Conveners
Heavy Ions: Parallel 3
- Anthony Frawley (Florida State University)
Heavy Ions: Parallel 3
- There are no conveners in this block
Heavy Ions: Parallel 3
- Chandra Akondi
Heavy Ions: Parallel 3
- Volker Crede (Florida State University)
Heavy Ions: Parallel 3
- Joao Barata (BNL)
Heavy Ions: Parallel 3
- Farid Salazar (UCLA/UCB/LBNL)
Since the properties of the initial state of heavy-ion collisions are not directly accessible in experiments, there currently exists a variety of different models employed in fluid dynamic simulations of heavy-ion collisions.
In this talk I will give a brief overview over different initial-state models and introduce a new method to characterize initial density profiles by decomposing them in...
Ultra-relativistic heavy-ion collisions are expected to produce some of the strongest magnetic fields ($10^{13}$ $-$ $10^{16}$ Tesla) in the Universe. The initial strong electromagnetic fields have been proposed as a source of linearly-polarized, quasi-real photons that can interact via the Breit-Wheeler process to produce $e^{+}e^{-}$ pairs.
In this talk, we will present latest STAR...
The primary goal of the ultrarelativistic heavy-ion collision program at the LHC is to study the quark-gluon plasma (QGP) properties, a state of strongly interacting matter that exists at high temperatures and energy densities. However, the lack of knowledge on the initial conditions of heavy-ion collision results in significant uncertainty in the extraction of the transport properties of...
The collisions of heavy nuclei at ultra-relativistic LHC energies produce an extreme phase of strongly-interacting matter called the quark-qluon plasma (QGP). Since more than 10 years the ALICE Collaboration at CERN has been studying the nature of the QGP by analysing the data from various collision types provided by the LHC: proton-proton, proton-nucleus and nucleus-nucleus. Here, the results...
Relativistic nuclear collision experiments explore the physics of dense and hot nuclear matter, the so-called quark-gluon plasma (QGP). The bulk properties of such matter can be inferred indirectly from the yields and correlations of the produced hadrons. Nevertheless, the relevant degrees of freedom of the QGP and are subject to the effects of multiple rescatterings and non- perturbative...
This talk presents a new measurement studying the relationship between the production of hard and soft particles through the correlation of Upsilon meson states with the inclusive charged particle yields in 13 TeV pp collisions. These correlations, and in particular their comparison between excited and ground state Upsilons meson, lead to surprising conclusions about heavy quarkonium...
Study of the QCD phase diagram is important for understanding the physics of the early universe and the interiors of high-density stars. Recently, experiments such as RHIC or GSI have been conducted to explore a wide range of the phase diagram including the QCD critical point. From theoretical analyses, there are many previous studies using lattice QCD or effective models. However, the full...
The sPHENIX detector at RHIC is currently under construction and is on schedule for first data in early 2023. At mid-rapidity it consists of a silicon pixel vertexer, a silicon strip detector with single event timing resolution and a compact TPC; as well as an EM calorimeter and a 1.4T BaBar superconducting solenoid sandwiched by an inner and outer hadronic calorimeter.
sPHENIX will allow...
Searching QCD critical point is one of the fundamental goals of heavy-ion collisions. The observed non-monotonic behavior with the colliding energies[1,2] was declared to be related to the critical point of the QCD phase diagram[3,4].
To reveal the critical fluctuations effects on the light-nuclei productions, one should address the problem of scale separation and magnitude separation...
The phase structure of baryonic matter is investigated with focus on the role of fluctuations beyond the mean-field approximation. The prototype test case studied is the chiral nucleon-meson model, with added comments on the chiral quark-meson model. Applications to nuclear matter include the liquid-gas phase transition. Extensions to high baryon densities are performed for both nuclear and...
The PHENIX experiment collected data from a variety of collision species and energies at the Relativistic Heavy Ion Collider (RHIC) through 2016. Analyses of the large amounts of data collected continue to yield intriguing results that further our understanding of QCD from understanding properties of the proton to the hot dense phase of nuclear matter produced in heavy ion collisions known as...
Understanding the high energy limit of Quantum Chromodynamics (QCD) is one of the outstanding goals in nuclear and particle physics. At very high energies, it is conjectured that hadrons and nuclei transform into a universal form of matter known as the Color Glass Condensate (CGC). The CGC is an effective field theory for high-density saturated small-x gluons. This framework has been...
Deconfined quarks and gluons are expected to be created in the relativistic heavy-ion collision. According to the coalescence model, yields of exotic hadrons are expected to be strongly affected by their structures [1]. Searching for exotic state particles and studying their properties can extend our understanding of quantum chromodynamics (QCD). The $f_{0}$(980) resonance is an exotic state...
