Baoyi Chen
(Tianjin University)
, Mrs
liu jiang
(Tianjin University)
17/08/2021, 14:00
3. 重离子物理
Poster
Transport and Langevin equations are employed to study hadronic medium effects on charmonium elliptic flows in heavy-ion collisions. In Pb-Pb collisions, the anisotropic energy density of the quark-gluon plasma (QGP) in the transverse plane is transformed into hadron momentum anisotropy after the phase transition. Charmonia with high transverse momentum p T are produced via the primordial hard...
Mr
Hao Liu
(USTC)
17/08/2021, 14:04
5. 粒子物理实验技术
Poster
As a vital component of the calorimetry of the Circular Electron Positron Collider (CEPC), the analog hadron calorimeter (AHCAL) uses scintillator, silicon photomultiplier (SiPM) and steel as medium to detect the hadrons. Its 70mm × 70mm × 40layer prototype is under construction. The readout system of AHCAL is designed to achieve high accuracy of the energy measurement, providing large channel...
Mr
文铎 赵
(贵州大学)
17/08/2021, 14:06
3. 重离子物理
Poster
Based on the framework of Color Glass Condensate (CGC), we study the hadron production with collinearly-improved unintegrated gluon distribution which is obtained by numerical solving the collinearly-improved next-to-leading Balitsky-Kovchegov equation. We calculate the multiplicity and transverse momentum distributions of the charged hadron in p+p and p+A collisions at RHIC and LHC energies....
Yunyun Fan
(高能所)
17/08/2021, 14:08
5. 粒子物理实验技术
Poster
The Institute of High Energy Physics of Chinese Academy of Sciences (IHEP, CAS) has designed two types of LGAD sensors, which are produced in the Novel Device Laboratory (NDL) and Institute of Microelectronics (IME) respectively. The sensors of the two foundries were irradiated with the neutron fluences of 0.8e15, 1.5e15 and 2.5e15 neq/cm2 in Institut Jozef Stefan (JSI). The timing resolution...
柯 米
(Central China Normal University)
17/08/2021, 14:12
3. 重离子物理
Poster
The study of baryon-baryon interactions is important to understand existence of strangelets and various exotic hadrons, and for modeling of astronomical objects such as neutron stars. A detailed knowledge of nucleon-nucleon (NN) potentials exists in literature, however very little is known about interactions between anti-nucleons. Similarly lack of scattering data for hyperon-nucleon (YN)...
Mr
Abdusalam Abdukerim
(Shanghai Jiao Tong University)
17/08/2021, 14:22
5. 粒子物理实验技术
Poster
Large scale of data will be produced in the PandaX-4T experiment. A fast I/O library is created to speed up the data processing, which converts the recorded waveforms from the PMTs into reconstructed events, with signals identified. Convenient event data visualization is required during the data analysis. We developed the PandaX-4T Event Viewer for this purpose. The tool is running on the...
Mr
Jin Wu
(CCNU)
17/08/2021, 14:24
3. 重离子物理
Poster
One of the main goals of RHIC beam energy scan (BES) program is to search for the signatures of QCD critical point in heavy-ion collisions. It is predicted that the local density fluctuations near the critical point exhibit power-law scaling, which can be probed with an intermittency analysis of the scaled factorial moments, $F_{q}(M)$, for charged particles. The power-law behavior of $q^{th}$...
Dr
Peng Ru
(South China Normal University)
17/08/2021, 14:26
3. 重离子物理
Poster
The physical origins of the collective phenomena observed from small to large systems is an important subject in relativistic heavy-ion physics. Collectivities can be established in two different ways in coherent and incoherent modes of particle emissions, respectively. Possible indications of the coherence in particle emission have been observed in Hanbury-Brown-Twiss (HBT) correlations (the...
迪 杨
(清华大学工程物理系近代物理研究所)
17/08/2021, 14:28
3. 重离子物理
Poster
Prompt charm parir production and prompt $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ cross section ratio are first measured in LHCb $p$Pb collisions at 8.16TeV. Z boson and prompt $D^{0}$ production are also measured at LHCb 8.16 TeV $p$Pb collisions. Results are compared with theory.
Prompt charm parir production observes 3 times DPS/SPS enhancement in $p$Pb compared to $pp$....
峰磊 刘
(Central China Normal University)
17/08/2021, 14:30
3. 重离子物理
Poster
We perform a systematic study on heavy quark dynamics in relativistic heavy-ion collisions.
