Kaifeng Shen
(University of Science and Technology of China)
Heavy quarkonia are ideal probes of the Quark-Gluon Plasma (QGP). $ J/\psi$ is the most abundantly produced quarkonium state accessible experimentally and its suppression due to the color screening effect in hot and dense medium has been suggested as a signature of the formation of the QGP. Besides the screening effect, there are other mechanisms, such as the cold nuclear effects and charm...
梳苏 施
(Central China Normal University)
In this talk, we are going to review the recent experimental results of collectivity at RHIC-STAR.
Prof.
Sheng-Qin Feng
(China Three Gorges University)
Considering the magnetic field response of the QGP medium, we perform a systematical study of the chiral
magnetic effect (CME), and make a comparison with the experimental results for the background-subtracted
correlator H...
Mr
Fan Si
(University of Science and Technology of China)
Heavy quarks (charm and beauty) are considered ideal probes for the properties of the Quark-Gluon Plasma (QGP) created in heavy-ion collisions. Due to the large mass, they are produced in hard scattering processes at the early stage of the collisions before the QGP, so they can experience the whole evolution of the system. Theoretical partonic energy loss in the QGP shows mass-dependent due to...
Mr
anping huang
(University of Chinese Academy of Sciences)
The electromagnetic fields in heavy-ion collisions are important ingredients for many interesting phenomena, such as the Chiral Magnetic Effect (CME) and the directed flow v_1 of D^0 mesons. A critical and challenging problem in this direction is the dynamical evolution of the magnetic field in the medium. The magnetic fields from the initial colliding nuclei decay very fast in the vacuum....
Ms
He-Xia Zhang
(central China Normal University)
The chiral phase structure, mesonic properties and transport properties in a momentum anisotropic quark matter induced by the preferential expansion of medium are phenomenologically investigated based on the two flavor Nambu-Jona-Lasinio model.
The calculations of various transport coefficients have been performed using the kinetic theory in the relaxation time...
Mr
Tianyin Li
(South China Normal University)
We present a systematic quantum algorithm, which integrates both the hadronic state preparation and the calculation of dynamical light front correlation functions, to study the parton distribution functions (PDFs). As a proof-of-concept, we realize the first direct simulation of the PDFs in the 1+1 dimensional Nambu-Jona-Lasinio (NJL) model. We show the results obtained by numerical...
Wenda Guo
(Central China Normal University)
Measurements of the fraction of non-prompt ${\rm J/\psi}$, which is originated from beauty hadron, as a function of charged particle pseudorapidity density ${\rm d}N_{ch}/{\rm d}\eta$ in pp collisions at $\sqrt{s}$ = 13 TeV with ALICE at the LHC are reported. The ${\rm J/\psi}$ meson yield is measured at midrapidity (|y| < 0.9) via dielectron channel, for events selected based on the...
Ms
Man Xie
(Central China Normal University)
Under the assumption that a quark-gluon plasma droplet is produced in $p$+A collisions, $\gamma$-triggered hadron spectra are studied within a next-to-leading-order perturbative QCD parton model with the medium-modified parton fragmentation functions in $p$+Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV.
The initial conditions and space-time evolution of the small system of hot and dense...
Prof.
QINGJUN LIU
(BEIJING INSTITUTE OF PETRO-CHEMICAL TECHNOLOGY)
A Multi-Phase Transport Model (AMPT) for relativistic heavy-ion collisions depends on Zhang’s Parton Cascade (ZPC) package to simulate initial stage parton cascade. On the basis of ZPC, we have developed a software to exploit the powerful parallel processing capability of GPU when simulating the cascade. Named PCG (Parton Cascade on GPU), the software allows collision detection among...
Mr
Yu-Fei Liu
(Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE), Central China Normal University, Wuhan, Hubei, 430079, China)
Recent experiments have observed large anisotropic collective flows in high multiplicity proton-lead collisions at the Large Hadron Collider (LHC), which indicates the possible formation of mini quark-gluon plasma (QGP) in small collision systems.
However, no jet quenching has been confirmed in such small systems so far.
To understand this intriguing result, the system size scan experiments...
