14th International Conference on Nucleus-Nucleus Collisions (NN2024)

Session

Hot & Cold QCD

19 Aug 2024, 14:40

Whistler Conference Centre

Conveners

Hot & Cold QCD: QCD 1

• Randy Lewis (York University)

Hot & Cold QCD: QCD 2

• Nu Xu (LBNL)

Hot & Cold QCD: QCD 3

• Lijuan Ruan (BNL)

Hot & Cold QCD: QCD 4

• Jamie Karthein (Massachusetts Institute of Technology)

Hot & Cold QCD: QCD 5

• David Hornidge (Mount Allison University)

240. Nucleon Structure Functions at Large-x

Sanghwa Park (Jefferson Lab)

19/08/2024, 14:40

Hadron Physics and QCD

Invited Talk

In this talk, I will review the recent progress in the nucleon structure functions at large-x region. The ratio of F2 structure functions between the proton and neutron is of particular interest as it’s closely related to the d/u ratio, and its behavior at x->1 limit provides insights into the dynamics of quarks in non-perturbative region. The PDFs are poorly constrained in large-x low Q^2...

135. (Zoom) Collision-Energy Dependence of the Breit-Wheeler Process in Heavy-Ion Collisions and its Application to Nuclear Charge Radius Measurements

Xiaofeng Wang (Shandong University)

19/08/2024, 15:05

Relativistic Heavy Ion collisions, QGP

Contributed Oral

In ultra-relativistic heavy-ion collisions, strong electromagnetic fields arising from the Lorentz-contracted, highly charged nuclei can be approximated as a large flux of high-energy quasi-real photons that can interact via the Breit-Wheeler process to produce $e^{+}{e}^{-}$ pairs. The collision energy dependence of the cross section and the transverse momentum distribution of dielectrons from...

251. Tantalizing Structure in Long Range Correlations in High Multiplicity e+e- Collisions and Fourier Decomposition Using Archived ALEPH Data at 91-209 GeV

Chris McGinn (MIT)

19/08/2024, 15:20

Hadron Physics and QCD

Contributed Oral

We present measurements of two-particle angular correlations of charged particles emitted in high-energy e+e- collisions using data collected by the ALEPH detector at LEP between 1992 and 2000. The correlation functions are measured over a wide range of pseudorapidity and azimuthal angle as a function of charged particle multiplicity. Previous studies using LEP1 data at 91 GeV did not reveal...

327. New Approaches to Light Hypernuclei with Heavy Ion Beams, Image Analyses and Machine Learning

Takehiko Saito (High Energy Nuclear Physics Laboratory, RIKEN)

19/08/2024, 16:40

Hadron Physics and QCD

Invited Talk

Studies of hypernuclei have been contributing for understanding the fundamental baryonic interactions as well as the nature of dense nuclear matters. They have already been studied for almost seven decades in reactions involving cosmic rays and with meson- and electron-beams. In recent years, experimental hypernuclear physics enters a new era. Hypernuclei can also be studied by using energetic...

247. Dilepton Measurements with HADES as Probes of Hot and Dense Hadronic Matter

Niklas Schild (GSI)

19/08/2024, 17:05

Hadron Physics and QCD

Contributed Oral

Dileptons are an excellent probe to investigate strong-interaction matter under extreme conditions. Their penetrating nature not only enables e.g. temperature measurements unbiased by the collective expansion of the fireball, but also an insight to the microscopic structure of the matter under investigation. The HADES collaboration has measured virtual photons in the di-electron channel, in...

233. Exploring Baryon-Rich QCD Matter with CBM at FAIR: Status and Prospects

Dr Volker Friese (GSI Helmholtzzentrum Darmstadt)

19/08/2024, 17:20

Relativistic Heavy Ion collisions, QGP

Contributed Oral

The Compressed Baryonic Matter (CBM) experiment aims to explore the phase structure of strong- interaction (QCD) matter at large net-baryon densities and moderate temperatures by means of heavy-ion collisions in the energy range √sNN = 2.9 - 4.9 GeV. The CBM is under construction at the Facility for Antiproton and Ion Research (FAIR) and will be equipped with fast and radiation hard detector...

285. Chiral Symmetry in Nuclear Medium Observed in Pionic Atoms

Kenta Itahashi (RIKEN)

19/08/2024, 17:35

Hadron Physics and QCD

Invited Talk

We have deduced an order parameter of the chiral symmetry in nuclear medium by making precision spectroscopy of pionic Sn 121 atoms at the RIKEN RIBF. The binding energies and widths of the pionic states were measured, and the pion-nucleus interaction was accurately determined. The in-medium interaction exhibited enhanced isovector repulsive interaction due to the medium effect. Further...

