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After the successful start of Run 3 in July this year, which featured proton-proton collisions at the record energy of 13.6 TeV, it was the turn of lead nuclei to circulate in the Large Hadron Collide...
Quarks are among the elementary particles of the Standard Model of Particle Physics. Besides up and down quarks, which are the basic building blocks of ordinary matter in the Universe, four other quar...
HL-LHC radiation protection robot passes first in-cavern test with flying colours（图）
HL-LHC 辐射防护机器人 洞内测试
2021/2/23
The CERN CRANEbot is seen here carrying a VAX module (centre of the image) inside the CMS cavern, as part of an operation test conducted in early February 2021. The robot, which has been developed at ...
Anisotropic flow at the LHC measured with the ALICE detector
Anisotropic flow ALICE detector LHC
2011/6/30
The ALICE detector at the LHC recorded first Pb-Pb collisions at 2.76 TeV in November and December of 2010. We report on the measurements of anisotropic flow for charged and identified particles. From...
The transverse momentum spectra, elliptic flow and interferometry radii for Pb-Pb collisions at the LHC are calculated in relativistic viscous hydrodynamics. For Glauber model initial conditions, we f...
Charged particle directed flow in Pb-Pb collisions at sqrt{s_NN} = 2.76 TeV measured with ALICE at the LHC
Charged particle directed flow Pb-Pb collisions sqrt ALICE
2011/6/27
Charged particle directed flow at midrapidity, |eta|<0.8, and forward rapidity, 1.7 < |eta|<5.1, is measured in Pb-Pb collisions at sqrt{s_NN} = 2.76 TeV with ALICE at the LHC. Directed flow is report...
Percolation of Color Sources and the Shear Viscosity of the QGP in Central A-A Collisions at RHIC and LHC Energies
Color Sources QGP Shear Viscosity A-A Collisions RHIC LHC
2011/6/21
The Color String Percolation Model (CSPM) is used to determine the shear viscosity to entropy ratio ($\eta/s$) of the Quark-Gluon Plasma (QGP) produced in Au-Au collisions at $\sqrt{s_{NN}}$ = 200 GeV...
Jet reconstruction and jet background classification with the ALICE experiment in PbPb collisions at the LHC
Jet reconstruction jet background classification PbPb collisions LHC
2011/6/21
For a quantitative interpretation of reconstructed jet properties in heavy-ion collisions it is paramount to characterize the contribution from the underlying event and the influence of background flu...
Heavy-flavour production in Pb-Pb collisions at the LHC, measured with the ALICE detector
Pb-Pb collisions LHC ALICE detector Heavy-flavour production
2011/6/20
We present the first results from the ALICE experiment on the nuclear modification factors for heavy-flavour hadron production in Pb-Pb collisions at sqrt{s_NN}=2.76 TeV. Using proton-proton and lead-...
LHC/ALICE及其光子探测
高能重离子碰撞 大型离子对撞机实验 光子谱仪 光子探测
2009/3/2
大型强子对撞机（LHC）上的大型离子对撞机实验（ALICE）将致力于TeV能区重离子碰撞，探测夸克退禁闭的新物质形态——夸克-胶子等离子体（QGP），探索宇宙诞生之初的物态性质。本文介绍其上的新一代电磁谱仪ALICE光子探测器（PHOS），它将用于铅-铅碰撞实验中测量直接光子和衰变光子产物，诊断夸克物质的电磁信号。束流测试结果显示，ALICE光子谱仪——PHOS将能够高效探测0.5～100GeV...