Wed·Jan 12, 2022Wednesday·January 12, 2022

1. 01*

   Energy Dependence of Strangeness Production in Heavy-ion Collision

   Md Nasim🇮🇳

   An experimental overview of the energy dependence of strangeness production is presented. The strange hadrons are considered a good probe to study the QCD matter created in relativistic nucleus-nucleus collisions. The heavy-ion experiments at SPS, RHIC, and LHC have recorded a wealth of data in proton-proton, proton-nucleus and nucleus-nucleus collisions at several beam energies. In this proceeding, I discuss the invariant yield and azimuthal anisotropy measurement of strange hadrons in nucleus-nucleus collisions at SPS, RHIC, and LHC.

   nucl-exhep-exhep-phEPJ Web Conf.(2022)·1 citation
2. 02*

   Weak binding effects on the structure of ${}^{40}$Mg

   A. O. Macchiavelli🇺🇸 · H. L. Crawford🇺🇸 · P. Fallon🇺🇸 · R. M. Clark · A. Poves🇪🇸

   While the phenomenon of one- and two-neutron ground-state halo nuclei is well established, the effects of weak binding on nuclear excitation properties remain largely unexplored. Motivated by this question and by recent data in ${}^{40}$Mg we investigate the coupling of weakly bound (halo) valence neutrons to a core using the known properties of ${}^{40}$Mg to explore and illustrate possible particle-core coupling schemes and their impact on the low-lying excitation spectrum.

   ↳ nucl-thnucl-exEPJA(2022)·9 citations
3. 03*

   Deeply virtual Compton scattering cross section at high Bjorken $x_B$

   F. Georges🇫🇷 · M.N.H. Rashad🇺🇸 · A. Stefanko🇺🇸 · M. Dlamini🇺🇸 · B. Karki🇺🇸 · S.F. Ali🇺🇸 · P-J. Lin🇺🇸 · H-S Ko🇫🇷 · N. Israel🇺🇸 · D. Adikaram🇺🇸 · Z. Ahmed🇨🇦 · H. Albataineh🇺🇸 and 150 other authors

   We report high-precision measurements of the Deeply Virtual Compton Scattering (DVCS) cross section at high values of the Bjorken variable $x_B$. DVCS is sensitive to the Generalized Parton Distributions of the nucleon, which provide a three-dimensional description of its internal constituents. Using the exact analytic expression of the DVCS cross section for all possible polarization states of the initial and final electron and nucleon, and final state photon, we present the first experimental extraction of all four helicity-conserving Compton Form Factors (CFFs) of the nucleon as a function of $x_B$, while systematically including helicity flip amplitudes. In particular, the high accuracy of the present data demonstrates sensitivity to some very poorly known CFFs.

   ↳ hep-phhep-exnucl-exPRL(2022)·63 citations
4. 04*

   Study of threshold anomaly in elastic scattering of ${}^{14}$N by ${}^{56}$Fe and ${}^{90}$Zr

   K. K. Jena · S. Senapati · B. B. Sahu · Jajati K. Nayak🇮🇳 · S. K. Agarwalla

   We use a phenomenological nucleus-nucleus optical potential constructed in the light of a potential developed by Ginocchio to study the elastic angular distributions of different nuclear systems near Coulomb barrier. The differential cross section ratios of elastic to Rutherford are studied for systems ${}^{14}$N+${}^{56}$Fe and ${}^{14}$N+${}^{90}$Zr for several colliding energies. Our theoretical predictions are well competitive with the experimental data, and the significantly small imaginary part of the potential explains the elastic scattering cross section and threshold anomaly in both systems.

   ↳ nucl-thnucl-ex2 citations
5. 05*

   Bayesian inference of finite-nuclei observables based on the KIDS model

   Jun Xu🇨🇳 · Panagiota Papakonstantinou🇰🇷

   Bayesian analyses on both isoscalar and isovector nuclear interaction parameters are carried out based on the Korea-IBS-Daegu-SKKU (KIDS) model under the constraints of nuclear structure data of ${}^{208}$Pb and ${}^{120}$Sn. Under the constraint of the neutron-skin thickness, it is found that incorporating the curvature parameter $K_{sym}$ of nuclear symmetry energy as an independent variable significantly broadens the posterior probability distribution function (PDF) of the slope parameter $L$, and affects the related correlations. Typically, the anticorrelation between $L$ and the symmetry energy at saturation density disappears, while a positive correlation between $L$ and $K_{sym}$ is observed. Under the constraint of the isoscalar giant monopole resonance (ISGMR), incorporating the skewness parameter as an independent variable also significantly broadens the posterior PDF of the nuclear matter incompressibility $K_0$. Even with the broad uncertainties of higher-order parameters of the equation of state (EOS), robust constraints of $L<90$ MeV and $K_0<270$ MeV are obtained. Our study quantifies the consistency between the constraints on $L$ from the neutron-skin data of PREXII and isovector giant dipole resonance (IVGDR) data, and the constraints on $K_0$ from the data of ISGMR in ${}^{208}$Pb and ${}^{120}$Sn.

   ↳ nucl-thnucl-exPRC(2022)·26 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.