Nuclear Theory·nucl-th

Monday·April 29, 2024

10 papers—4 primary·6 cross-listed

01
[Submitted on 25 Apr 2024]
Charged pion vortices in rotating systems
D. N. Voskresensky🇷🇺
Possibilities for formation of the charged pion field vortices in a rotating empty vessel (in vacuum) and in the rotating pion gas with a dynamically fixed particle number at zero temperature are studied within the $λ ∣ ϕ ∣^{4}$ model. It is shown that in the former case at a rapid rotation a supervortex of a charged pion field can be formed. Important role played by the electric field is demonstrated. Field configurations in presence and absence of the pion self-interaction are found. Conditions for formation of the vortex lattice at the rotation of the charged pion gas at zero temperature are studied. Observational effects are discussed.
Comments:
15 pages, reported on Sect. of Russ. Academy of Sci., 01.04-05.04, 2024. arXiv admin note: substantial text overlap with arXiv:2311.06804
Subjects:
Nuclear Theory (nucl-th); Quantum Gases (cond-mat.quant-gas); High Energy Physics — Phenomenology (hep-ph)
arXiv:
2404.16904 [pdf]
Phys.Part.Nucl.Lett.(2024)·6 citations
02
[Submitted on 26 Apr 2024]
TALYS calculation and a short review of the experimental status of proton capture studies on p-nuclei: A guide to future investigation
Indrani Ray · Argha Deb
TALYS calculations were performed to obtain the theoretical proton capture cross-sections on the p-nuclei. A short review on the status of related experimental studies was also conducted. Some basic properties such as Q-values, Coulomb barrier, Gamow peak, Gamow Window, and decay properties of the parent and daughter nuclei were studied. Various experimental parameters, e.g., beam energy, beam current, targets, and detectors, used in experimental investigations reported in the literature, were tabulated. The results of the TALYS calculations in the Gamow region were compared with the corresponding experimental values wherever available. This study is expected to facilitate the planning of future experiments.
Comments:
13 pages, 4 figures
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
2404.17240 [pdf]
CPC(2024)·0 citations
03
[Submitted on 26 Apr 2024]
Bayesian and Principal Component Analyses of Neutron Star Properties
N. K. Patra🇮🇳
A Bayesian method is used in this extensive work to generate a large set of minimally constrained equations of state (EOSs) for matters in neutron stars (NS). These EOSs are analyzed for their correlations with key NS properties, such as the tidal deformability, radius, and maximum mass, within the mass range of $1.2 - 2 M_{⊙}$ . The observed connections between the pressure of $β$ -equilibrated matter and the properties of neutron stars at different densities offer significant insights into the behavior of NS matter in a nearly model-independent manner. The study also examines the influence of various factors on the correlation of symmetry energy parameters, such as slope and curvature parameters at saturation density ( $ρ_{0} = 0.16 fm^{- 3}$ ) with the tidal deformability and radius of neutron stars. This study investigates the robustness of the observed correlations by considering the distributions and interdependence of symmetry energy parameters. Furthermore, the utilization of Principal Component Analysis (PCA) is employed to unveil the complicated relationship between various nuclear matter parameters and properties of neutron stars. This analysis highlights the importance of employing multivariate analysis techniques in order to comprehend the variety in tidal deformability and radius observed across distinct masses of NS. This comprehensive study aims to establish a connection between the parameters of nuclear matter and the properties of neutron stars, providing significant insights into the behavior of NS matter across different circumstances.
Comments:
PhD Thesis [Examiner:- Prof. Mariana Dutra ]
Subjects:
Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics — Phenomenology (hep-ph)
arXiv:
2404.17248 [pdf]
0 citations
04
[Submitted on 26 Apr 2024]
Global Data-Driven Determination of Baryon Transition Form Factors
Yu-Fei Wang🇩🇪 · Michael Döring🇺🇸 · Jackson Hergenrather🇺🇸 · Maxim Mai🇺🇸 · Terry Mart🇮🇩 · Ulf-G. Meißner🇩🇪 · Deborah Rönchen🇩🇪 · Ronald Workman (Jülich-Bonn-Washington Collaboration)🇺🇸
Hadronic resonances emerge from strong interactions encoding the dynamics of quarks and gluons. The structure of these resonances can be probed by virtual photons parameterized in transition form factors. In this study, twelve $N^{*}$ and $Δ$ transition form factors at the pole are extracted from data with the center-of-mass energy from $π N$ threshold to $1.8 GeV$ , and the photon virtuality $0 \leq Q^{2} / GeV^{2} \leq 8$ . For the first time, these results are determined from a simultaneous analysis of more than one state, i.e., $\sim 1 0^{5}$ $π N$ , $η N$ , and $K Λ$ electroproduction data. In addition, about $5 \cdot 1 0^{4}$ data in the hadronic sector as well as photoproduction serve as boundary conditions. For the $Δ (1232)$ and $N (1440)$ states our results are in qualitative agreement with previous studies, while the transition form factors at the poles of some higher excited states are estimated for the first time. Realistic uncertainties are determined by further exploring the parameter space.
Comments:
Text: 6 pages, 4 figures. Supplemental Material: 3 pages, 2 figures
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
arXiv:
2404.17444 [pdf]
PRL(2024)·19 citations

Affiliations

first authorsco-authorsvia INSPIRE

Charged pion vortices in rotating systems

TALYS calculation and a short review of the experimental status of proton capture studies on p-nuclei: A guide to future investigation

Bayesian and Principal Component Analyses of Neutron Star Properties

Global Data-Driven Determination of Baryon Transition Form Factors

Affiliations