Author
Agnieszka Sorensen
Other affiliations: Lawrence Berkeley National Laboratory
Bio: Agnieszka Sorensen is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Physics & Nuclear matter. The author has an hindex of 3, co-authored 8 publications receiving 18 citations. Previous affiliations of Agnieszka Sorensen include Lawrence Berkeley National Laboratory.
Papers
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University of North Carolina at Chapel Hill1, University of Nantes2, Ohio State University3, University of Connecticut4, McGill University5, University of Houston6, Indiana University7, Brookhaven National Laboratory8, Stony Brook University9, Lawrence Berkeley National Laboratory10, University of Illinois at Chicago11, North Carolina State University12, University of Illinois at Urbana–Champaign13, University of Washington14, University of Wuppertal15, Michigan State University16, Massachusetts Institute of Technology17, Wayne State University18, University of Minnesota19, University of Chicago20, University of California, Los Angeles21, Chinese Academy of Sciences22
TL;DR: The Beam Energy Scan Theory (BEST) Collaboration was formed with the goal of providing a theoretical framework for analyzing data from the BES program at the relativistic heavy ion collider (RHIC) at Brookhaven National Laboratory as mentioned in this paper.
36 citations
TL;DR: The Transport Model Evaluation Project (TMEP) as discussed by the authors has been pursued to test the robustness of transport model predictions in reaching consistent conclusions from the same type of physical model, and calculations under controlled conditions of physical input and set-up were performed with various participating codes.
33 citations
China National Nuclear Corporation1, Huzhou University2, Michigan State University3, Fudan University4, Ludwig Maximilian University of Munich5, Sun Yat-sen University6, Shanghai Jiao Tong University7, South China University of Technology8, GSI Helmholtz Centre for Heavy Ion Research9, Goethe University Frankfurt10, Ulsan National Institute of Science and Technology11, McGill University12, Pusan National University13, Texas A&M University–Commerce14, Variable Energy Cyclotron Centre15, Lawrence Berkeley National Laboratory16, University of Washington17, University of Giessen18, University of California, Los Angeles19, Beijing Normal University20
TL;DR: In this article, the mean-field response of heavy-ion collisions is examined in a transport model evaluation project (TMEP) for zero-sound propagation, and the results of several transport codes belonging to two families (BUU-like and QMD-like) are compared among each other.
Abstract: Within the transport model evaluation project (TMEP) of simulations for heavy-ion collisions, the mean-field response is examined here. Specifically, zero-sound propagation is considered for neutron-proton symmetric matter enclosed in a periodic box, at zero temperature and around normal density. The results of several transport codes belonging to two families (BUU-like and QMD-like) are compared among each other and to exact calculations. For BUU-like codes, employing the test particle method, the results depend on the combination of the number of test particles and the spread of the profile functions that weight integration over space. These parameters can be properly adapted to give a good reproduction of the analytical zero-sound features. QMD-like codes, using molecular dynamics methods, are characterized by large damping effects, attributable to the fluctuations inherent in their phase-space representation. Moreover, for a given nuclear effective interaction, they generally lead to slower density oscillations, as compared to BUU-like codes. The latter problem is mitigated in the more recent lattice formulation of some of the QMD codes. The significance of these results for the description of real heavy-ion collisions is discussed.
27 citations
TL;DR: In this article, a relativistically covariant parameterization of dense nuclear matter equation of state is developed for inclusion in computationally demanding hadronic transport simulations, showing that effects due to bulk thermodynamic behavior are reproduced in dynamic hadronic systems.
Abstract: We develop a flexible, relativistically covariant parameterization of dense nuclear matter equation of state suited for inclusion in computationally demanding hadronic transport simulations. Within an implementation in the hadronic transport code SMASH, we show that effects due to bulk thermodynamic behavior are reproduced in dynamic hadronic systems, demonstrating that hadronic transport can be used to study critical behavior in dense nuclear matter, both at and away from equilibrium. We also show that two-particle correlations calculated from hadronic transport simulation data follow theoretical expectations based on the second order cumulant ratio, and constitute a clear signature of crossing the phase diagram above the critical point.
19 citations
04 Nov 2022
TL;DR: 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
15 citations
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TL;DR: In this article , the authors use Bayesian inference to combine data from astrophysical multi-messenger observations of neutron stars and from heavy-ion collisions of gold nuclei at relativistic energies with microscopic nuclear theory calculations.
