PaperPanorama
FAQ

Nuclear Theory·nucl-th

Thursday·September 7, 2023

9 papers—5 primary·4 cross-listed

All9Primary5Cross-lists4
  1. 06

    Nucleon axial-vector form factor and radius from future neutrino experiments

    Roberto Petti🇺🇸 · Richard J. Hill🇺🇸 · Oleksandr Tomalak🇺🇸

    Precision measurements of antineutrino elastic scattering on hydrogen from future neutrino experiments offer a unique opportunity to access the low-energy structure of protons and neutrons. We discuss the determination of the nucleon axial-vector form factor and radius from antineutrino interactions on hydrogen that can be collected at the future Long-Baseline Neutrino Facility, and study the sources of theoretical and experimental uncertainties. The projected accuracy would improve existing measurements by order of magnitude and be competitive with contemporary lattice-QCD determinations, potentially helping to resolve the corresponding tension with measurements from (anti)neutrino elastic scattering on deuterium. We find that the current knowledge of the nucleon vector form factors could be one of the dominant sources of uncertainty. We also evaluate the constraints that can be simultaneously obtained on the absolute flux normalization.

    ↳ hep-phhep-exnucl-exnucl-thPRD(2024)·18 citations
  2. 07

    Surprising charge-radius kink in the Sc isotopes at N=20

    Kristian König · Stephan Fritzsche · Gaute Hagen · Jason D. Holt · Andrew Klose · Jeremy Lantis · Yuan Liu · Kei Minamisono · Takayuki Miyagi · Witold Nazarewicz · Thomas Papenbrock · Skyy V. Pineda · Robert Powel · Paul-Gerhard Reinhard

    Charge radii of neutron deficient 40Sc and 41Sc nuclei were determined using collinear laser spectroscopy. With the new data, the chain of Sc charge radii extends below the neutron magic number N=20 and shows a pronounced kink, generally taken as a signature of a shell closure, but one notably absent in the neighboring Ca, K and Ar isotopic chains. Theoretical models that explain the trend at N=20 for the Ca isotopes cannot reproduce this puzzling behavior.

    ↳ nucl-exnucl-thPRL(2023)·32 citations
  3. 08

    Influence of dynamical screening of four-quarks interaction on the chiral phase diagram

    Michał Szymański🇵🇱 · Pok Man Lo🇵🇱 · Krzysztof Redlich🇵🇱 · Chihiro Sasaki🇵🇱

    We investigate the effect of screening of the four-quarks contact interactions by the ring diagram at finite temperature and density in an effective chiral model inspired by QCD in the Coulomb gauge. As a consequence, a medium-dependent coupling naturally emerges which, in a class of chiral models, brings the chiral crossover temperature down to the value calculated in LQCD at low net-baryon density. Furthermore, it implies a stronger divergence of the chiral susceptibility at the critical point compared to the mean-field dynamics. At vanishing temperature, however, the transition sets in at unphysically small chemical potential, indicating a need for additional effects to compensate for the screening strength. We discuss the properties of an effective potential for a class of models described by momentum-independent gap equations. In particular, we introduce the method to construct an approximate effective potential from the gap equations to determine the location of the first-order phase transition.

    ↳ hep-phnucl-thPRD(2024)·3 citations
  4. 09

    Magnetized Baryonic layer and a novel BPS bound in the gauged-Non-Linear-Sigma-Model-Maxwell theory in (3+1)-dimensions through Hamilton-Jacobi equation

    Fabrizio Canfora🇨🇱

    It is show that one can derive a novel BPS bound for the gauged Non-Linear-Sigma-Model (NLSM) Maxwell theory in (3+1) dimensions which can actually be saturated. Such novel bound is constructed using Hamilton-Jacobi equation from classical mechanics. The configurations saturating the bound represent Hadronic layers possessing both Baryonic charge and magnetic flux. However, unlike what happens in the more common situations, the topological charge which appears naturally in the BPS bound is a non-linear function of the Baryonic charge. This BPS bound can be saturated when the surface area of the layer is quantized. The far-reaching implications of these results are discussed. In particular, we determine the exact relation between the magnetic flux and the Baryonic charge as well as the critical value of the Baryonic chemical potential beyond which these configurations become thermodynamically unstable.

    ↳ hep-thastro-ph.HEcond-mat.supr-conhep-ph+1JHEP(2023)·18 citations

Affiliations

first authorsco-authorsvia INSPIRE