高能所参加atlas合作组研究计划-powerpoint

童国梁,北京,2005.12.18-19TeV物理研讨会1ATLASstatusandfutureplan童国梁中国ATLAS联合组TeV物理研讨会（清华大学）2005.12.18-19童国梁,北京,2005.12.18-19TeV物理研讨会2Contents:1.TheStatusofLHCProject1.)Themainfeatures2.)Machine3.)DetectorandM&O4.)Grid-LCG2.TheActivitiesinATLAScollaborationbyChinesecluster1.)Detectorconstruction2.)Computing&softwaredevelopment3.)InternationalCollaborationonthedataanalysis4.)Topicsselection5.)Plan3.Summary童国梁,北京,2005.12.18-19TeV物理研讨会3超级强子对撞机（LHC）及其实验计划•在CERN建造的LHC是当今世界上能量最高的加速器，计划于2007年建成LHC主要设计指标物理运行开始时间2007年粒子对撞模式p-pPb-Pb最大束流能量（TeV）7.02.76(TeV/u)亮度能散0.10.1束流长度(cm)7.57.5束流半径(mm)亮度寿命(hr)106.7加速周期(s)1200注入能量(GeV)450.0177.4/u每个束团粒子数周长(km)26.659）（12−−scm34100.1×27102×）（310−31016−×31016−×10105.10×7104.9×童国梁,北京,2005.12.18-19TeV物理研讨会4LHC•√s=14TeV(7timeshigherthanTevatron/Fermilab)→searchfornewmassiveparticlesuptom~5TeV•Ldesign=1034cm-2s-1(102higherthanTevatron/Fermilab)→searchforrareprocesseswithsmallσ(N=Lσ)LHCb:pp,B-physics8-8$8-5$8:868/7;8-8;5$8$8/8-3=308-8-5=7=3;3=305+8-8-8-8$5$3*&5$8-3;8;308:868/8/8$8355578-867,303;8;8/8-8-8-7,55303;3;86$8/578-8-55558-307=8'8-8-308-8$5$7'8/3=3;8-8-8-8;8$5$7'8'838/7;8:8683558-3,//$5


8/86&303;5=8-8-558-([LVWLQJ30([LVWLQJ8/788;&/+&352-(&713RLQW81'(5*5281':25.6&063RLQW3RLQW3RLQW/+&¶%·$7/$63RLQW3RLQW6363RLQW3RLQW3RLQW3RLQW67&(OMU$/,&(([LVWLQJ6WUXFWXUHV/+&3URMHFW6WUXFWXUHV/+&([FDYDWHG6WUXFWXUHV/+&&RPSOHWHG6WUXFWXUHV&(/+&&RPSOHWHG6WUXFWXUHV&9(/+00$30,7,7,8-3*&7-777=/665+8-5$8$8-8-303;3=8;7;8/8$5$8-8:868/ALICE:heavyionsATLASandCMS:pp,generalpurposeATLASandCMS:pp,generalpurpose27kmringusedfore+e-LEPmachinein1989-2000Start:Summer2007pp童国梁,北京,2005.12.18-19TeV物理研讨会525nsEventrateinATLAS:N=Lxσ(pp)≈109interactions/sMostlysoft(lowpT)eventsInterestinghard(high-pT)eventsarerareÆverypowerfuldetectorsneeded童国梁,北京,2005.12.18-19TeV物理研讨会6ATLAS/CMS物理目标寻找质量范围在115mH1000GeV的标准模型预言的Higgs波色子寻找直到TeV质量的标准模型以上的物理(超对称性，q/lcompositeness,leptoquarks,W’/Z’,heavyq/l,Extra-dimensions,….)精密测量:--W质量--top质量,耦合和衰变性质--Higgs质量,自旋,耦合(如果Higgs粒子被找到的话)--B-physics(作为LHCb补充):CP破坏,稀有衰变,B0振荡--QCD喷注截面和as--etc.….在高密度下研究从强子物质到解囚禁夸克和胶子等离子体的相变（作为ALICE的补充）Etc.etc.…..