One of the main goals of ultra-relativistic nuclear collisions is to create a new state of matter called quark-gluon plasma (QGP) and study its properties. Anisotropic flow $v_n$, defined as the correlation of the azimuthal angle of each particle with respect to a common symmetry plane $\Psi_n$, is an ideal probe of QGP's properties. The $v_n$ and $\Psi_n$ represent the magnitude and the phase...
The quark-gluon plasma (QGP) is a deconfined state of nuclear matter made of free quarks and gluons, created under high temperature or energy density. Charmonia, bound states of charm and anti-charm quarks, are very special probes of the deconfined medium. $J/\psi$, the vector meson ground state of the charmonium family is abundantly produced at the LHC energies but its production mechanism is...
When center-of-mass energy in heavy-ion collisions decreases down $\sqrt{s_\mathrm{NN}}$ of a few GeV, colliding nuclei are not transparent anymore to each other. This leads to increasingly strong baryon stopping in the collision zone, and the formation of baryon-rich matter, where effects due to resonance excitation play an essential role. The goal is to understand the properties of such a...
We consider the experimental data on yields of protons, strange ฮโs, and multistrange baryons (ฮ, ฮฉ), and antibaryons production on nuclear targets, and the experimental ratios of multistrange to strange antibaryon production, at the energy region from SPS up to LHC, and compare them to the results of the Quark-Gluon String Model calculations. In the case of heavy nucleus collisions, the...
The NA61/SHINE experiment aims to discover the critical point of strongly interacting matter and study the properties of the onset of deconfinement. For this purpose, we perform a two-dimensional scan of the phase diagram by varying the collisions' energy and system size.
The NA61/SHINE results from a strong interaction measurement program will be presented in this presentation. In...
The pion-nucleus reaction is an important source of information about hadronic matter. At incident momenta below 2 GeV/c, it gives access in a very unique way to the properties of baryonic resonances in the nuclear medium. While the region of the ฮ(1232) resonance, corresponding to incident pion beam momenta of about 300 MeV/c, was studied in detail in the past, only very scarce measurements...
Production of strange quarks in relativistic heavy-ion collisions is not only used as a signature of QGP formation but also as a diagnostic tool. Strange quarks and antiquarks are produced via strong interactions in the QGP medium and are not present in ordinary matter. The reason is that they promptly undergo decay via weak interactions as soon as they are produced. Additionally, the mass of...
Finding the experimental signatures of the local $CP$ violation in the strong interaction is one of the major interests in high-energy physics. Chiral Magnetic Effect (CME) is predicted to occur in the heavy-ion collisions. Although some non-zero results of CME sensitive observables have been obtained at both RHIC and LHC energies in the past decades, search for conclusive evidence of CME is...
In 2023, the sPHENIX detector at BNLโs Relativistic Heavy Ion Collider (RHIC) will begin measuring a suite of unique jet and heavy flavor observables with unprecedented statistics and kinematic reach at the RHIC energies using combined EM and hadronic calorimeters and high precision tracking.
The experiment incorporates full azimuth vertexing, tracking, and a complete set of electromagnetic...
We study the evolution of the doubly charmed state $T_{cc}^+$ in a hot hadron gas produced in the late stage of heavy-ion collisions. We use effective Lagrangians to calculate the thermally averaged cross sections of $T_{cc}^+$ production in reactions such as $ D^{(*)} D^{(*)} \rightarrow T_{cc}^+ \pi, T_{cc}^+ \rho $ and its absorption in the corresponding inverse processes. We then...
We investigate the phase structure and thermodynamic properties of
the Polyakov loop-extended chiral quark mean-field model at different val-
ues of temperature and density. We explore the effect of finite volume and
magnetic field on phase transition from confined hadronic state to decon-
fined quarks. A shift of phase boundary to higher values of quark chemical
potential ($ฮผ_q$)...
The midrapidity transverse momentum (pt) distributions of the charged pions and kaons, protons and antiprotons, measured by ALICE Collaboration at nine centrality groups of Xe+Xe collisions at (snn)1/2=5.44 TeV, have been described quite well using simultaneous (combined) minimum ฯ2 fits with the simple (non-consistent) as well as thermodynamically consistent Tsallis function with included...
The main motivation is to understand anisotropic flow in deformed collision systems. Here, we will discuss elliptic flow and other higher order flow coefficients (n$\le$4). These coefficients carry essential information about the dynamics of the created medium. The study of anisotropic flow coefficients v n in Xe-Xe collisions at 5.44 TeV under Monte Carlo HYDJET++ model (HYDrodynamics plus...
