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Long Range Plan: Dense matter theory for heavy-ion collisions and neutron stars

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TLDR
The US nuclear community has an opportunity to capitalize on advances in astrophysical observations and nuclear experiments and engage in an interdisciplinary effort in the theory of dense baryonic matter that connects low and high-energy nuclear physics, astrophysics, gravitational waves physics, and data science as discussed by the authors .
Abstract
Since the release of the 2015 Long Range Plan in Nuclear Physics, major events have occurred that reshaped our understanding of quantum chromodynamics (QCD) and nuclear matter at large densities, in and out of equilibrium. The US nuclear community has an opportunity to capitalize on advances in astrophysical observations and nuclear experiments and engage in an interdisciplinary effort in the theory of dense baryonic matter that connects low- and high-energy nuclear physics, astrophysics, gravitational waves physics, and data science

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Breakdown of smooth solutions to the M\"uller-Israel-Stewart equations of relativistic viscous fluids.

TL;DR: In this article, the Muller-Israel-Stewart type of equations of relativistic viscous fluid with bulk viscosity in four-dimensional Minkowski space are considered and it is shown that in finite time such solutions develop a singularity or become unphysical.
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Chiral Restoration of Nucleons in Neutron Star Matter: Studies Based on a Parity Doublet Model

TL;DR: In this article , a model of linear realization of chiral symmetry with the nucleon parity doublet structure that permits the chiral invariant mass, m 0, for positive and negative parity nucleons, was considered.
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Searching for phase transitions in neutron stars with modified Gaussian processes

TL;DR: In this article , the authors extend Gaussian processes to include nontrivial features in the speed of sound, such as bumps, kinks, and plateaus, which are predicted by nuclear models with exotic degrees of freedom.
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Hydrodynamic attractors in ultrarelativistic nuclear collisions

TL;DR: In this paper , the idea of far-from-equilibrium hydrodynamic attractors was introduced as a way to understand how the complexity of initial states of nuclear matter is reduced so that a hydroynamic description can be effective.
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I and J

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Sediment Transport and Movable Bed s

TL;DR: In this article, sediment is either loaded as bed-load with particles sliding, saltating, and rolling over the river bed, or as a suspended-load, where particles move with the turbulent water flow away from the bed.
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Stars as Laboratories for Fundamental Physics: The Astrophysics of Neutrinos, Axions, and Other Weakly Interacting Particles

TL;DR: The Energy-Loss Argument of Neutrinos: Anomalous Stellar Energy Losses Bounded by Observations as mentioned in this paper is a well-known energy loss argument in physics.