PaperPanorama
FAQ

Nuclear Theory·nucl-th

Friday·March 8, 2024

13 papers—8 primary·5 cross-listed

All13Primary8Cross-lists5
  1. 09

    Possible molecular states

    Bing Wu🇨🇳 · Xiang-Kun Dong🇩🇪 · Feng-Kun Guo🇨🇳 · Bing-Song Zou🇨🇳

    We investigate the possibility of deuteron-like bound states within the one-boson-exchange model and systematically analyze the effects of the contact-range potential, the tensor term from the vector-meson exchange, and nonlocal potentials due to the dependence on the sum of the initial and final state center-of-mass momenta. We find that the pion-exchange potential including the term and the tensor term of the -exchange potential exhibit comparable magnitudes but opposite signs for any -wave baryon-antibaryon systems. For the system, it is most likely to form bound states with mass around 3.7 GeV in the and channels.

    ↳ hep-phnucl-thPRD(2024)·3 citations
  2. 10

    Next-to-eikonal corrections to dijet production in Deep Inelastic Scattering in the dilute limit of the Color Glass Condensate

    Pedro Agostini🇵🇱 · Tolga Altinoluk🇵🇱 · Néstor Armesto🇪🇸

    We analyze the effects of next-to-eikonal corrections on dijet production in Deep Inelastic Scattering off nuclear targets in the framework of the Color Glass Condensate. They require the knowledge of correlators of fields in the target beyond those computed in the standard McLerran-Venugopalan model, specifically those between transverse and boost-enhanced components, and of the recoil of the fields. We neglect the latter, while for the former we develop a linear model valid for large nuclei. We considered the unpolarized cross sections for dijet production in the approximation of a homogenous dilute nucleus, obtaining simple analytic expressions for the cross sections at nex-to-eikonal accuracy, valid in the limit of total dijet momentum and dijet momentum imbalance larger than the saturation scale of the nucleus. We perform a numerical study of the results at energies of the Electron Ion Collider, finding effects in the cross sections at large total momentum. We also analyze the azimuthal asymmetries between total momentum and imbalance, finding that non-eikonal corrections induce odd azimuthal harmonics for the situation of jets with equal momentum fractions from the virtual photon, where they are absent in the eikonal approximation. Finally, in the eikonal approximation we have compared the results of our analytic expansion valid in the dilute limit of the target, and the full Color Glass Condensate results in the McLerran-Venugopalan model and their correlation limit. Our analytic expressions match the correlation limit ones in the region where both should be simultaneously valid and reproduce very well the full Color Glass Condensate results in its validity region.

    ↳ hep-phnucl-thJHEP(2024)·25 citations
  3. 11

    Invariant amplitudes, unpolarized cross sections, and polarization asymmetries in (anti)neutrino-nucleon elastic scattering

    Kaushik Borah🇺🇸 · Minerba Betancourt🇺🇸 · Richard J. Hill🇺🇸 · Thomas Junk🇺🇸 · Oleksandr Tomalak🇺🇸

    At leading order in weak and electromagnetic couplings, cross sections for (anti)neutrino-nucleon elastic scattering are determined by four nucleon form factors that depend on the momentum transfer . Including radiative corrections in the Standard Model and potential new physics contributions beyond the Standard Model, eight invariant amplitudes are possible, depending on both and the (anti)neutrino energy . We review the definition of these amplitudes and use them to compute both unpolarized and polarized observables including radiative corrections. We show that unpolarized accelerator neutrino cross-section measurements can probe new physics parameter space within the constraints inferred from precision beta decay measurements.

    ↳ hep-phhep-exnucl-exnucl-thPRD(2024)·9 citations
  4. 12

    Isomeric states of fission fragments explored via Penning trap mass spectrometry at IGISOL

    A. Jaries🇫🇮 · M. Stryjczyk🇫🇮 · A. Kankainen🇫🇮 · L. Al Ayoubi🇫🇮 · O. Beliuskina🇫🇮 · L. Canete🇫🇮 · R.P. de Groote🇫🇮 · C. Delafosse🇫🇮 · P. Delahaye🇫🇷 · T. Eronen🇫🇮 · M. Flayol🇫🇷 · Z. Ge🇩🇪 and 27 other authors

    The masses of Br, Mo, Pd, Ag, In, Sb and their respective isomeric states have been measured with the JYFLTRAP Penning trap mass spectrometer using the phase-imaging ion-cyclotron-resonance technique. The excitation energies of the isomeric states in Sb and Pd were experimentally determined for the first time, while for Br, Pd and In, the precision of the mass values was substantially improved. In Mo and Pd there were no signs of a long-lived isomeric state. The ground-state measurements of Pd and Ag indicated that both are significantly more bound than the literature values. For Ag, there was no indication of a proposed third long-lived state. The results for the nucleus Br and isomers close to doubly magic Sn have been compared to the shell-model and the microscopic quasiparticle-phonon model calculations.

    ↳ nucl-exnucl-thPRC(2024)·5 citations
  5. 13

    Stability and causality of rest frame modes in second-order spin hydrodynamics

    Asaad Daher🇵🇱 · Wojciech Florkowski🇵🇱 · Radoslaw Ryblewski🇵🇱 · Farid Taghinavaz🇮🇷

    We analyze the low- and high-momentum rest frame modes in the second-order spin hydrodynamics and check the asymptotic causality of the theory. A truncation scheme of the Israel-Stewart formalism derived in our earlier work is proposed that extends the minimal causal formulation. It consists of altogether 40 interconnected relaxation-type dynamical equations -- 16 (24) of them correspond to the independent components of the energy-momentum (spin) tensor. Similarly to previous studies, we find that the stability of the perturbations and asymptotic causality require using the spin equation of state that satisfies the generalized Frenkel condition demanding that the ``electric'' and ``magnetic'' components of the spin density tensor have opposite signs. For low-momentum modes this behavior is similar to that found earlier for the first-order (Navier-Stokes) spin hydrodynamics.

    ↳ hep-phmath-phmath.MPnucl-thPRD(2024)·24 citations

Affiliations

first authorsco-authorsvia INSPIRE