depends on their wave number, the expansion of and advection by the fluid background, and the behavior of the correlation length. Nonequilibrium contributions from the slow modes to bulk matter properties that affect the bulk dynamics (entropy, pressure, temperature, and chemical potential) are discussed and found to be small.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PHYSREVC.102.054911
