Conveners
Heavy Ion Collisions and QCD Phases: 1
- Alessandra Fantoni (INFN Laboratori Nazionali di Frascati)
- Kara Mattioli (Subatech)
Heavy Ion Collisions and QCD Phases: 2
- David Dobrigkeit Chinellato (Austrian Academy of Sciences)
Understanding the collective behavior emerging in high-energy collisions is a central goal of contemporary heavy-ion physics. Using recent results from the LHC, this talk will present an experimental overview of how light and strange hadrons, as well as (hyper)nuclei, serve as soft probes of the dynamics and hadronization of the Quark-Gluon Plasma.
The presentation will cover selected...
Whether or not femto-scale droplets of quark-gluon plasma (QGP) are formed in so-called small systems at high-energy colliders is a pressing question in the phenomenology of the strong interaction. For proton-proton or proton-nucleus collisions the answer is inconclusive due to the large theoretical uncertainties plaguing the description of these processes. While upcoming data on collisions of...
Quantum chromodynamics (QCD), the fundamental theory of the strong interaction, predicts that at sufficiently high energy densities, nuclear matter undergoes a phase transition into a deconfined state known as the quark–gluon plasma (QGP). Ultrarelativistic heavy-ion collisions provide ideal conditions to explore the QCD phase diagram and investigate the properties of the QGP as a function of...
Enrico De Filippo (INFN Catania)
for the R3B Collaboration
Constraining the asymmetry term of the EoS is important, among other reasons, for its strict connection with multi-messenger astrophysics, such as compact stars and core collapse supernovae phenomena. By using as main observable the elliptic flow ratio of neutrons and charged particles [1,2], the ASY-EOS...
Heavy-ion collisions in the few-GeV energy range allow the creation of strongly interacting matter under extreme net-baryon densities, conditions which are comparable to the ones in neutron star mergers. The precise investigation of the Equation-of-State (EoS) of this kind of matter is therefore of high relevance for the understanding of neutron stars.
In this contribution, we present new...
Heavy-ion collisions offer a unique opportunity to probe the equation of state (EoS) of baryonic matter across a range of densities. However, extracting quantitative constraints from comparisons with transport model predictions requires careful consideration of several factors, such as the choice of observables and ensuring comparable conditions between experimental and simulated data. In...
We investigate the finite-temperature equation of state (EOS) within an effective Lagrangian framework, where a dilaton field accounts for the breaking of scale symmetry in QCD. We start by extending a previous investigation in the pure gauge $SU (3)_c$ sector [1], describing the dynamics of the gluon condensate in terms of a dilaton Lagrangian. Below the critical temperature, the condensate...
Quantum Chromodynamics (QCD) predicts the existence of a deconfined state of quarks and gluons, known as the Quark-Gluon Plasma (QGP), which forms in relativistic heavy-ion collisions. Investigating the transport properties and inner workings of the QGP offers unique insights into the strong interaction. Heavy quarks, produced in the initial hard scatterings of these collisions, serve as...
Heavy quarks (i.e. charm and beauty), produced in the early stages of high-energy hadronic and nuclear collisions through hard-scattering processes, serve as exceptional probes for investigating Quantum Chromodynamics (QCD) in extreme conditions and for rigorous perturbative QCD (pQCD) tests. Their large masses ensure that the heavy-quark production at the early stage is calculable within...
Understanding the phase structure of strongly interacting matter is a central goal in high-energy nuclear physics. Electromagnetic probes—such as photons and dileptons—offer a unique window into the space-time evolution of the quark-gluon plasma (QGP) and hadronic matter created in relativistic heavy-ion collisions. Unlike hadrons, these probes interact only electromagnetically and thus carry...
Charm production measurements at fixed-target energies at the LHC offer unique opportunities for hadronisation studies sensitive to the beam remnants, constraints on parton distribution functions of the proton and the nucleus including intrinsic charm as well as studies sensitive to deconfinement in nucleus-nucleus collisions.
LHCb pionneered charm production measurements in proton-nucleus...
Charmonium, a bound state of a charm and an anticharm quarks, represents a valuable tool to investigate the properties of the quantum chromo-dynamics (QCD). In particular, charmonium production mechanism involves both perturbative (heavy quark pair production) and non-perturbative (hadronization into the final quarkonium state) aspects, making it an important test ground for the theoretical...
Quarkonia are bound states of a heavy quark and an antiquark of the same flavor. In pp collisions, such heavy quark masses require the quark pair to be produced in high-energy scatterings of partons in the colliding protons; once the quark and the antiquark are created, their binding into quarkonium states involves large spatial separations and low momentum scales. The whole production...
Quarkonium production has long been recognized as a key probe for exploring the properties of the quark-gluon plasma (QGP). Among various observables, azimuthal anisotropies in quarkonium production offer valuable insights to investigate its collective behavior in a strongly interacting medium. In particular, the measurement of $\rm{J}/\psi$ elliptic flow ($v_2$) in Pb–Pb collisions at the LHC...
