A5074959501- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Advanced Measurement and Metrology Techniques
- Optical measurement and interference techniques
- Surface Roughness and Optical Measurements
- High-pressure geophysics and materials
- Adaptive optics and wavefront sensing
- Fluid Dynamics and Turbulent Flows
- Nuclear reactor physics and engineering
- Black Holes and Theoretical Physics
- Solar and Space Plasma Dynamics
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Superconducting Materials and Applications
- History and Developments in Astronomy
- Stellar, planetary, and galactic studies
- Neutrino Physics Research
- Astronomical Observations and Instrumentation
- Nuclear Physics and Applications
- Astro and Planetary Science
- Advanced optical system design
University of Catania
2016-2025
Istituto Nazionale di Fisica Nucleare
2007-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2015-2024
TU Wien
2024
National Institute of Optics
2007-2022
Federico II University Hospital
2022
Indian Institute of Technology Goa
2020
Homi Bhabha National Institute
2020
Variable Energy Cyclotron Centre
2020
University of Chinese Academy of Sciences
2016-2018
Coalescence of minijet partons with from the quark-gluon plasma formed in relativistic heavy ion collisions is suggested as mechanism for production hadrons intermediate transverse momentum. The resulting enhanced antiproton and pion yields at momenta give a plausible explanation observed large to ratio. With further increasing momentum, ratio predicted decrease approach small value given by independent fragmentations after their energy loss plasma.
Using a covariant coalescence model, we study hadron production in relativistic heavy ion collisions from both soft partons the quark-gluon plasma and hard minijets. Including transverse flow of independent fragmentation minijet partons, model is able to describe available experimental data on pion, kaon, antiproton spectra. The resulting pion ratio seen increase at low momenta reaches value about 1 intermediate momenta, as observed RHIC. A similar dependence antikaon momentum obtained, but...
Thermalization and collective flow of charm (c) bottom (b) quarks in ultrarelativistic heavy-ion collisions are evaluated based on elastic parton rescattering an expanding quark-gluon plasma (QGP). We show that resonant interactions a strongly interacting QGP (sQGP), as well coalescence, can play essential role the interpretation recent data from BNL Relativistic Heavy-Ion Collider (RHIC), thus illuminate nature sQGP its hadronization. Our main assumption, motivated by findings lattice...
This writeup is a compilation of the predictions for forthcoming Heavy Ion Program at Large Hadron Collider, as presented CERN Theory Institute 'Heavy Collisions LHC - Last Call Predictions', held from May 14th to June 10th 2007.
Ultra-relativistic Heavy-Ion Collision (HIC) generates very strong initial magnetic field ($\vec B$) inducing a vorticity in the reaction plane. The high $\vec{B}$ influences evolution dynamics that is opposed by large Faraday current due to electric generated time varying $\vec{B}$. We show resultant effects entail significantly directed flow ($v_1$) of charm quarks (CQs) compared light combination several favorable conditions for CQs, mainly: (i) unlike formation scale $\tau_f \simeq \,...
In a coalescence plus fragmentation approach we calculate the heavy baryon/meson ratio and $p_T$ spectra of charmed hadrons $D^{0}$, $D_{s}$ $\Lambda_{c}^{+}$ in wide range transverse momentum from low up to about 10 GeV discuss their ratios RHIC LHC energies without any change parameters. We have included contribution decays hadron resonances also one due quarks which do not undergo process. The process is tuned all charm hadronizing $p_T\rightarrow 0$ limit at finite undergoing are...
We investigate effects of charm-quark interactions in a Quark-Gluon Plasma on the production $D$ and $J/\psi$ mesons high-energy heavy-ion collisions. Employing previously constructed coalescence model that successfully reproduces transverse momentum ($p_T$) spectra elliptic flow ($v_2(p_T)$) light hadrons at RHIC from underlying light-quark distributions phase transition temperature $T_c$, $D$-meson $p_T$ are evaluated. For distributions, we consider two limiting scenarios: (i) {\em no}...
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 evaluate heavy-quark (HQ) transport properties in a quark-gluon plasma (QGP) within Brueckner many-body scheme employing interaction potentials extracted from thermal lattice QCD. The in-medium T matrices for elastic charm- and bottom-quark scattering off light quarks the QGP are dominated by attractive meson diquark channels which support resonance states up to temperatures of ~1.5T(c). resulting drag coefficient increases with decreasing temperature, contrary expectations based on...