Ms
Wen-Jing Xing
(Central China Normal University)
While perturbative QCD can explain the color, mass and energy dependences of parton energy loss and jet quenching at large transverse momentum ($p_T > 6-8$ GeV) in heavy-ion collisions [1], a simultaneous description of heavy flavor suppression factor $R_{AA}$ and $v_2$ still remains a challenge at low and intermediate $p_T$ due to non-perturbative effects. In this work [2], we solve this...
Mr
Hao-Hao Peng
(University of Science and Technology of China)
Based on the Wigner function at local thermal equilibrium, we derive hydrodynamical quantities for a system of polarized spin-1/2 particles, including the particle number current density, the energy-momentum tensor, the spin tensor, and the dipole moment tensor. Comparing with ideal hydrodynamics without spin, we find additional corrections at first and second orders in gradient. The Wigner...
Dr
De-Xian Wei
(Guangxi University of Science and Technology)
Relativistic heavy-ion collisions provide opportunities for people to explore new material states Quark Gluon Plasma (QGP). As the limit of the QGP material generation system, the small collision system is a topic of great concern at present. Both theoretical and experimental results point out that the collective flow that characterizes the existence of QGP has a significant signal in the...
Mr
Lin Chen
(Central China Normal University)
A hot and dense, strongly interacting nuclear matter is created in high energy nucleus-nucleus collision experiments at RHIC and the LHC, known as the Quark-Gluon Plasma (QGP). Energetic partonic jets tend to lose energy when traversing through this coloured medium. In comparison with elementary proton-proton collisions, the suppression of high $p_T$ jet yields and enhancement of dijet...
仁杰 王
(University of Science and Technology of China)
The lepton pair production in ultra-peripheral collisions (UPC) is studied in the classical field approximation. We derive a general form of the cross section in terms of photon distributions which depend on the transverse momentum and coordinate based on the wave packet form of nuclear wave functions. Such a general form of the cross section in the classical field approximation contains the...
Wenbin Zhao
(Central China Normal University)
Light nuclei are the delicate probes of ultra-relativistic heavy ion collisions. Studying the light nuclei productions will help us to understand the nucleon emission source, the nucleosynthesis mechanism and the density fluctuations related to the critical point or first-order phase transition in heavy-ion collisions. In this talk, I will present our recent work about the beam energy...
Jian Zhou
(University of Science and Technology of China)
Recently, significant enhancements of $e^{+}e^{-}$ pairs at very low transverse momentum ($p_{T}$) were observed by the STAR collaboration in peripheral Au+Au collisions. The excess can be explained by photon-photon interactions induced by the extremely strong electromagnetic field produced by the fast-moving heavy ions. While such photon-photon interactions were traditionally studied in...
52.
Measurement of neutron skin thickness of $^{208}$Pb through parity-violating electron scattering
Jinlong Zhang
(Shandong University)
Determination of the neutron skin thickness which is defined as the difference of the root-mean-square radii of neutron and proton distributions inside a nucleus is of fundamental importance in nuclear physics and relativistic heavy-ion collisions. Neutron skin thickness is strongly sensitive to the density dependence of symmetry energy which is a key parameter of nuclear matter Equation of...
Chenlu Hu
(Institute of Modern Physics, CAS)
Collective flow has been commonly used for studying the properties of nuclear matter created in high-energy heavy-ion collisions, due to its high sensitivity on early stages of the collision dynamics. The first-order Fourier coefficient of azimuthal distributions of produced particles $v_1$, also called directed flow, has been analyzed for different particle species from the lightest mesons to...
112.
Measurements of jet quenching via hadron+jet correlations in pp and Pb-Pb collisions with ALICE
永珍 侯
(华中师范大学)
The quenching of jets in heavy ion collisions is one of the clearest signatures of the formation of a deconfined state of quarks and gluons, known as the Quark Gluon Plasma (QGP). The semi-inclusive measurement of jets recoiling from a high-𝑝T hadron (hadron+jet) in heavy ion collisions uniquely enables the exploration of medium-induced modification of jet production and acoplanarity over a...