The dynamical evolution of heavy quarks interacting with the quark-gluon plasma (QGP) is simulated via our new QLBT model, which improves the linearized Boltzmann transport (LBT) model by treating the QGP as a collection of quasi-particles.
To account for the non-perturbative interactions among quarks...
Dacheng Xu
(Tsinghua University)
17/08/2021, 14:32
5. 粒子物理实验技术
Poster
Photomultiplier tube~(PMT) voltage waveforms are the raw data of many neutrino and dark matter experiments. Waveform analysis is usually the first critical step of data processing. Targeting precise timing and charge extraction of photoelectrons, we evaluate several waveform analysis methods, among which direct demodulation, convolutional neural networks and fast Bayesian matching pursuits...
Prof.
Xiaomei Li
(China Institute of Atomic Energy)
17/08/2021, 14:36
5. 粒子物理实验技术
Poster
中国原子能科学研究院中高能物理团队通过国内外合作，结合自主研发，实现了光刻微结构气体探测器和新型电磁量能器等先进探测器的自主生产，性能指标达到国际标准。目前已经为原子能院院、高能所、近物所、中国散裂中子源、欧洲核子中心、美国BNL实验室、法国Saclay实验室等多个单位研制了探测器、读出和测试系统，对多个国家项目提供重要支撑。
Kaifeng Shen
(University of Science and Technology of China)
17/08/2021, 14:38
3. 重离子物理
Poster
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...
Mingrui Zhao
(China Institute of Atomic Energy)
17/08/2021, 14:40
3. 重离子物理
Poster
W and Z bosons are produced in the initial stage partonic hard scatterings in high energy hadronic and heavy-ion collisions. The measurement of W and Z bosons production in p-Pb and Pb-Pb collisions at the LHC energies provide constraints on the nuclear modified parton distribution function (PDF) in a phase-space region that is hardly accessed by previous experiments.
Production of W and Z...
仁杰 王
(University of Science and Technology of China)
17/08/2021, 14:42
3. 重离子物理
Poster
We study the lepton pair production in the ultra-peripheral collisions (UPC) in classical field approximation. We derived a general expression of impact parameter dependent differential cross section of lepton pair production including the transverse momentum and space dependent distribution of photons based on the quantum electrodynamics (QED) calculations. Our differential cross section in...
Shi Pu
(University of Science and Technology of China)
,
聪 易
(USTC)
17/08/2021, 14:44
3. 重离子物理
Poster
We have studied local spin polarization in the relativistic hydrodynamic model. Generalizing the
Wigner functions previously obtained from chiral kinetic theory in Ref. [1] to the massive case, we
present the possible contributions up to the order of ~ from thermal vorticity, shear viscous tensor,
other terms associated with the temperature and chemical-potential gradients, and...
Hui Liu
(Central China Normal University)
17/08/2021, 15:40
3. 重离子物理
Poster
Light nuclei, such as deuteron and triton, are loosely bound objects. Their yields are expected to be sensitive to baryon density fluctuations and can be used to probe the QCD critical point and the signatures of a first-order phase transition in heavy-ion collisions. In 2018, RHIC started the second phase of the beam energy scan program (BES-II). The STAR Fixed Target (FXT) program was...
静舒 李
(Sun Yat-Sen (Zhongshan) University)
17/08/2021, 15:42
5. 粒子物理实验技术
Poster
Liquid-based detectors are widely used in particle and nuclear physics experiments. Because fixed method is used to construct the geometry in detector simulations such as Geant4, it is usually difficult to describe the non-uniformity of the liquid in a detector. We propose a method based on geometry description markup language and a tessellated detector description to share the detector...
泽坤 贾
(USTC)
17/08/2021, 15:46
5. 粒子物理实验技术
Poster
Modern $e^{+}e^{-}$ colliders will reach an exceedingly high level of luminosity, like SuperKEKB, Super Charm-Tau Factory (SCTF) proposed by Russia, and Super Tau-Charm Facility (STCF) proposed by China. Under such a high event rate and additional beam background, the electromagnetic calorimeter should be capable of maintaining good energy and position resolution while dealing with pile-up...
Dr
Feng Wang
(Institute of High Energy Physics)
17/08/2021, 15:52
5. 粒子物理实验技术
Poster
In the Module Assembly Center (Beijing) for the CMS-HGCAL project, extensive studies have been performed for the silicon module assembly, along with the commissioning of major equipment, including a large-scale high-precision gantry system, a fully automated wire-bonding machine, an optical gauge for non-contact measurements in three dimensions. Recently a first 8-inch silicon module has been...
