The 4th China LHC Physics Workshop (CLHCP 2018)

Session

Heavy Ion Physics

5

20 Dec 2018, 14:00

CCNU

Conveners

Heavy Ion Physics: Heavy Ion Physics

• Guo-Liang Ma (Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China)

Heavy Ion Physics: Heavy Ion Physics

• 笙琴 冯 (三峡大学理学院)

Contribution list Timetable

139. Tale of coherent photon products: from UPC to HHIC

王妹 查 (中国科学技术大学近代物理系)

20/12/2018, 14:00

Heavy Ions

The coherent photon-nucleus and photon-photon interactions has been studied in detail to probe the gluon distribution in nucleus and to test QED via relativistic heavy-ion collisions. These kind of interactions are traditionally thought to be only exist in ultra-peripheral collisions (UPC), where there is no hadronic interactions. Recently, significant excess of $J/\psi$ yield and dielectron...

94. Measurements of heavy-flavour decay leptons in Pb-Pb and Xe-Xe collisions with ALICE at the LHC

ZUMAN ZHANG (ccnu)

20/12/2018, 14:15

Heavy Ions

In this talk, measurements of RAA and v2 of open heavy-flavour hadrons via semi-leptonic decays to electrons at mid-rapidity and muons at forward rapidity in Pb-Pb collisions at LHC energies will be discussed. The progresses on the analysis of the production and anisotropy of electrons from beauty-hadron decays will be also discussed. In addition the RAA of heavy- flavour hadron decay leptons...

93. Non-strange and strange D-meson and charm-baryon production in heaavy-ion collisions measured with ALICE at the LHC

xinye peng (Central China Normal University)

20/12/2018, 14:30

Heavy Ions

Heavy quarks (charm and beauty) are a powerful probe of the Quark-Gluon Plasma (QGP) formed in high-energy heavy-ion collisions. They are produced in hard scattering processes on a timescale shorter than the QGP formation time and experience the whole system evolution. The measurement of the nuclear modification factor ($R_{\rm AA}$) of open heavy flavours can provide important information...

131. Open heavy flavor production in pPb collisions at LHCb

Dr Jiayin Sun (Tsinghua University)

20/12/2018, 14:45

Heavy Flavor

Production of open heavy flavor in pPb collisions provides insight on the cold nuclear matter effects, and acts as a crucial reference measurement to AA collisions in order to disentangle cold nuclear matter effects from the QGP-related effects. The LHCb experiment has measured the production cross section of open charm and beauty hadrons in proton-lead collisions in the forward rapidity...

84. Nuclear modification of full jets and jet structure in PbPb collisions at the LHC

Ning-Bo Chang (Xinyang Normal Univerisity)

20/12/2018, 15:00

Heavy Ions

With our coupled jet-fluid model [1, 2, 3], we study the nuclear modifications of full jets and jet structures for single inclusive jet, dijet and gamma-jet events in Pb+Pb collisions at both 2.76 TeV and 5.02 TeV. The evolution of full jet shower is studied via a set of coupled transport equations including the effects of collisional energy loss, transverse momentum broadening and...

70. Measurements of charged jet production and modification in ALICE

Ms Yongzhen HOU (presentation)

20/12/2018, 15:15

Heavy Ions

A jet is a spray of collimated hadrons originated in the fragmentation of an energetic parton. The cross section measurement provides a good test for pQCD calculations, and jet production in pp collisions constitutes a reference for jet quenching study in nucleus-nucleus collisions. In addition, the measurements in different multiplicity intervals will provide insights to understand ...

79. Jet-like Correlations in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV in STAR

Mr Kun Jiang (University of Science and Technology of China)

20/12/2018, 15:30

Heavy Ions

Hard scattered partons lose their energy when propagating through the hot dense medium created in relativistic heavy ion collision. Jets are excellent probes to study parton energy loss mechanisms. Experimentally high transverse momentum ($p_T$) trigger particles are taken as proxies of jets. Di-hadron correlation measurements in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV will be presented in...

