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Nuclear Theory·nucl-th

Monday·June 20, 2022

5 papers—2 primary·3 cross-listed

All5Primary2Cross-lists3
  1. 01

    Exploring universal characteristics of neutron star matter with relativistic \textit{ab initio} equations of state

    Sibo Wang🇨🇳 · Chencan Wang🇨🇳 · Hui Tong🇨🇳

    Starting from the relativistic realistic nucleon-nucleon () interactions, a newly developed relativistic \textit{ab initio} method, i.e., the relativistic Brueckner-Hartree-Fock (RBHF) theory in the full Dirac space is employed to study the neutron star properties. First, the one-to-one correspondence relation for gravitational redshift and mass is established and used to infer the mass of isolated neutron stars combining the gravitational redshift measurements. Next, the ratio of the moment of inertia to as a function of the compactness is obtained, which is consistent with the universal relations in the literature. The moment of inertia for pulsar PSR J0737-3039A is predicted to be 1.356, 1.381, and by the RBHF theory in the full Dirac space with interactions Bonn A, B, and C, respectively. Finally, the quadrupole moment of neutron star is calculated under the slow-rotation and small-tidal-deformation approximation. The equation of states constructed by the RBHF theory in the full Dirac space, together with those by the projection method and momentum-independence approximation, conform to universal -Love- relations as well. By combing the tidal deformability from GW170817 and the universal relations from relativistic \textit{ab initio} methods, the moment of inertia of neutron star with 1.4 solar mass is also deduced as .

    nucl-thPRC(2022)·19 citations
  2. 02

    Testing chiral unitary models for the in photoproduction

    P. C. Bruns🇨🇿 · A. Cieplý🇨🇿 · M. Mai🇩🇪

    We adopt a novel formalism for the low-energy analysis of the photoproduction reaction to calculate the invariant mass distributions in the resonance region. The approach adheres to constraints arising from unitarity, gauge invariance and chiral perturbation theory, and is used without adjusting any model parameters. It is found that the meson-baryon rescattering in the final state has a major impact on the magnitude and structure of the generated spectra that are compared with the experimental data from the CLAS collaboration. We demonstrate a large sensitivity of the theoretical predictions to the choice of the coupled-channel model amplitudes which should enable one to constrain the parameter space of these models.

    nucl-thhep-ph2 citations
  3. 03

    Masses of Single, Double and Triple Heavy baryons in the Hyper-Central Quark Model by Using GF-AEIM

    M. Abu-shady🇪🇬 · H. M. Fath-Allah🇪🇬

    In this paper, we calculate single, double and triple heavy baryons masses using hyper-central approach in the two cases. The first case, considering potential is a combination of Coulombic, linear confining and harmonic oscillator terms. The second case, we add the hyperfine interaction. The hyper-radial Schrodinger equation in the two cases is solved to obtain energy eigenvalues and the baryonic wave function by using the generalized fractional analytical iteration method (GF-AEIM). The present results are a good agreement with experimental data and are improved with other recent works.

    ↳ hep-phnucl-thAdv.High Energy Phys.(2022)·6 citations
  4. 04

    Quantum computation of nuclear observables involving linear combination of unitary operators

    Pooja Siwach🇺🇸 · P. Arumugam🇮🇳

    We present the quantum computation of nuclear observables where the operators of interest are first decomposed in terms of the linear combination of unitaries. Then we utilise the Hadamard test and the linear combination of unitaries (LCU) based methods to compute the expectation values. We apply these methods to calculate the electric quadrupole moment of deuteron. The results are compared for the Jordan-Wigner transformation and Gray code encoding. We discuss the versatility of our approach that can be utilized in general to calculate several observables on a quantum computer.

    ↳ quant-phnucl-thPRC(2022)·24 citations
  5. 05

    Inelastic nuclear scattering from neutrinos and dark matter

    Bhaskar Dutta🇺🇸 · Wei-Chih Huang🇺🇸 · Jayden L. Newstead🇦🇺 · Vishvas Pandey🇺🇸

    Neutrinos with energy of order 10~MeV, such as from pion decay-at-rest sources, are an invaluable tool for studying low-energy neutrino interactions with nuclei -- previously enabling the first measurement of coherent elastic neutrino-nucleus scattering. Beyond elastic scattering, neutrinos and dark matter in this energy range also excite nuclei to its low-lying nuclear states, providing an additional physics channel. Here, we consider neutral-current inelastic neutrino-nucleus and dark matter(DM)-nucleus scattering off Ar, Cs, and I nuclei that are relevant to a number of low-threshold neutrino experiments at pion decay-at-rest facilities. We carry out large scale nuclear shell model calculations of the inelastic cross sections considering the full set of electroweak multipole operators. Our results demonstrate that Gamow-Teller transitions provide the dominant contribution to the cross section and that the long-wavelength limit provides a reasonable approximation to the total cross section for neutrino sources. We show that future experiments will be sensitive to this channel and thus these results provide additional neutrino and DM scattering channels to explore at pion decay-at-rest facilities.

    ↳ hep-phnucl-thPRD(2022)·20 citations

Affiliations

first authorsco-authorsvia INSPIRE