M. Colonna
A5085347589- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Quantum, superfluid, helium dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- High-pressure geophysics and materials
- Advanced NMR Techniques and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Neutrino Physics Research
- Pulsars and Gravitational Waves Research
- Particle accelerators and beam dynamics
- Astro and Planetary Science
- Advanced Chemical Physics Studies
- Cold Fusion and Nuclear Reactions
- Particle physics theoretical and experimental studies
- Quantum chaos and dynamical systems
- Statistical Mechanics and Entropy
- Atomic and Subatomic Physics Research
- Nuclear Materials and Properties
- Advanced Thermodynamics and Statistical Mechanics
- Gamma-ray bursts and supernovae
- Theoretical and Computational Physics
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2016-2025
Istituto Nazionale di Fisica Nucleare
2014-2025
University of Catania
2001-2023
The Ohio State University
2023
GSI Helmholtz Centre for Heavy Ion Research
2023
Osservatorio Astrofisico di Catania
2009
Michigan State University
2004
National Superconducting Cyclotron Laboratory
2004
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2001
GANIL
1993-1998
We try to single out some qualitative effects of coupling a \ensuremath{\delta}-isovector-scalar meson, introduced in minimal way phenomenological hadronic field theory. Results for the equation state (EOS) and phase diagram asymmetric nuclear matter (ANM) are discussed. stress consistency \ensuremath{\delta}-coupling introduction relativistic approach. Contributions slope curvature symmetry energy neutron-proton effective mass splitting appear particularly interesting. A more repulsive EOS...
We compare ten transport codes for a system confined in box, aiming at improved handling of the production $\Delta$ resonances and pions, which is indispensable constraining high-density symmetry energy from observables such as $\pi^-/\pi^+$ yield ratio heavy-ion collisions. The box initialized with nucleons saturation density 60 MeV temperature. reactions $NN\leftrightarrow N\Delta$ $\Delta\leftrightarrow N\pi$ are implemented, but Pauli blocking mean-field potential deactivated present...
We show that in collisions with neutron-rich heavy ions at energies around the production threshold ${K}^{0}$ and ${K}^{+}$ yields probe isospin-dependent part of nuclear equation state high baryon densities. In particular, we suggest ${K}^{0}/{K}^{+}$ ratio as a promising observable. Results obtained covariant relativistic transport approach are presented for $\mathrm{Au}+\mathrm{Au}$ $0.8--1.8A\text{ }\mathrm{GeV}$. The focus is put on influence which goes beyond collision-cascade picture....
Within the transport model evaluation project (TMEP) of simulations for heavy-ion collisions, mean-field response is examined here. Specifically, zero-sound propagation considered neutron-proton symmetric matter enclosed in a periodic box, at zero temperature and around normal density. The results several codes belonging to two families (BUU-like QMD-like) are compared among each other exact calculations. For BUU-like codes, employing test particle method, depend on combination number...
The 40 Ca( 18 O, F) K single charge exchange (SCE) reaction is explored at an incident energy of 275 MeV and analyzed consistently by collecting the elastic scattering inelastic data under same experimental conditions. Full quantum-mechanical SCE calculations direct mechanism are performed including microscopic nuclear structure inputs adopting either a bare optical potential or coupled channel equivalent polarization (CCEP) constrained data. describes magnitude shape angular distributions...
Background: Charge-exchange (CE) reactions offer a major opportunity to excite nuclear isovector modes, providing important clues about the interaction in medium. Moreover, double charge-exchange are proving be tempting tool access transition matrix elements (NMEs) related beta-decay processes. The latter also of crucial importance extract neutrino properties from half-life hypothetical neutrinoless beta decay and search for physics beyond standard model.Purpose: Through multichannel...
Within a parton cascade approach we investigate the scaling of differential elliptic flow $v_2(p_T)$ with eccentricity $ε_x$ and system size its sensitivity to finite shear viscosity. We present calculations for viscosity entropy density ratio $η/s$ in range from $1/4π$ up $1/π$, finding that $v_2$ saturation value varies by about factor 2. Scaling $v_2(p_T)/ε_x$ is seen also which indicates it does not prove perfect hydrodynamical behavior, but compatible plasma at $η/s$. Introducing...
High-energy heavy-ion collisions are studied to access nuclear-matter properties at high density. Particular attention is paid the selection of observables sensitive poorly known symmetry energy baryon density, large fundamental interest, even for astrophysics implications. Using fully consistent transport simulations built on effective theories, we test isospin ranging from nucleon and cluster emissions collective flows (in particular elliptic, squeeze-out, part). The effects competition...
The theory of heavy ion single charge exchange reactions is reformulated. In momentum space the reaction amplitude factorizes into a product projectile and target transition form factors, folded with nucleon-nucleon isovector interaction distortion coefficient which accounts for initial final state ion-ion elastic interactions. multipole structure factors studied in detail Fermi-type non-spin flip Gamow-Teller-type spin transitions, also serving to establish connection nuclear beta decay....
Background: Double charge exchange (DCE) nuclear reactions have recently attracted much interest as tools to provide experimentally driven information about matrix elements of in the context neutrinoless double-$\ensuremath{\beta}$ decay. In this framework, a good description reaction mechanism and complete knowledge initial final-state interactions are mandatory. Presently, not enough is known details optical potentials response isospin operators for many projectile-target systems proposed...
Heavy ion double charge exchange reactions are described by sequential meson-exchange, corresponding to a single (DSCE) reaction mechanism. The theoretical formulation is discussed. fully quantum mechanical distorted wave 2-step calculations shown be reproduced very well approximating the intermediate propagator its pole part. role of ion-ion elastic interactions As first application, performed for Ca40(O18,Ne18)40Ar at 15 AMeV. Results compared data measured LNS NUMEN Collaboration. Formal...
NUMEN proposes an innovative technique to access the nuclear matrix elements entering expression of lifetime double beta decay by cross-section measurements heavy-ion induced Double Charge Exchange (DCE) reactions. Despite fact that two processes, namely neutrinoless and DCE reactions, are triggered weak strong interaction respectively, important analogies suggested. The basic point is coincidence initial final state many-body wave functions in types processes formal similarity transition...
We discuss a fully relativistic Landau Fermi liquid theory based on the quantum hadrodynamics effective field picture of nuclear matter. From linearized kinetic equations we get dispersion relations propagating collective modes. focus our attention dynamical effects interplay between scalar and vector channel contributions. An interesting ``mirror'' structure in form response isoscalar-isovector degree freedom is revealed, with complete parallelism role respectively played by compressibility...