Fri·May 12, 2023Friday·May 12, 2023

1. 01*

   Elastic proton-neutron and antiproton-neutron scattering in holographic QCD

   Akira Watanabe🇨🇳 · Sayed Anwar Sirat🇨🇳 · Zhibo Liu🇨🇳

   The total and differential cross sections of the elastic proton-neutron and antiproton-neutron scattering are studied in a holographic QCD model, focusing on the Regge regime. Taking into account the Pomeron and Reggeon exchange, which are described by the Reggeized spin-2 glueball and vector meson propagator respectively, those cross sections are obtained. It is presented that the currently available experimental data of the total cross sections can be well described within the model. Once a single adjustable parameter is determined with the total cross section data, the differential cross sections can be calculated without any additional parameters. Although the available differential cross section data are limited, it is found that our predictions are consistent with those.

   ↳ hep-phhep-exnucl-exnucl-thEPJC(2023)·6 citations
2. 02*

   Measurement of ${\Xi }_c^{+}$ production in $p$Pb collisions at $\sqrt{s_{NN}}=8.16$ TeV at LHCb

   LHCb collaboration: R. Aaij · A.S.W. Abdelmotteleb · C. Abellan Beteta · F. Abudinén · T. Ackernley · B. Adeva · M. Adinolfi · P. Adlarson · H. Afsharnia · C. Agapopoulou · C.A. Aidala · Z. Ajaltouni and 1052 other authors

   A study of prompt ${\Xi }_c^{+}$ production in proton-lead collisions is performed with the LHCb experiment at a centre-of-mass energy per nucleon pair of 8.16 TeV in 2016 in $p$Pb and Pb$p$ collisions with an estimated integrated luminosity of approximately 12.5 and 17.4 nb${}^{-1}$, respectively. The ${\Xi }_c^{+}$ production cross-section, as well as the ${\Xi }_c^{+}$ to ${\Lambda }_c^{+}$ production cross-section ratio, are measured as a function of the transverse momentum and rapidity and compared to latest theory predictions. The forward-backward asymmetry is also measured as a function of the ${\Xi }_c^{+}$ transverse momentum.

   ↳ hep-exnucl-exPRC(2024)·17 citations
3. 03*

   How chiral forces shape neutron-rich Ne and Mg nuclei

   Andreas Ekström🇸🇪 · Christian Forssén🇸🇪 · G. Hagen🇺🇸 · G. R. Jansen🇺🇸 · T. Papenbrock🇺🇸 · Z. H. Sun

   We compute the structure of the exotic even nuclei ${}^{20-34}$Ne and ${}^{34-40}$Mg using interactions from chiral effective field theory (EFT). Our results for the ground-state rotational bands in ${}^{20-32}$Ne and ${}^{36-40}$Mg agree with data. We predict a well-deformed ${}^{34}$Ne and find that ${}^{40}$Mg exhibits an oblate deformed band close to the prolate ground-state, indicating the emergence of shape co-existence at the neutron dripline. A global sensitivity analysis shows that the subleading singlet $S$-wave contact and a pion-nucleon coupling strongly impact deformation in chiral EFT.

   ↳ nucl-thnucl-ex13 citations
4. 04*

   Updated analysis of near-threshold heavy quarkonium production for probe of proton's gluonic gravitational form factors

   Yuxun Guo🇺🇸 · Xiangdong Ji🇺🇸 · Yizhuang Liu🇵🇱 · Jinghong Yang🇺🇸

   There has been growing interest in the near-threshold production of heavy quarkonium which can access the gluonic structure in the nucleon. Previously we studied this process with quantum chromodynamics (QCD) and showed that it can be factorized with the gluon generalized parton distributions (GPDs) in the heavy quark limit. We further argued that the hadronic matrix element is dominated by its leading moments corresponding to the gluonic gravitational form factors (GFFs) in this limit. Since then, there have been many new developments on this subject. More experimental measurements have been made and published, and the lattice simulation of gluonic GFFs has been improved as well. In this work, we make an important revision to a previous result and perform an updated analysis with the new inputs. We also study the importance of the large momentum transfer to extract these gluonic structures reliably in this framework.

   ↳ hep-phhep-latnucl-exPRD(2023)·62 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.