Yuanyuan Zhang
(Central China Normal University)
Large angle gluon radiations induced by multiple parton scatterings contribute to dijet production in deeply inelastic scattering off a large nucleus at the Electron-Ion Collider. Within the generalized high-twist approach to multiple parton scattering, such contributions at the leading order in perturbative QCD and large Bjorken momentum fraction $x_B$ can be expressed as a convolution of the...
xinye peng
(Central China Normal University)
In this contribution, the final measurements of beauty production using beauty-decay electrons, non-prompt $\mathrm{D}^+$, $\mathrm{D}^0$, $\mathrm{D}_{s}$ and beauty-tagged jets in pp collisions at $\sqrt{s}$ = 5.02 TeV, which provide very important tests of perturbative QCD calculations.
Measurements of beauty-tagged jet production down to $p_{\rm T}$ = 10 GeV/$c$ in p--Pb collisions at...
Dr
Wai Kin Lai
(South China Normal University)
At the EIC, semi-inclusive production of hadrons and jets in deep-inelastic scattering (DIS) are crucial processes to obtaining information about the polarized TMD PDFs of the proton. Notably, recently it was proposed that the coupling of the proton PDFs and the T-odd part of the TMD jet function in semi-inclusive jet production in DIS can provide important information on the proton PDFs, such...
Zhilei SHE
(China University of Geosciences)
The production of $\rm{^3_\Lambda H}$ and $\rm{{^3_{\overline \Lambda}\overline H}}$, as well as $\rm{^3H}$, $\rm{{^3\overline H}}$, $\rm{^3He}$, and
$\rm{{^3\overline {He}}}$ are studied in central collisions of
isobars $_{44}^{96}$Ru + $_{44}^{96}$Ru
and $_{40}^{96}$Zr + $_{40}^{96}$Zr
at $\sqrt{s_{\rm{NN}}}=200$ GeV, using the dynamically constrained phase-space coalescence model...
Zuowen Liu
(Central China Normal University)
RHIC-STAR能量扫描计划的主要物理动机之一是确定核物质在高重子密度区的状态方程（EOS）。格点量子色动力学（Lattice QCD）预言从强子相到部分子相的一级相边界终点是QCD临界点。直接流（$v_{1}$）是末态粒子在动量空间方位角分布的傅里叶展开式中的一阶系数。根据理论计算，直接流对于碰撞系统早期演化的状态方程很敏感，可作为QGP相结构研究的良好探针。STAR已经完成了对撞能量$\sqrt{s_{NN}}$= 7.7-200 GeV的一期能量扫描计划（BES-I），和固定靶3 GeV中直接流的测量。其中在$\sqrt{s_{NN}}$= 10-20 GeV观察到净质子和净$\Lambda$超子的直接流斜率（$dv_{1}/dy$）在中快度区有极小值。根据流体力学模型和一级相变的计算，净重子在中心快度区直接流的斜率随能量分布的极小值被认为是一级相变的标志。在固定靶3...
IRFAN SIDDIQUE
(University of Science and Technology of China)
In this work we study the space-average electromagnetic (EM) fields weighted by the energy density in the central regions of heavy ion collisions. These average quantities can serve as a barometer for the magnetic-field induced effects such as the magnetic effect, the chiral separation effect and the chiral magnetic wave. Comparing with the magnetic fields at the geometric centre of the...
Shi Pu
(University of Science and Technology of China)
We discuss a puzzle in relativistic spin hydrodynamics; in the previous formulation the spin source from the antisymmetric part of the canonical energy-momentum tensor (EMT) is crucial. The Belinfante improved EMT is pseudo-gauge transformed from the canonical EMT and is usually a physically sensible choice especially when gauge fields are coupled as in magnetohydrodynamics, but the Belinfante...
Mr
Li'Ang Zhang
(Central China Normal University)
Status and Plan of the ALICE Inner Tracking System Upgrade
Li-Ang Zhang (for the ALICE Collaboration)
Central China Normal University
The ALICE experiment is undergoing a major upgrade of its apparatus, planned for installation in the second long LHC shutdown (LS2) in the years 2018 – 2021. The replacement of the existing Inner Tracking System (ITS) with a completely new ultra-light...