Mr
Xiaohao You
(IHEP)
17/08/2021, 15:54
5. 粒子物理实验技术
Poster
Due to the large size of 20 inch MCP PMT, the geomagnetic field have big influence on the performance of PMT, including time response and detect efficiency. A Permalloy shielding had been installed on all 20 inch MCP-PMT. Permalloy can change the direction of the magnetic field because of its higher permeability compared to ordinary steel. Since the magnetic field is guided through a low...
Ms
Yang He
(Shandong University)
17/08/2021, 15:56
3. 重离子物理
Poster
喷注淬火指喷注与由高能重离子对撞产生的夸克胶子等离子体(QGP)中的部分子相互作用从而损失能量的现象。RHIC能区已经在重核对撞，如金-金中心碰撞中观测到明显的喷注产额压低。此外，小系统(质-核对撞)中喷注淬火的研究也是当下热点之一。而在$\sqrt {s_{\rm NN}}=$ 200 GeV的锆-锆和钌-钌 ($\rm Ru^{44}_{96}+Ru^{44}_{96}$ and $\rm Zr^{40}_{96}+Zr^{40}_{96}$)碰撞能提供介于上述两种系统尺度之间的介质环境。我将讨论在同质异位素中以高横动量强子为触发的反冲半单举喷注的测量，用anti-k$_{T}$算法对带电粒子进行从0.2到0.4不同喷注锥体半径R的喷注重建，并用混合事例的技术对背景进行扣除。通过不同碰撞系统中喷注的比较，进一步了解部分子能量损失与初态能量密度、温度、热密介质大小的关系。
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)
17/08/2021, 16:00
3. 重离子物理
Poster
\begin{abstract}
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...
Mr
锦彪 顾
(陕西师范大学)
17/08/2021, 16:02
3. 重离子物理
Poster
We investigate the identified hadrons transverse momentum ($p_T$) spectra in proton-proton (pp)
collisions at 0.9, 2.76, 5.02, 7 and 13 TeV in the framework of Tsallis-blast wave (TBW) model. In this model, the Tsallis temperature and the average radial flow velocity of the system are common for all hadrons, while the degrees of non-equilibrium are common to all of the mesons and baryons...
Mustafa Anaam
(PHD student)
17/08/2021, 16:04
3. 重离子物理
Poster
The measurement of azimuthal correlations between two particles is a powerful tool to investigate the properties of strongly-interacting nuclear matter created in ultra-relativistic heavy-ion collisions. in particular, studying the near-side and away-side hadron yields associated with trigger particles can provide important information to understand both the jet-medium interaction and hadron...
鑫 吴
(中国科学技术大学)
17/08/2021, 16:08
3. 重离子物理
Poster
Relativistic heavy ions carry giant electromagnetic fields which can be equivalent to a field of quasireal and linearly polarized virtual photons. The vector meson production from linearly polarized photons possesses a distinctive signature in the asymmetries of the decay angular distributions. We compute the second-order modulation in azimuth as function of the vector meson (${\rho}_{0}$ and...
Ms
Xiujun Li
(USTC)
17/08/2021, 16:12
3. 重离子物理
Poster
Hypernuclei are bound nuclear systems of non-strange and strange baryons, i.e. nucleons and hyperons. As such, hypernuclei are correlated hyperon-baryon systems and therefore provide direct access to study the hyperon$-$nucleon (Y-N) interaction. Production of hypernuclei in collider systems provides an experimental avenue for studying the Y-N interaction. $\Lambda$ hypernuclei, such as...
Mr
Fan Si
(University of Science and Technology of China)
17/08/2021, 16:18
3. 重离子物理
Poster
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...
崔涵,
涵 崔
(University of Chinese Academy of Sciences)
17/08/2021, 16:24
1. TeV物理和超出标准模型新物理
Poster
This talk will present a search for Standard Model Higgs boson produced in association with high-energy photon via VBF production mode and another search for high mass resonance decaying to a Higgs boson and a photon with the ATLAS detector at $\sqrt{s}$=13 TeV. In both searches, the Higgs boson is required to decay to $b$-quark pairs. For the first search, $pp$ collision data with an...
Danning Liu
(Shanghai Jiao Tong University)
17/08/2021, 16:26
1. TeV物理和超出标准模型新物理
Poster
Di-boson process is one important test of the Standard Model Electroweak Symmetry Breaking (EWSB) and perturbative QCD, also the backgrounds for many new physics searches. The study shows the simulation and precise measurement of di-boson processes in pp collisions at √s=13TeV, using a dataset corresponding to an integrated luminosity of 139 fb^(-1) recorded with the ATLAS detector at the...
