Conveners
Hadrons in hot and nuclear environment: Session 1
- Angela Badala' (Istituto Nazionale di Fisica Nucleare)
Hadrons in hot and nuclear environment: Session 2
- Enrico Robutti (Istituto Nazionale di Fisica Nucleare)
Hadrons in hot and nuclear environment: Session 3
- Angela Badala' (Istituto Nazionale di Fisica Nucleare)
Hadrons in hot and nuclear environment: Session 4
- Andrea Beraudo (Istituto Nazionale di Fisica Nucleare)
Hadrons in hot and nuclear environment: Session 5
- Andrea Beraudo (Istituto Nazionale di Fisica Nucleare)
Light-flavour hadrons constitute the bulk of particle production in high-energy hadronic collisions at LHC. Measurements of their transverse-momentum spectra, integrated yields, and relative abundances as a function of multiplicity provide crucial information on the hadronization process and on the properties of the system created in different collision systems. These multi-differential...
Improving the knowledge on how the strong interaction acts among hadrons is one of the frontiers in nuclear physics. A large amount of interactions among stable or unstable hadrons have not been measured yet and theoretical calculations with effective lagrangians and/or starting from first principles, with quarks and gluons as degrees of freedom, are still under development and in need of...
Strange hadrons constitute a unique tool for studying hadronization. While their production yield was first proposed as a clean signature of quark--qluon plasma formation in heavy-ion collisions, today the role of strangeness production in large and small collision systems is pivotal in understanding how a colored system streams into the observed gas of mesons and baryons. This started when...
I will present relevant results for the QCD phase diagram, within a combined framework of Ward Identities (WI) and Unitarized Effective Theories. On the one hand, WI provide model-independent results for susceptibilities with direct consequences on the relation between chiral and $U(1)_A$ restoration, key to understand the nature of the transition. Those WI also allow to derive scaling...
NA61/SHINE is, at the moment, the only multipurpose fixed-target facility studying particle production properties at p+p and A+A at the CERN Super Proton Synchrotron. The main goals of the NA61/SHINE strong-interactions program are to discover the critical point of strongly interacting matter as well as to study the properties of produced particles relevant for the study of the onset of...
Hadronic resonances produced in high-energy collisions at the LHC are powerful tools to investigate our understanding of QCD as the field theory responsible for hadron formation and, at the same time, describe the state of strongly interacting matter formed in heavy-ion collisions. The ${{\rm f}_{0}(980)}$ resonance was observed several years ago in $\pi\pi$ scattering experiments. Despite a...
Neutron stars and explosive astrophysical systems - such as supernovae
or compact star binary mergers - represent natural laboratories where
extreme states of baryonic matter are populated. Modeling such
environments assumes, among others, good understanding of zero and
finite temperature equations of state (EoS). In this talk I shall first
discuss the relation between...
We report the recent results of spectroscopy of deeply bound pionic atoms. After elaborate analyses, we deduced the chiral condensate at the nuclear saturation density to be reduced by a factor of 60+-3% (T. Nishi, K. Itahashi et al., Nat. Phys. (2023) doi:10.1038/s41567-023-02001-x). We also discuss our future plans to make the spectroscopy in the inverse kinematics.
$\eta^{\prime}$(958) meson has an exceptionally large mass among pseudoscalar mesons.
The origin of the large mass is considered to be a result of the chiral symmetry breaking and $\mathrm{U}_A(1)$ anomaly.
Many theoretical studies predict the mass reduction of the $\eta^{\prime}$ meson ranging in 37 MeV/$c^2$-150 MeV/$c^2$ in a nuclear matter where the chiral symmetry is partially restored....
I will explain how we applied thermal effective hadron theories to extract the spectral functions of $D$ and $D^*$ mesons at finite temperature. Then, by modeling the exotic $X(3872)$ / $X(4014)$ as dynamically-generated states out of the $D$ - $\bar{D}^*$ / $D^*$ - $\bar{D}^*$ meson rescattering, I will address the thermal dependence of their masses and decay widths. When these states...