Abstract: Interpreting high-energy, astrophysical phenomena, such as supernova explosions or neutron-star collisions, requires a robust understanding of matter at supranuclear densities. However, our knowledge about dense matter explored in the cores of neutron stars remains limited. Fortunately, dense matter is not probed only in astrophysical observations, but also in terrestrial heavy-ion collision experiments. Here we use Bayesian inference to combine data from astrophysical multi-messenger observations of neutron stars1-9 and from heavy-ion collisions of gold nuclei at relativistic energies10,11 with microscopic nuclear theory calculations12-17 to improve our understanding of dense matter. We find that the inclusion of heavy-ion collision data indicates an increase in the pressure in dense matter relative to previous analyses, shifting neutron-star radii towards larger values, consistent with recent observations by the Neutron Star Interior Composition Explorer mission5-8,18. Our findings show that constraints from heavy-ion collision experiments show a remarkable consistency with multi-messenger observations and provide complementary information on nuclear matter at intermediate densities. This work combines nuclear theory, nuclear experiment and astrophysical observations, and shows how joint analyses can shed light on the properties of neutron-rich supranuclear matter over the density range probed in neutron stars.
59 citations
University of North Carolina at Chapel Hill1, University of Nantes2, Ohio State University3, University of Connecticut4, McGill University5, University of Houston6, Indiana University7, Stony Brook University8, Brookhaven National Laboratory9, Lawrence Berkeley National Laboratory10, University of Illinois at Chicago11, North Carolina State University12, University of Illinois at Urbana–Champaign13, University of Washington14, University of Wuppertal15, Michigan State University16, Massachusetts Institute of Technology17, Wayne State University18, University of Minnesota19, University of Chicago20, University of California, Los Angeles21, Chinese Academy of Sciences22
TL;DR: The Beam Energy Scan Theory (BEST) Collaboration was formed with the goal of providing a theoretical framework for analyzing data from the BES program at the relativistic heavy ion collider (RHIC) at Brookhaven National Laboratory as mentioned in this paper.
36 citations
01 Jan 2022
TL;DR: The Beam Energy Scan Theory (BEST) Collaboration was formed with the goal of providing a theoretical framework for analyzing data from the BES program at the relativistic heavy ion collider (RHIC) at Brookhaven National Laboratory as mentioned in this paper .
Abstract: The Beam Energy Scan Theory (BEST) Collaboration was formed with the goal of providing a theoretical framework for analyzing data from the Beam Energy Scan (BES) program at the relativistic heavy ion collider (RHIC) at Brookhaven National Laboratory. The physics goal of the BES program is the search for a conjectured QCD critical point as well as for manifestations of the chiral magnetic effect. We describe progress that has been made over the previous five years. This includes studies of the equation of state and equilibrium susceptibilities, the development of suitable initial state models, progress in constructing a hydrodynamic framework that includes fluctuations and anomalous transport effects, as well as the development of freezeout prescriptions and hadronic transport models. Finally, we address the challenge of integrating these components into a complete analysis framework. This document describes the collective effort of the BEST Collaboration and its collaborators around the world.
36 citations
TL;DR: The Transport Model Evaluation Project (TMEP) as discussed by the authors has been pursued to test the robustness of transport model predictions in reaching consistent conclusions from the same type of physical model, and calculations under controlled conditions of physical input and set-up were performed with various participating codes.
33 citations
China National Nuclear Corporation1, Huzhou University2, Michigan State University3, Fudan University4, Ludwig Maximilian University of Munich5, Sun Yat-sen University6, Shanghai Jiao Tong University7, South China University of Technology8, Goethe University Frankfurt9, GSI Helmholtz Centre for Heavy Ion Research10, Ulsan National Institute of Science and Technology11, McGill University12, Pusan National University13, Texas A&M University–Commerce14, Variable Energy Cyclotron Centre15, University of Washington16, Lawrence Berkeley National Laboratory17, University of Giessen18, University of California, Los Angeles19, Beijing Normal University20
TL;DR: In this article, the mean-field response of heavy-ion collisions is examined in a transport model evaluation project (TMEP) for zero-sound propagation, and the results of several transport codes belonging to two families (BUU-like and QMD-like) are compared among each other.
Abstract: Within the transport model evaluation project (TMEP) of simulations for heavy-ion collisions, the mean-field response is examined here. Specifically, zero-sound propagation is considered for neutron-proton symmetric matter enclosed in a periodic box, at zero temperature and around normal density. The results of several transport codes belonging to two families (BUU-like and QMD-like) are compared among each other and to exact calculations. For BUU-like codes, employing the test particle method, the results depend on the combination of the number of test particles and the spread of the profile functions that weight integration over space. These parameters can be properly adapted to give a good reproduction of the analytical zero-sound features. QMD-like codes, using molecular dynamics methods, are characterized by large damping effects, attributable to the fluctuations inherent in their phase-space representation. Moreover, for a given nuclear effective interaction, they generally lead to slower density oscillations, as compared to BUU-like codes. The latter problem is mitigated in the more recent lattice formulation of some of the QMD codes. The significance of these results for the description of real heavy-ion collisions is discussed.
27 citations