111. Lattice QCD & Relativistic Heavy-Ion Collision Phenomenology

Jamie Karthein (Massachusetts Institute of Technology)

20/08/2024, 14:40

Relativistic Heavy Ion collisions, QGP

Invited Talk

In this talk, I will describe first-principles-based equations of state (EoSs) for QCD that serve as crucial input for simulations of hot, dense strongly-interacting matter. The first is solely informed by the fundamental theory by utilizing all available diagonal and off-diagonal terms that contribute to the Taylor expansion of the pressure up to $\mathcal{O}({\mu }_B^4)$. This allows for the...

90. Toward Extracting the Scattering Phase Shift from Integrated Correlation Functions in LQCD

Peng Guo

20/08/2024, 15:05

Hadron Physics and QCD

Contributed Oral

In this presentation, I will show how the difference of interacting and non-interacting integrated two-particle correlation functions in finite volume is related to infinite volume scattering phase shift through an integral weighted by a factor exp(-Et). The difference of integrated finite volume correlation functions converge rapidly to its infinite volume limit as the size of periodic box is...

36. Electromagnetic Probes of the QCD Plasma

Gojko Vujanovic (University of Regina)

22/08/2024, 14:40

Relativistic Heavy Ion collisions, QGP

Invited Talk

The penetrating nature of electromagnetic radiation makes it an ideal candidate to investigate the properties of the Quark-Gluon Plasma (QGP). A selection of recent developments in the theory and phenomenology of electromagnetic probes is discussed, with an emphasis towards how they can be employed to constrain transport phenomena in the QGP. The complementary between electromagnetic radiation...

91. (Zoom) Electromagnetic Fields in Relativistic Heavy Ion Collisions

Tewodros Wako (Aksum University)

22/08/2024, 15:05

Relativistic Heavy Ion collisions, QGP

Presentation with support

Understanding the Quark Gluon Plasma (QGP), whose existence was known from the combination of three observations, is the central goal of high energy nuclear physics. All the three observations came from studying elliptic flow, and the purpose of this research was to investigate the effect of electromagnetic field evolution created in relativistic heavy ion collision on the flow of identified...

150. (Zoom) Deciphering Yield Modification of Hadron-Triggered Semi-Inclusive Recoil Jets in Heavy-Ion Collisions

Yang He (Shandong University)

22/08/2024, 15:20

Relativistic Heavy Ion collisions, QGP

Contributed Oral

Jet quenching is considered a key signature for the creation of the Quark-Gluon Plasma (QGP) in relativistic heavy-ion collisions, and can also provide valuable insights into the QGP properties. One particular observable utilized to study the jet quenching effect is the nuclear modification factor ($I_{AA}$) for semi-inclusive hadron-triggered recoil jets, which provides access to jets of low...

227. Multi-Messenger Analysis of Jet Quenching Using Bayeisan Inference

Dr Lipei Du (McGill University)

22/08/2024, 15:35

Relativistic Heavy Ion collisions, QGP

Contributed Oral

The interaction of jets with the Quark-Gluon Plasma (“jet quenching”) provides incisive probes of QGP structure and dynamics, and extensive jet quenching measurements have been reported at RHIC and the LHC. However, the interpretation of such measurements in terms of properties of the QGP requires their comparison to realistic model calculations, which is computationally intensive. JETSCAPE is...

262. (Zoom) Heavy Quarks and Pre-Equilibrium Dynamics in Heavy-Ion Collisions

Sooraj Radhakrishnan (Kent State University/Lawrence Berkeley National Laboratory)

22/08/2024, 16:40

Relativistic Heavy Ion collisions, QGP

Invited Talk

Heavy quarks (c and b) are produced predominantly in initial hard-scatterings in heavy-ion collisions at RHIC and LHC, making them ideal probes of the matter created in heavy-ion collisions. Measurements at RHIC and LHC have shown heavy quarks acquire significant collective flow from the expanding Quark Gluon Plasma (QGP), and their yields show significant suppression compared to...

259. Probes of the Quark-Gluon Plasma with sPHENIX

Dr Megan Connors (Georgia State U.)

22/08/2024, 17:05

Relativistic Heavy Ion collisions, QGP

Contributed Oral

sPHENIX is a new detector at the Relativistic Heavy Ion Collider (RHIC), with state-of-the-art calorimeter, tracking, and forward detectors used to explore the properties and behavior of the strongly-coupled Quark Gluon Plasma (QGP) created in heavy-ion collisions. sPHENIX features qualitatively new capabilities never before available at RHIC, and a rare probes program intended to complement...

336. Precision Measurements of Net-Proton Number Fluctuations in Au+Au Collisions at RHIC

Nu Xu (LBNL)

22/08/2024, 17:20

Relativistic Heavy Ion collisions, QGP

Invited Talk

The main goal of the RHIC beam energy scan program (BES) is to study the strongly interacting nuclear matter phase structure and search for the possible QCD critical point in high-energy nuclear collisions. Over more than a decade, the scan (BES-I and BES-II) covered a wide range of collision energy, from the center of mass energy 3.0 GeV to 200 GeV corresponding to a wide range of...