Jing Chen
(Shanghai Jiao Tong University)
17/08/2021, 16:28
1. TeV物理和超出标准模型新物理
Poster
Vector boson scattering processes are important for the current Run 2 and future runs of the Large Hadron Collider. The study of high-energy behaviours of VBS is crucial to understand the nature of the EWSB. At the LHC, the scattering of massive electroweak gauge bosons is accessible through the measurement of purely electroweak production of two jets and two gauge bosons. Among all the EW...
Mr
Qibin Liu
(Shanghai Jiaotong University)
,
Qibin Liu
(TDLI., Shanghai JiaoTong University)
17/08/2021, 16:30
1. TeV物理和超出标准模型新物理
Poster
The identification of massive particles decaying into bottom quark pairs is important for the physics program of the ATLAS experiment at the Large Hadron Collider. A neural network (NN) based double b-tagging algorithm named X→bb ̅ tagger is developed and calibrations of the tagger are performed using proton-proton collision data corresponding to 139〖fb〗^(-1) collected at a centre-of-mass...
Tianqi Hu
(Shanghai Jiao Tong University)
17/08/2021, 16:32
1. TeV物理和超出标准模型新物理
Poster
The presence of a permanent electric dipole moment (EDM) in any elementary particle implies Charge-Parity (CP) symmetry violation and thus could help explain the matter-antimatter asymmetry observed in our universe. Within the context of the Standard Model (SM), EDMs of SM particles are extremely small. However, in many beyond SM (BSM) theories, EDMs could be within experimental reach in the...
Hanqing Liu
(Shanghai Jiao Tong University)
17/08/2021, 16:36
1. TeV物理和超出标准模型新物理
Poster
There has been overwhelming astrophysical evidence that dark matter exists, though it has eluded direct detection so far. The Dark SHINE experiment in Shanghai aims to study the interaction between dark matter and ordinary matter using high-intensity single-electron beam. It will look for missing energy and momentum signals in electron collisions with a Tungsten target. In order to veto rare...
cheng chen
(Shanghai Jiao Tong University)
17/08/2021, 16:38
1. TeV物理和超出标准模型新物理
Poster
Studies of muon decay have helped established several parameters in the Standard Model. This decay is almost a pure weak decay and it allows for a high-precision test of the Standard Model and searches for new physics. Radiative muon decay (RMD) is particularly interesting because one of the Michel parameters, the eta parameter η, can be measured only via RMD. The branching ratio for RMD is...
Zhen Wang
(Shanghai Jiao Tong University)
17/08/2021, 16:40
1. TeV物理和超出标准模型新物理
Poster
This study has finished the implementation of NN pixel Clustering algorithm of Athena release 22 in the ATLAS Inner Detector Trigger analysis framework for the b-jet signature. An improvement in the tracking efficiency is observed in release 22 offline tracking. The study also helps to improve the tracking efficiency by modifying the truth level tracking information.
ZHANG Jiawei
17/08/2021, 16:42
5. 粒子物理实验技术
Poster
Top-up注入模式是加速器的一项新的束流注入模式，在保持对撞流强的近似恒定的同时，缩短了之前束流注入的死时间，有效提高了积分亮度。BESⅢ实验在2019年底首次使用了这项技术，在相同时间内积分亮度提高了近30%。但Top-up模式在束流注入过程中不可避免带来高的束流本底和噪声，影响数据质量。通过对Top-up模式下所取数据的束流本底和噪声的研究，我们结合在线触发和离线处理，设计了完善的离线过滤算法，并对BESIII离线数据处理流程进行了升级，在保证高积分亮度的同时，有效改善了数据质量。
Shuiting Xin
17/08/2021, 16:44
5. 粒子物理实验技术
Poster
A good identification of charged kaons is essential for the flavor physics and benefits the determination of jet flavor and jet charge at CEPC for Z-pole operation. To achieve these physics goals, a design of tracking system combining a silicon tracker and a drift chamber is proposed. The drift chamber could provide dN/dx measurements with cluster counting technique, as well as those of dE/dx....
mingming xia
(Tsinghua University)
17/08/2021, 16:46
5. 粒子物理实验技术
Poster
The increase of the leakage current of ABCstar chips for the upgrade of ATLAS inner tracker detector during exposure to ionizing radiation will lead to power consumption. Dedicated irradiation experiments for ABC130 chips(predecessor of ABCstar chips) have been performed at BNL and RAL. A dramatic increase of digital current with Total Ionizing Dose (TID) has been observed. Research regarding...