The production of light (anti)nuclei has been measured over the last decades in many facilities ranging from low collision energies at the AGS and GSI to high energies at RHIC and the LHC. Despite the plethora of experimental results, the production mechanism of light (anti)nuclei is still mysterious and under intense debate in the scientific community. The experimental data are typically...
In recent years, the bulk viscosity of a quark gluon plasma is gaining
increasing attention concerning the beam energy scan program, since the bulk viscous effect is expected to be enhanced near a critical point. Here we address the question of whether heavy quarkonia, which are produced at the early stage of the heavy ion collisions, are sensitive
to the bulk viscous nature of the quark...
The formation mechanism of light (anti)nuclei produced in high-energy hadronic collisions is an open question that is being addressed both theoretically and experimentally. Moreover, the study of (anti)nuclei production at particle accelerators is relevant to model the flux of antinuclei produced in cosmic ray interactions, which represents the dominant background for dark matter searches. In...
One of the present challenges for the theoretical understanding of heavy-quark hadronization is represented by the description of the measurements of heavy baryon production in $pp$, $pA$ and $AA$ collisions. The $\Lambda_c/D^0$ ratio observed in $AA$ collisions has a value of the order of the unity, and experimental measurements in $pp$ collisions at both $\sqrt{s}=5.02 \,\rm TeV$ and...
Quantum Chromodynamics (QCD) predicts a deconfined state of quarks and gluons: Quark Gluon Plasma (QGP). Studying the transport and medium properties of QGP will greatly deepen our understanding of the strong interaction. Heavy quarks created in the collisions are golden probes of the medium and provide unique insights into in-medium energy loss, diffusion coefficient, hadronization mechanism...
Heavy quarks, namely charm and beauty, are very suitable probes of the colour-deconfined state of the hadronic matter called quark-gluon plasma (QGP) created in heavy-ion collisions. Since they are mainly produced in hard-scattering processes and hence in shorter timescales compared to the lifetime of the QGP, they experience the whole evolution of the system. Measurements of heavy-flavour...
We investigate the possibility to determine the value of the pion–nucleon sigma term precisely by the experimental observables of the deeply bound pionic atoms. We discuss the sensitivity of the observables of the deeply bound pionic atoms to the value of the sigma term. We find that the gap of the binding energies and the width of the deeply bound pionic states are good quantities for the...
We discuss the modification of the properties of the tetraquark-like $T_{cc}^+(3875)$ in dense nuclear matter. We consider the $T_{cc}^+$ in vacuum as a purely molecular isoscalar ($D^0D^{*+}/D^+D^{*0}$) bound state in $S-$wave, generated from a heavy-quark symmetry leading-order interaction between the charmed mesons. We compute the $D$ and $D^*$ spectral functions embeded in a nuclear...
In-medium mass of the light vector mesons $\rho$, $\omega$ with $J^{PC}=1^{--}$, and the parity partner of $\rho$, the axial-vector $A_1$ meson with $J^{PC}=1^{++}$, are studied in the nuclear matter in presence of an external magnetic field, accounting for the effects of (inverse) magnetic catalysis. The in-medium partial decay widths of the possible $A_1\rightarrow \rho \pi$ decay modes are...
The in-medium masses of the pseudoscalar $(D,{\bar D}, D_s^{\pm})$, and vector $(D^*,\bar{D}^*, D_s^{*\pm})$, open charm mesons are studied in isospin asymmetric magnetized nuclear matter, accounting for the effects of the magnetized Dirac sea. The in-medium masses of the open charm mesons are calculated from their interactions with the nucleons and scalar mesons within the generalized chiral...
We investigate the mass modifications of open strange mesons (vector $K^*$ and axial vector $K_1$) in (magnetized) isospin asymmetric nuclear matter using Quantum Chromodynamics sum rule (QCDSR) approach. The in-medium decay widths of $K^*$ $\rightarrow$ $K\pi$ and $K_1$ $\rightarrow$ $K^*\pi$ are studied from the mass modifications of $K_1$, $K^*$ and $K$ mesons, using a light quark-antiquark...
