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Nuclear Theory·nucl-th

Thursday·August 24, 2023

7 papers—3 primary·4 cross-listed

All7Primary3Cross-lists4
  1. 01

    Effects of Quasiparticle-Vibration Coupling on Gamow-Teller Strength and Decay with the Skyrme Proton-Neutron Finite-Amplitude Method

    Qunqun Liu · Jonathan Engel · Nobuo Hinohara · Markus Kortelainen

    We adapt the proton-neutron finite-amplitude method, which in its original form is an efficient implementation of the Skyrme quasiparticle random phase approximation, to include the coupling of quasiparticles to like-particle phonons. The approach allows us to add beyond-QRPA correlations to computations of Gamow-Teller strength and -decay rates in deformed nuclei for the first time. We test the approach in several deformed isotopes for which measured strength distributions are available. The additional correlations dramatically improve agreement with the data, and will lead to improved global -decay rates.

    nucl-thPRC(2024)·11 citations
  2. 02

    Expanding proton dripline by employing a number of muons

    Lang Liu · Yongle Yu

    Through mean-field calculations, we demonstrate that, in a large nucleus binding multiple muons, these heavy leptons localize within a few dozen femtometers of the nucleus. The mutual Coulomb interactions between the muons and the protons can lead to a substantial decrease in proton chemical potential, surpassing 1 MeV. These findings allow for expanding the proton-dripline on the nuclear chart in principle, suggesting the possible production of nuclei with Z around 120.

    nucl-thhep-phCPC(2023)·0 citations
  3. 03

    Deciphering capture events in light emulsion nuclei

    Eliahu Friedman🇮🇱 · Avraham Gal🇮🇱

    We recently showed that all five KEK and J-PARC uniquely assigned two-body +ZZ'+Z'' capture events in CNO light emulsion nuclei are consistent with Coulomb-assisted nuclear states in a -nuclear potential of nuclear-matter depth MeV [1]. Here we argue that the recently reported N capture events named KINKA and IRRAWADDY are more likely --C nuclear states [2] than --N states, the latter assignment implying considerably smaller values of .

    nucl-thhep-phnucl-exEPJ Web Conf.(2024)·2 citations
  4. 04

    Measures of azimuthal anisotropy in high-energy collisions

    Jean-Yves Ollitrault🇫🇷

    Azimuthal anisotropy is a key observation made in ultrarelativistic heavy-ion collisions. This phenomenon has played a crucial role in the development of the field over the last two decades. In addition to its interest for studying the quark-gluon plasma, which was the original motivation, it is sensitive to the properties of incoming nuclei, in particular to the nuclear deformation and to the nuclear skin. The azimuthal anisotropy is therefore of crucial importance when relating low-energy nuclear structure to high-energy nuclear collisions. This article is an elementary introduction to the various observables used in order to characterize azimuthal anisotropy, which go under the names of , , , etc. The intended audience is primarily physicists working in the field of nuclear structure.

    ↳ nucl-exhep-exhep-phnucl-thEPJA(2023)·34 citations
  5. 05

    Relativistic Hydrodynamics under Rotation: Prospects & Limitations from a Holographic Perspective

    Markus A. G. Amano🇨🇳 · Casey Cartwright🇳🇱 · Matthias Kaminski🇺🇸 · Jackson Wu🇺🇸

    The AdS/CFT correspondence, or holography, has provided numerous important insights into the behavior of strongly-coupled many-body systems. Crucially, it has provided a testing ground for the construction of new effective field theories, especially those in the low frequency, long wavelength limit known as hydrodynamics. We review the study of strongly-coupled rotating fluids using holography, and we examine the hydrodynamics emerging from the study of rotating Myers-Perry black holes. We discuss three regimes in which holographic rotating fluids display either (1) hydrodynamic behavior of a boosted fluid, (2) hydrodynamic behavior distinct from a boosted fluid, or (3) no obvious hydrodynamic behavior. We describe techniques to obtain hydrodynamic and non-hydrodynamic modes, and we compute the radius of convergence for the hydrodynamic regimes. The limitations of hydrodynamics under rotation are discussed alongside our findings.

    ↳ hep-thgr-qchep-phnucl-ex+1PPNP(2024)·12 citations
  6. 06

    The McDIPPER: A novel saturation-based 3+1D initial state model for Heavy Ion Collisions

    Oscar Garcia-Montero🇩🇪 · Hannah Elfner🇩🇪 · Sören Schlichting🇩🇪

    We present a new 3D resolved model for the initial state of ultrarelativistic heavy-ion collisions, based on the -factorized Color Glass Condensate hybrid approach. The McDIPPER framework responds to the need for a rapidity-resolved initial-state Monte Carlo event generator which can deposit the relevant conserved charges (energy, charge and baryon densities) both in the midrapidity and forward/backward regions of the collision. This event-by-event generator computes the gluon and (anti-) quark phase-space densities using the IP-Sat model, from where the relevant conserved charges can be computed directly. In the present work we have included the leading order contributions to the light flavor parton densities. As a feature, the model can be systematically improved in the future by adding next-to-leading order calculations (in the CGC hybrid framework), and extended to lower energies by including sub-eikonal corrections the channels included. We present relevant observables, such as the eccentricities and flow decorrelation, as tests of this new approach.

    ↳ hep-phnucl-thPRC(2024)·41 citations
  7. 07

    The Yukawa potential under weak magnetic field

    Fabio L. Braghin🇧🇷 · Marcelo Loewe🇨🇱 · Cristian Villavicencio🇨🇱

    Weak magnetic field induced corrections for the Yukawa potential due to one pion exchange between two constituent quarks (nucleons) are presented. For that, the constant magnetic field effect on the pion propagator and on the pion form factor are taken into account. An effective gluon propagator parameterized with an effective gluon mass (\,GeV) is considered. In the limit of magnetic field weak with respect to the constituent quark mass and pion mass, analytical and semi-analytical expressions can be obtained. Different types of contributions are found, isotropic or anisotropic, dependent on the pion mass and also on the constituent quark and effective gluon masses. Overall the corrections are of the order of to of the Yukawa potential at distances close to fm, and they decrease slower than the Yukawa potential. The anistropic corrections are considerably smaller than the isotropic components. A sizable splitting between results due to magnetic field dependent neutral or charged pion mass is found.

    ↳ hep-phnucl-thPRD(2024)·6 citations

Affiliations

first authorsco-authorsvia INSPIRE