87. Gluon emission from heavy quarks in dense nuclear medium

乐 张 (Hubei Normal University)

20/12/2018, 15:45

Heavy Ions

We study the medium-induced gluon emission process experienced by a hard jet parton propagating through dense nuclear matter in the framework of deep inelastic scattering off a large nucleus. We work **beyond collinear rescattering expansion and soft gluon emission limit**, and derive **a closed formula for medium-induced single gluon emission from a heavy or light quark jet** interacting...

110. Simple analytical solutions of relativistic hydrodynamics with longitudinal accelerating flow

Ze-Fang Jiang (Central China Normal University)

20/12/2018, 16:30

Heavy Ions

We will present new, exact, finite solutions of relativistic hydrodynamics for longitudinally expanding fireballs for arbitrary constant value of the speed of sound (CKCJ). These new solutions generalize earlier, longitudinally finite, exact solutions, from an unrealistic to a reasonable equation of state, characterized by a temperature independent (average) value of the speed of...

136. Anisotropic flow of identified particles in Pb--Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV with ALICE

Ya Zhu (CCNU)

20/12/2018, 16:45

Heavy Ions

Anisotropic flow plays a critical role in understanding the properties of the quark-gluon plasma. The elliptic and triangular flow of identified particles, including $\pi^{\pm}$, $\rm K^{\pm}$, $\rm p +\bar{p}$, $\phi$, $\rm K^{0}_{S}$, $\Lambda + \bar{\Lambda}$, $\Xi^{-}+\bar{\Xi}^{+}$ and $\Omega^{-}+\bar{\Omega}^{+}$ were measured by ALICE for Pb--Pb collisions at $\sqrt{s_{\rm NN}}$ =...

109. Longitudinal decorrelations of anisotropic flow and $\gamma$-Jet induced rapidity even direct flow

Xiang-Yu Wu (Central China Normal University)

20/12/2018, 17:00

Heavy Ions

We perform a systematic study on the decorrelation of anisotropic flows along the pseudorapidity in relativistic heavy-ion collisions at the LHC and RHIC energies.The dynamical evolution of the QGP fireball is simulated via the CLVisc (3+1)D hydrodynamics model, with the fully fluctuating initial condition from AMPT model. Detailed analysis is performed on the longitudinal decorrelations of...

96. Machine Learning rediscovers flow in simulated data of heavy ion collisions

Mr Ziming Liu (Peking University)

20/12/2018, 17:15

Heavy Ions

We apply principal component analysis(PCA) to simulated data of relativistic heavy-ion collisions. Unlike traditional Fourier methods, we apply PCA directly to single particle distribution. Interesting patterns are identified by PCA as eigenmodes, from which we define new flow observables $v_n^{'}$ compared to traditional ones $v_n$. The eigenmodes are very much like traditional Fourier bases,...

91. Spectra and flow of light nuclei in relativistic heavy ion collisions at energies available at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider

Wenbin Zhao (school of physics Peking Uniersity)

20/12/2018, 17:30

Heavy Ions

Within the framework of the coalescence model based on the phase-space distributions of protons and neutrons generated from the {{\tt iEBE-VISHNU}} hybrid model with {{\tt AMPT}} initial conditions, we study the spectra and elliptic flow of deuterons and helium-3 in relativistic heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) and the Larger Hadron Collider (LHC). Results...

137. Properties of light (anti)nuclei production in Pb-Pb collisions at LHC energy

Mr Zhilei SHE (China University of Geosciences(wuhan))

20/12/2018, 17:45

Heavy Ions

The Large Hadron Collider (LHC) at the European Organization for Nuclear Research(CERN) can provide a good experimental condition to study the production of light (anti) nuclei and to understand the underlying physical mechanisms for collision physics.The centrality dependence of light (anti)nuclei and (anti)hypertriton production in Pb-Pb collisions at LHC energy are investigated using the...