Fri·May 10, 2024Friday·May 10, 2024

1. 01*

   Quasielastic Lepton-Nucleus Scattering and the Correlated Fermi Gas Model

   Bhubanjyoti Bhattacharya🇺🇸 · Sam Carey🇺🇸 · Erez O. Cohen🇮🇱 · Gil Paz🇺🇸

   The neutrino research program in the coming decades will require improved precision. A major source of uncertainty is the interaction of neutrinos with nuclei that serve as targets for such experiments. Broadly speaking, this interaction often depends, e.g., for charge-current quasi-elastic scattering, on the combination of ``nucleon physics", expressed by form factors, and ``nuclear physics", expressed by a nuclear model. It is important to get a good handle on both. We present a fully analytic implementation of the Correlated Fermi Gas Model for electron-nucleus and charge-current quasi-elastic neutrino-nucleus scattering. The implementation is used to compare separately form factors and nuclear model effects for both electron-carbon and neutrino-carbon scattering data.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2025)·2 citations
2. 02*

   Chiral Magnetic Effect in Heavy Ion Collisions: The Present and Future

   Dmitri E. Kharzeev🇺🇸 · Jinfeng Liao🇺🇸 · Prithwish Tribedy🇺🇸

   The chiral magnetic effect (CME) is a collective quantum phenomenon that arises from the interplay between gauge field topology and fermion chiral anomaly, encompassing a wide range of physical systems from semimetals to quark-gluon plasma. This review, with a focus on CME and related effects in heavy ion collisions, aims to provide an introductory discussion on its conceptual foundation and measurement methodology, a timely update on the present status in terms of experimental findings and theoretical progress, as well as an outlook into the open problems and future developments.

   ↳ nucl-thhep-lathep-phhep-th+1IJMPE(2024)·59 citations
3. 03*

   Electromagnetic observables of open-shell nuclei from coupled-cluster theory

   Francesca Bonaiti🇺🇸 · Sonia Bacca🇩🇪 · Gaute Hagen🇺🇸 · Gustav R. Jansen🇺🇸

   We develop a new method to describe electromagnetic observables of open-shell nuclei with two nucleons outside a closed shell. This approach combines the equation-of-motion coupled-cluster method for such systems and the Lorentz integral transform technique, expanding the applicability of coupled-cluster theory for these properties beyond closed-shell nuclei. To validate this new approach, we compute the non-energy-weighted dipole sum rule and the dipole polarizability of ${}^{16,24}$O in both the closed-shell and the new equation-of-motion coupled-cluster frameworks, finding agreement within error bars. We then analyze the evolution of the dipole polarizability along the oxygen and calcium isotopic chains. Our predictions agree well with available experimental data and other available theoretical calculations for the closed-shell ${}^{16,22}$O and the open-shell ${}^{18}$O. In the calcium isotopes, we observe that our dipole polarizability predictions for open-shell nuclei are lower than those of closed-shell nuclei. Our predictions for ${}^{24}$O and ${}^{54,56}$Ca will motivate future experimental studies at the dripline.

   ↳ nucl-thnucl-exPRC(2024)·23 citations
4. 04*

   In-medium changes of nucleon cross sections tested in neutrino-induced reactions

   B. Bogart🇺🇸 · K. Gallmeister🇩🇪 · U. Mosel🇩🇪

   Historically studied in the context of heavy-ion collisions, the extent to which free nucleon-nucleon cross sections are modified in-medium remains undetermined by these data sets. Therefore, we investigate the impact of NN in-medium modifications on neutrino-nucleus cross section predictions using the GiBUU transport model. We find that including an in-medium lowering of the NN cross section and density dependence on $\Delta$ excitation improves agreement with MicroBooNE neutrino-argon scattering data. This is observed for both proton and neutral pion spectra in charged-current muon neutrino and neutral-current single pion production datasets. The impact of collision broadening of the $\Delta$ resonance is also investigated. The absence of $\Delta$ broadening is slightly favored, but the larger uncertainties on the pion production data prevent definitive conclusions.

   ↳ hep-exhep-phnucl-exnucl-thPRC(2024)·10 citations
5. 05*

   Reconstruction of Bremsstrahlung $\gamma$-rays Spectrum in Heavy Ion Reactions with Richardson-Lucy Algorithm

   JunHuai Xu🇨🇳 · Yuhao Qin🇨🇳 · Zhi Qin🇨🇳 · Dawei Si🇨🇳 · Boyuan Zhang🇨🇳 · Yijie Wang🇨🇳 · Qinglin Niu🇨🇳 · Chang Xu🇨🇳 · Zhigang Xiao🇨🇳

   The high momentum tail (HMT) in the momentum distribution of nucleons above the Fermi surface has been regarded as an evidence of short-range correlations (SRCs) in atomic nuclei. It has been showcased recently that the $np$ Bremsstrahlung radiation in heavy ion reactions can be used to extract HMT information. The Richardson-Lucy (RL) algorithm is introduced to the reconstruction of the original Bremsstrahlung $\gamma$-ray energy spectrum from experimental measurements. By solving the inverse problem of the detector response to the $\gamma$-rays, the original energy spectrum of the Bremsstrahlung $\gamma$ in 25 MeV/u ${}^{86}$Kr + ${}^{124}$Sn has been reconstructed and compared to the isospin- and momentum-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) simulations. The analysis based on hypothesis test suggests the existence of the HMT of nucleons in nuclei, in accordance with the previous conclusions. With its effectiveness being demonstrated, it is feasible to apply the RL algorithm in future experiments of measuring the Bremsstrahlung $\gamma$-rays in heavy ion reactions.

   ↳ nucl-thnucl-exPLB(2024)·10 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.