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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
2023/5/26
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 ...
International team of LHC and Tevatron scientists announces first joint result
International team of LHC Tevatron scientists announces first joint result
2014/3/28
CHICAGO, USA AND GENEVA, SWITZERLAND — Scientists working on the world’s leading particle collider experiments have joined forces, combined their data and produced the first joint result from Fermilab...
Anisotropic flow at the LHC measured with the ALICE detector
Anisotropic flow ALICE detector LHC
2011/7/21
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
2011/7/20
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...
Jet reconstruction and jet background classification with the ALICE experiment in PbPb collisions at the LHC
Jet reconstruction jet background classification PbPb collisions LHC
2011/7/21
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...
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
2011/7/20
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...
Heavy-flavour production in Pb-Pb collisions at the LHC, measured with the ALICE detector
Pb-Pb collisions LHC ALICE detector Heavy-flavour production
2011/7/20
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...
LHCⅡ三聚体中叶绿素分子间能量传递的瞬态差异吸收光谱分析
光生物学 LHCII三聚体 瞬态差异吸收光谱 能量传递
2008/3/16
应用飞秒时间分辨差异吸收光谱技术对PSⅡ的LHCⅡ三聚体中的能量传递过程进行实验研究,分析得到三组能量传递的时间寿命组分：748 fs、3.28 ps、32.15 ps.其中748 fs的组分为单体内Chl b649分子经Chl b658将能量传递给Chl a665分子的过程；3.28 ps时间常量反映单体内能量从Chl a677向吸收更长波长的Chl a688分子的能量传递过程,以及Chl b6...
采用飞秒时间分辨荧光光谱技术在室温下用波长为495nm的光激发，研究了假根羽藻LHCⅡ的同质三聚体和异质三聚体这两种不同聚集形式蛋白复合物的光谱特性和传能特性.将实验获得的两样品的荧光光谱分别进行高斯解析，各得到5条亚谱带，并分析得出同质三聚体的四种特征Chl分子的光谱特性和异质三聚体的五种特征Chl分子光谱特性，另外还对两蛋白复合物的荧光光谱作了比较.利用Global优化处理方法，建立多指数拟合...
捕光复合物LHCⅡ的荧光动力学特性
2007/8/20
采用时间分辨荧光光谱技术,在273 K下用波长为507 nm的光激发对菠菜光系统Ⅱ捕光天线LHCⅡ的光谱特性和时间特性作了研究.将获得的荧光光谱进行高斯解析,得到6个光谱组分,反映了光谱特性：Chl a６６２６６０／６６１、Chl a/b６７２６７０／６７１、Chl a６８３.5６８０／６８１和Chl a６９９.9６９５.0,而中心波长为738.6nm、761.0 nm的光谱组分则可能对应着主发射...