Quark Matter 2023

Session

Chirality

5 Sept 2023, 08:30

Hilton of the Americas, 1600 Lamar, Houston, Texas, 77010, USA

Conveners

Chirality: (1)

• Dirk Rischke

Chirality: (2)

• huan huang

864. Hyperon Polarization in Heavy Ion Collisions from STAR

Xingrui Gou

05/09/2023, 08:30

Chirality

Oral

The observation of hyperon polarization has revealed the existence of large vorticities in the medium created by heavy-ion collisions. Global polarization indicates vorticities perpendicular to the reaction plane due to the system's orbital angular momentum. The difference of global polarization between $\mathrm{\Lambda }$ and $\overline{\mathrm{\Lambda }}$ hyperon can provide essential insights into the late-stage...

456. Search for anomalous chiral effects in heavy-ion collisions with ALICE

Chunzheng Wang (Fudan University (CN))

05/09/2023, 08:50

Chirality

Oral

The interplay of the chiral anomaly and the strong magnetic or vortical field created in the off-central heavy-ion collisions can give rise to anomalous chiral effects in the quark--gluon plasma. These include the Chiral Magnetic Effect (CME), the Chiral Magnetic Wave (CMW) and the Chiral Vortical Effect (CVE). The study of these novel phenomena is of fundamental significance since they may...

703. QGP vortex rings as a new probe for jet-induced medium response and longitudinal dynamics

Willian Matioli Serenone (Universidade de São Paulo)

05/09/2023, 09:10

Chirality

Oral

Hydrodynamics provides quantitative descriptions of various flow measurements in heavy-ion collisions, suggesting the strongly-coupled nature of the hot QCD matter. A ubiquitous phenomenon in fluid dynamics is the formation of vortex rings. In heavy-ion collisions, different conditions can give rise to toroidal vortex structure in the QGP medium, such as the medium's response to jet...

353. New Insights into Global Spin Alignment in Heavy-Ion Collisions: Measurements of $\varphi$, $\omega$, ${\rho }^0$, and $J/\psi$ at STAR

Baoshan Xi (Fudan University)

05/09/2023, 09:30

Chirality

Oral

The global spin alignment of particles produced in heavy-ion collisions can reveal valuable information about the strong force field and the properties of the quark-gluon plasma. The STAR collaboration recently observed a large global spin alignment of $\varphi$-mesons in Au+Au collisions using the data from the first phase of the RHIC Beam Energy Scan program (BES-I) [1]. This cannot be...

428. A new stable and causal theory of viscous chiral hydrodynamics

Nick Abboud (University of Illinois at Urbana-Champaign)

05/09/2023, 09:50

Chirality

Oral

Over the past decade, considerable research effort has focused on investigating macroscopic consequences of anomalies in quantum field theories. In particular, chiral matter is expected to exhibit novel transport phenomena arising from the interplay between quantum anomalies and electromagnetic and vortical fields [1]. In order to study these effects in fluid systems like the quark-gluon...

868. Search for the Chiral Magnetic and Vortical Effects Using Event Shape Variables in Au+Au Collisions at STAR

ZHIWAN XU

05/09/2023, 10:10

Chirality

Oral

Effects from quark chirality in heavy-ion collisions probe the topological sector of Quantum Chromodynamics, where parity and charge-parity symmetries are violated locally in strong interactions. However, the experimental observables for the chiral magnetic/vortical effect (CME/CVE) are dominated by elliptic flow and nonflow backgrounds. Recent STAR isobar data revealed a substantial...

635. Exact Polarization of Particles of Any Spin at Global Equilibrium

Andrea Palermo

06/09/2023, 14:20

Chirality

Oral

The polarization of the $\mathrm{\Lambda }$ particle offers the unique opportunity to study the hydrodynamic gradients in the Quark-Gluon Plasma formed in heavy-ion collisions. However, the theoretical formula commonly used to calculate polarization is only a linear order expansion in thermal vorticity and neglects higher-order terms. Here, we present an exact calculation at all orders in (constant)...

114. Sphaleron damping and effects on normal and anomalous charge transport in high-temperature QCD plasmas

Lillian de Bruin

06/09/2023, 14:40

Chirality

Oral

We modify the hydrodynamic equations of a relativistic chiral plasma to account for dissipative effects due to QCD sphaleron transitions. By analyzing the linearized hydrodynamic equations, we show that sphaleron transitions lead to nontrivial effects on vector and axial charge transport phenomena in the presence of a magnetic field. Notably, dissipative effects of sphaleron transitions lead...

339. Flow and hyperon polarization at RHIC BES from multi-fluid dynamics

Dr Iurii Karpenko (FNSPE CTU in Prague)

06/09/2023, 15:00

Chirality

Oral

We present a study of flow and hyperon polarization observables at RHIC BES energies in a MUlti Fluid simulation for Fast IoN collisions (MUFFIN) model. MUFFIN is based on a multi-fluid approach to relativistic heavy-ion collisions, and treats the initial stage of heavy-ion reaction as mutual inter-penetration of baryon-rich fluids. It is implemented from scratch with the use of a versatile...

292. Impact of globally spin-aligned vector mesons on the search for the chiral magnetic effect in heavy-ion collisions

Diyu Shen

06/09/2023, 15:20

Chirality

Oral

In high-energy heavy-ion collisions, the chiral magnetic effect (CME) is predicted to arise from the interplay between the chirality imbalance of quarks in the nuclear medium and the intense magnetic field, and will cause a charge separation along the magnetic field direction. While the search for the CME is still ongoing in experiments at Relativistic Heavy Ion Collider (RHIC) and the Large...

358. Post-blind Analysis of Isobar Collisions and Background-controlled Upper Limit on the Chiral Magnetic Effect from STAR

Mr Yicheng Feng (Purdue University)

06/09/2023, 15:40

Chirality

Oral

The STAR Collaboration has reported results from a blind analysis of isobar collisions (${}_{44}^{96}\text{Ru}+{}_{44}^{96}\text{Ru}$, ${}_{40}^{96}\text{Zr}+{}_{40}^{96}\text{Zr}$) at $\sqrt{s_{\mathrm{NN}}}=200$ GeV on the search for the chiral magnetic effect (CME). Significant differences were observed in the measured multiplicity ($N$) and elliptic anisotropy ($v_2$) between the two...