Ms
Zhou Yingjie
(Central China Normal University)
Exploring the QCD phase diagram and searching for the QCD critical point are among(st) the main goals of heavy-ion collision experiments. The yields and particle ratios of strange hadrons provide information about the phase diagram and particle production mechanisms in these collisions. The RHIC Beam Energy Scan program covers a wide range of energies to explore the transition from a hadronic...
Pengyao Cui
(Central China Normal University)
Recent ALICE results on the yield of (multi-)strange particles in pp and p--Pb collisions reveal the possibility that similar strange quark production mechanisms could be present in all collision systems.
The $p_{\rm T}$-dependent baryon-to-meson yield ratio in hadronic and nuclear collisions is sensitive to the collective expansion of the system, the partonic recombination into hadrons, the...
Ms
Xiang-Pan Duan
(Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China)
Jet mass is expected to be sensitive to jet quenching in the hot QCD matter created in relativistic heavy-ion collisions. The recent ALICE measurement of the jet mass in central Pb+Pb collisions is consistent within uncertainties with p–Pb reference measurements [1].
The jet mass distribution is investigated in p+p and Pb+Pb collisions at $\sqrt{s_{_{\rm NN}}}$ = 2.76 TeV using a multiphase...
Mingrui Zhao
(China Institute of Atomic Energy)
Anisotropic flow phenomena is a key probe of the existence of Quark-Gluon Plasma. The second and the third order anisotropic flow, V2 and V3 , are mostly determined by the corresponding initial spatial anisotropy coefficients, e2 and e3 , in the initial density distribution. In addition to their dependence on the same order initial anisotropy coefcient, higher order anisotropic ow, Vn (n > 3),...
Prof.
Luan Cheng
(Dalian University of Technology)
We study tetraquark within the framework of fratual theory. According to the self-similarity of the physical laws of the system at different scales, we considered the system from the quark scale and the meson scale respectively, and calculated the probability and entropy of meson under the influence of internal tetraquark interaction. The meson interaction factor q can be derived by...
Dr
shiyong chen
(Huanggang Normal University)
We present the first theoretical study of medium modifications of the global geometrical pattern, i.e., transverse sphericity (S_{\perp }) distribution of jet events with parton energy loss in relativistic heavy-ion collisions. In our investigation, POWHEG + PYTHIA is employed to make an accurate description of transverse sphericity in the p + p baseline, which combines the next-to-leading...
良 张
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
Even though lots of $\Lambda$-hypernuclei have been found and measured, hypernuclei consisting of multi-strangeness, such as $\Omega$-hypernuclei, are not yet discovered. The studies of multi-strangeness hypernuclei help us further understand the interaction between hyperons and nucleons. Recently the HAL-QCD Collaboration calculated $\Omega N$ and $\Omega\Omega$ interactions by lattice...
Ye-Yin Zhao
(Central China Normal University)
Quark-antiquark pair (or dijet) production at the electron-ion collider (EIC) has been argued to be one of most important processes that allowing to access the Weizs\"acker-Williams (WW) gluon distributions at small $x$ limit. Within the framework of Color Glass Condensate (CGC) effective field theory (EFT), we calculated the dijet cross sections and the azimuthal correlations by including the...
淳正 王
(Shanghai Institute of Applied Physics)
各向异性流对电荷不对称性的依赖是重离子碰撞中寻找手征磁波(CMW)的重要工具。然而各类背景效应，如与集体流耦合在一起的局部电荷守恒（LCC）等，在测量中还没有被明确地消除。我们借助于两个模型，即具有初始四极矩的AMPT模型和包含LCC的Blast Wave模型，分别研究了LCC和CMW所导致的$A_{ch}$与椭圆流之间的相关性。在此基础上，我们首次提出利用形状事件选择(Event Shape Engineering,ESE）技术来区分CMW研究中的背景和信号。这种方法在实验研究CMW时是非常理想的，可为理解夸克胶子等离子体的电荷相关集体运动提供了更多的见解。