The heavy quarks constitutes a unique probe of the quark-gluon plasma properties. Both at RHIC and LHC energies puzzling relation between nuclear modification factor $R_{AA}(p_T)$ elliptic flow $v_2(p_T)$ has been observed which challenged all existing models, especially for D mesons. We discuss how temperature dependence quark drag coefficient is responsible large part such puzzle. In particular, we have considered four different models to evaluate diffusion coefficients propagating through...
The shear viscosity $\ensuremath{\eta}$ has been calculated by using the Green-Kubo relation in framework of a partonic transport approach solved at cascade level. We compare numerical results for obtained from correlator with analytical formulas both relaxation time approximation (RTA) and Chapman-Enskog (CE) approximation. investigate emphasize differences between isotropic anisotropic cross sections massless massive particles. show that range temperature explored heavy ion collision...
The thermodynamic behavior of QCD matter at high temperature is currently studied by lattice theory. main features are the fast rise energy density $\epsilon$ around critical $T_c$ and large trace anomaly momentum tensor $< \Theta_\mu^\mu >=\epsilon - 3 P$ which hints a strongly interacting system. Such can be accounted for employing massive quasi-particle model with temperature-dependent bag constant. Recent calculations physical quark masses Wuppertal-Budapest group have shown slower...
Several transport models have been employed in recent years to analyze heavy-flavor meson spectra high-energy heavy-ion collisions. Heavy-quark coefficients extracted from these with their default parameters vary, however, by up a factor of 5 at high momenta. To investigate the origin this large theoretical uncertainty, systematic comparison heavy-quark is carried out between various models. Within common scheme devised for nuclear modification charm quarks brick medium quark-gluon plasma,...
We describe the propagation of charm quarks in quark-gluon plasma (QGP) by means a Boltzmann transport approach. Nonperturbative interaction between heavy and light have been taken into account through quasiparticle approach which partons are dressed with thermal masses tuned to lattice quantum chromodynamics (lQCD) thermodynamics. Such model is able main feature nonperturbative dynamics: enhancement strength near ${T}_{c}$. show that resulting in-medium evolution correctly predict...
The propagation of heavy quarks in the quark-gluon plasma was often treated within framework Langevin equation (LV), i.e., assuming momentum transfer is small or scatterings are sufficiently forward peaked, screening mass ${m}_{D}$. We address a direct comparison between dynamics and Boltzmann collisional integral (BM) when bulk medium equilibrium at fixed temperature. show that unless cross section quite peaked $({m}_{D}\ensuremath{\cong}T)$ to temperature ratio large...
We explore the impact of strong classical color fields, which occur in earliest stages heavy-ion collisions and are known as glasma, on transport hard probes, namely heavy quarks jets. To achieve this, we simulate SU(3) fields using real-time lattice gauge theory couple them to an ensemble test particles whose dynamics described by Wong's equations. provide overview how algebras constructed introduce a method generate random charges. extensively our numerical particle solver limits...
In the last decade a Quasi-Particle Model (QPM) has been developed to study charm quark dynamics in ultra-relativistic heavy-ion collisions supplying satisfactory description of main observables for D meson and providing an estimate space-diffusion coefficient Ds(T) from phenomenology. this paper, we extend approach bottom quarks describing their propagation quark-gluon plasma within event-by-event full Boltzmann transport followed by coalescence plus fragmentation hadronization. We find...
Abstract We study the production of charmed and multi-charmed hadrons in ultra-relativistic Heavy Ion Collisions coupling transport approach for charm dynamics medium to an hybrid hadronization model coalescence plus fragmentation. In this paper, we mainly discuss particle yields single baryons focusing on $$\Xi _{cc}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>Ξ</mml:mi> <mml:mrow> <mml:mi>cc</mml:mi> </mml:mrow> </mml:msub> </mml:math> $$\Omega _{ccc}$$...
Heavy-flavor hadrons produced in ultrarelativistic heavy-ion collisions are a sensitive probe for studying hadronization mechanisms of the quark-gluon-plasma. In this paper, we survey how different transport models simulation heavy-quark diffusion through quark-gluon plasma implement and affects final state observables. Utilizing same input charm-quark distribution all at transition, find that transverse-momentum dependence nuclear modification factor various charm hadron species has...