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Nuclear Theory·nucl-th

Friday·October 1, 2021

13 papers—5 primary·8 cross-listed

All13Primary5Cross-lists8
  1. 01

    Solar neutrinos and the primordial Sun

    W. C. Haxton🇺🇸

    I discuss the possibility that the large-scale segregation of metals that accompanied planet formation might have left an imprint on the composition of the primordial Sun. Motivated in part by recent Borexino measurements of CN solar neutrinos, I stress how the additional linear metallicity dependence of this flux could be exploited to constrain the composition of the solar core. The gas in the core is arguably the earliest preserved sample of the material out of which our solar system formed.

    nucl-thInnovations Platform 7, 52 (2021)·0 citations
  2. 02

    Decorrelation of participant and spectator angular momenta in heavy-ion collisions

    Joseph R. Adams🇺🇸 · Michael A. Lisa🇺🇸

    High-energy heavy-ion collisions contain enormous angular momentum, , which is in the range of collision energy, , spanned experimentally by the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). A fraction of is transferred to the overlapping collision region, which is indispensable for measuring observables such as vorticity-driven hadron spin alignment with . Experiments estimate the orientation of of the participant nucleons within the collision overlap region, , by using that of the forward- and backward-going spectating nucleons . Using two models, we study the decorrelation between and , driven both by angular-momentum conservation and event-by-event fluctuations, as well as by the decorrelation between the orientation of the elliptic overlap region and the . -dependent decorrelation is observed in both of these cases and is large enough to be an important corrective factor used when experimentally observing phenomena driven by .

    nucl-thPRC(2022)·4 citations
  3. 03

    The effect of charge, isospin, and strangeness in the QCD phase diagram critical end point

    Krishna Aryal🇺🇸 · Constantinos Constantinou🇮🇹 · Ricardo L.S. Farias🇧🇷 · Veronica Dexheimer🇺🇸

    In this work, we discuss the deconfinement phase transition to quark matter in hot/dense matter. We {examine} the effect that different charge fractions, isospin fractions, net strangeness, and chemical equilibrium with respect to leptons have on the position of the coexistence line between different phases. In particular, we investigate how different sets of conditions that describe matter in neutron stars and their mergers, or matter created in heavy-ion collisions affect the position of the critical end point, namely where the first-order phase transition becomes a crossover. We also present an introduction to the topic of critical points, including a review of recent {advances} concerning QCD critical points.

    nucl-thastro-ph.HEhep-thUniverse(2021)·8 citations
  4. 04

    Early time behavior of spatial and momentum anisotropies in a kinetic approach to nuclear collisions

    Marc Borrell🇩🇪 · Nicolas Borghini🇩🇪

    We derive a general formula for the early time dependence of a phase space distribution evolving according to the kinetic Boltzmann equation. Assuming that the early evolution of the system created in high-energy nuclear collisions can be described by kinetic theory, we calculate the scaling behaviors for the onset of various characteristics of the transverse dynamics. In particular, we show that the scaling behavior of the anisotropic flow coefficients at early times does not depend on the details of the collision kernel or the system composition, while at the same time it differs from the prediction of fluid dynamics.

    nucl-thhep-phEPJC(2022)·9 citations
  5. 05

    Spin Polarization Formula for Dirac Fermions at Local Equilibrium

    Yu-Chen Liu🇨🇳 · Xu-Guang Huang🇨🇳

    We derive a Cooper-Frye type spin polarization formula for Dirac fermions at local thermal equilibrium described by a grand canonical ensemble specified by temperature, fluid velocity, chemical potential, and spin potential. We discuss the physical meaning of different contributions to spin polarization and compare them with previous works. The present formula provides machinery to convert the spin potential computed in, e.g., relativistic spin hydrodynamics to the spin polarization observable in, e.g., heavy-ion collisions.

    nucl-thhep-phnucl-exSCPMA(2022)·46 citations

Affiliations

first authorsco-authorsvia INSPIRE