Nuclear Matter and Nuclear Dynamics

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1. Apparenté Pas pertinent

   Towards Precise and Accurate Calculations of Neutrinoless Double-Beta Decay: Project Scoping Workshop Report

   V. Cirigliano, Z. Davoudi, J. Engel et al. · 2022 · J. Phys. G: Nucl. Part. Phys. 49, 120502 (2022) · Résumé IA disponible

   Résumé scientifique

   We present the results of a National Science Foundation (NSF) Project Scoping Workshop, the purpose of which was to assess the current status of calculations for the nuclear matrix elements governing neutrinoless double-beta decay and determine if more work on them is required. After reviewing important recent progress in the application of effective field theory, lattice quantum chromodynamics, and ab initio nuclear-structure theory to double-beta decay, we discuss the state of the art in nuclear-physics uncertainty quantification and then construct a road map for work in all these areas to fully complement the increasingly sensitive experiments in operation and under development. The road …

2. Apparenté Pas pertinent

   Probing Nuclear Structure of Heavy Ions at the Large Hadron Collider

   Heikki Mäntysaari, Björn Schenke, Chun Shen et al. · 2024 · Physique nucléaire théorique · Résumé IA disponible

   Résumé scientifique

   We perform high-statistics simulations to study the impacts of nuclear structure on the ratios of anisotropic flow observables in $^{208}$Pb+$^{208}$Pb and $^{129}$Xe+$^{129}$Xe collisions at the Large Hadron Collider. Even with $40\%$ difference in atomic numbers between $^{208}$Pb and $^{129}$Xe nuclei, the ratios of anisotropic flow in the same centrality class between the two collision systems are strongly affected by the nuclear structure inputs in the initial state. The ratios of $v_2\{4\}/v_2\{2\}$ in these collisions are sensitive to the nuclear skin thickness of the colliding nuclei, providing indirect constraints on the nuclei's neutron skin. Our model predictions serve as a benchm…

3. Apparenté Pas pertinent

   Investigating Dark Matter-Admixed Neutron Stars with NITR Equation of State in Light of PSR J0952-0607

   Pinku Routaray, Sailesh Ranjan Mohanty, H. C. Das et al. · 2023 · Physique nucléaire théorique · Résumé IA disponible

   Résumé scientifique

   The heaviest pulsar, PSR J0952-0607, with a mass of $M=2.35\pm0.17 \ M_\odot$, has recently been discovered in the disk of the Milky Way Galaxy. In response to this discovery, a new RMF model, "NITR" has been developed. The NITR model's naturalness has been confirmed by assessing its validity for various finite nuclei and nuclear matter (NM) properties, including incompressibility, symmetry energy, and slope parameter values of 225.11, 31.69, and 43.86 MeV, respectively. These values satisfy the empirical/experimental limits currently available. The maximum mass and canonical radius of a neutron star (NS) calculated using the NITR model parameters are 2.35 $M_\odot$ and 12.73 km, respectivel…

4. Apparenté Pas pertinent

   Theory of Jet Quenching in Ultra-Relativistic Nuclear Collisions

   Guang-You Qin · 2014 · Physique nucléaire théorique · Résumé IA disponible

   Résumé scientifique

   We present a short overview of recent progress in the theory of jet quenching in ultra-relativistic nuclear collisions, including phenomenological studies of jet quenching at RHIC and the LHC, development in NLO perburbative QCD calculation of jet broadening and energy loss, full jet evolution and modification, medium response to jet transport, and lattice QCD and AdS/CFT studies of jet quenching.

5. Apparenté Pas pertinent

   Models for photo- and electro-production of K^+ in view of new data

   P. Bydzovsky, F. Cusanno, S. Frullani et al. · 2003 · Physique nucléaire théorique · Pas encore résumé

   Résumé scientifique

   Predictions of isobaric and Regge models are compared with the latest experimental data (Bonn,JLab) to select among the models those providing a satisfactory description of the data. Only the Saclay-Lyon and MAID models are in a reasonable agreement with both photo- and electro-production data ranging up to about 2.5 GeV.

6. Apparenté Pas pertinent

   Modeling the diffusive dynamics of critical fluctuations near the QCD critical point

   Marlene Nahrgang, Marcus Bluhm · 2020 · Phys. Rev. D 102, 094017 (2020) · Résumé IA disponible

   Résumé scientifique

   The experimental search for the QCD critical point by means of relativistic heavy-ion collisions necessitates the development of dynamical models of fluctuations. In this work we study the fluctuations of the net-baryon density near the critical point. Due to net-baryon number conservation the correct dynamics is given by the fluid dynamical diffusion equation, which we extend by a white noise stochastic term to include intrinsic fluctuations. We quantify finite resolution and finite size effects by comparing our numerical results to analytic expectations for the structure factor and the equal-time correlation function. In small systems the net-baryon number conservation turns out to be quan…

7. Apparenté Pas pertinent

   Parameterization of the Woods-Saxon Potential for Shell-Model Calculations

   N. Schwierz, I. Wiedenhover, A. Volya · 2007 · Physique nucléaire théorique · Résumé IA disponible

   Résumé scientifique

   The drastically expanded use of the Woods-Saxon potential in modern day nuclear physics and the availability of new nuclear data motivated us to review and optimize the parameters of this potential to the experimental single-nucleon spectra around the doubly-magic nuclei between $^{16}$O and $^{208}$Pb. We obtain a parameterization which is applicable over the whole nuclear chart for nuclides between $^{16}$O and the heaviest elements. Apart from Coulomb components the obtained parameter set is isospin symmetric. We demonstrate that the potential provides a good description of the nuclear mean field leading to quality single-particle spectra, nuclear radii, prediction of drip-lines, shell cl…

8. Apparenté Pas pertinent

   Electromagnetic isoscalar rho-pi-gamma exchange current and the anomalous action

   E. Truhlik, J. Smejkal, F. C. Khanna · 2000 · Nucl.Phys. A689 (2001) 741-752 · Pas encore résumé

   Résumé scientifique

   Using modern data, we first refit constants needed to complete an anomalous pi-rho-omega-a_1 Lagrangian obtained within the approach of hidden local symmetries. Then we derive from this Lagrangian electromagnetic isoscalar rho-pi-gamma and rho-a_1-gamma currents needed in calculations of the deuteron electromagnetic form factors at large momentum transfers.