这些物理目标是LHC实验计划最感兴趣的部分童国梁,北京,2005.12.18-19TeV物理研讨会7以ATLAS/CMS实验为例，Whichphysicsthefirstyear(s)?ExpectedeventratesatproductioninATLASatL=1033cm-2s-1ProcessEvents/sEventsfor10fb-1Totalstatisticscollectedatpreviousmachinesby‘07W→eν15108104LEP/107TevatronZ→ee1.5107107LEP1107104Tevatron1061012–1013109Belle/BaBar?gg~~ttbbHm=130GeV0.02105?Alreadyinfirstyear,largestatisticsexpectedfrom:--knownSMprocesses→understanddetectorandphysicsat√s=14TeV--severalNewPhysicsscenarios童国梁,北京,2005.12.18-19TeV物理研讨会8SearchfortheHiggsboson比较乐观ATLASATLASH→ZZ(*)→4l5σ≡discovery~1year~3years~4yearspresentlimit童国梁,北京,2005.12.18-19TeV物理研讨会9寻找超对称粒子和暗物质ATLASdiscoveryreachTimereachinsquark/gluinomass1month~1.3TeV1year~1.8TeV3years~2.5TeVultimateupto~3TeVThisparticle(neutralino)isagoodcandidatefortheuniversedarkmatterNeutralinomasscanbemeasuredto10%ÆSUSYdiscoveryandneutralinomassmeasurementatLHCcansolveproblemofuniversecolddarkmatter童国梁,北京,2005.12.18-19TeV物理研讨会10LHCMachine童国梁,北京,2005.12.18-19TeV物理研讨会11Conclusions(LynEvansattherecentCouncilWeek)Mainobjectives:-terminateinstallationinFebruary2007-firstcollisionsinsummer2007Theindustrialproductionofstandardcomponentsiscompatiblewiththisobjective.TherampingupofQRLactivitiesandmagnetinstallationiscriticaltomaintainthisschedule.AdditionalactionshavebeenimplementedtoensureproperQRLproductionandinstallationrates.Theinstallationandinterconnectionofcryomagnetshavestartedinthetunnel.Thecommissioningoftechnicalsystemswilltakeplaceintwoadjacentsectorsinparallel.Mainnextactions:-partialtestofsector7-8inautumn2005-commissioningtestofthetwofirstsectors(7-8and8-1)insummer2006-findexternalcollaboratorstohelpwithcommissioning.ÆWehaveallreasonstobebetterreadyaswell!童国梁,北京,2005.12.18-19TeV物理研讨会12ATLASsuperimposedtothe5floorsofbuilding40Detector童国梁,北京,2005.12.18-19TeV物理研讨会13Lastoverviewweek(October4th2004)童国梁,北京,2005.12.18-19TeV物理研讨会14ThelastBarrelToroidcoilwasmovedintopositionon25thAugustandthestructurewasreleasedfromtheexternalsupportson29thSeptember童国梁,北京,2005.12.18-19TeV物理研讨会15LHC实验的计算环境－LCG（Grid）Tier-1centerALICEATLASCMSLHCbASCC（台北）XXCNAF（意大利）XXXXPIC（西班牙）XXXCC-IN2P3（法国）XXXXGridKA（德国）XXXXRAL（英国）XXXXBNL（美国）XFNAL（美国）XTRIUMF（加拿大）XNIKHEF/SARA（荷兰）XXXNORDICDATAGRID（北欧）XXXCERNTier0ServesforALICE,ATLAS,CMSandLHCbComputingMoUwillsignedsoon童国梁,北京,2005.12.18-19TeV物理研讨会16Tier2Center包括中国在内的28个地点承诺建立Tier2计算中心：其中中国北京1个(覆盖ATLAS和CMS），捷克1个，法国2个，德国4个，印度2个（1个为CMS，另1个为Alice），意大利1个，日本1个，巴基斯坦1个，波兰1个，俄国1个、西班牙3个，瑞士1个，台北1个，英国4个，美国4个。NoComputing,Nophysics我国将由基金委/科技部签署这份谅解备忘录。与好多其他国家一样，中国的Tier2将覆盖LHC上的ATLAS和CMS两个实验。与其他Tier2区域计算中心一样，我国的Tier2也需要挂靠某一个Tier1计算中心，法国里昂IN2P3和CERN为首先考虑点。童国梁,北