friday the 18th of may, 2001us cms physics j.g. branson1 physics in (us) cms james g. branson uc san...
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Friday the 18th of May, 2001US CMS Physics J.G. Branson3 Luminosity for a 5 Higgs Signal 5 sigma signal possible in one year of running from 100 GeV to 600 GeV. From 150 to 450, 5 sigma effect could come in a few months. WW and ZZ (*) using leptons One area in which CMS claims to be be significantly better than Atlas is in the GeV Higgs mass region. This might also be the region accessible to the Tevatron. Hardware trigger and software must be ready at the beginning of running.TRANSCRIPT
Friday the 18th of May, 2001
US CMS Physics J.G. Branson 1
Physics in (US) CMSPhysics in (US) CMS
James G. BransonUC San Diego
US CMS Collaboration MeetingUS CMS Collaboration MeetingRiverside CARiverside CA
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US CMS Physics J.G. Branson 2
LHC Commissioning ScheduleLHC Commissioning Schedule
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US CMS Physics J.G. Branson 3
Luminosity for a 5Luminosity for a 5 Higgs Signal Higgs Signal 5 sigma signal possible in one year of running from 100 GeV to 600 GeV.From 150 to 450, 5 sigma effect could come in a few months.
WW and ZZ(*) using leptonsOne area in which CMS claims to be be significantly better than Atlas is in the 100-150 GeV Higgs mass region.
This might also be the region accessible to the Tevatron.
Hardware trigger and software must be ready at the beginning of running.
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US CMS Physics J.G. Branson 4
SUSY in one weekSUSY in one week High energy can pay off immediately.
Squark gluino search starts the first day of running.
Missing energy plus jets.
Not the CMS strong suit.
Need tracker to measure jets and missing energy well.
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US CMS Physics J.G. Branson 5
Developments Last YearDevelopments Last Year Physics Reconstruction and Selection (PRS): new project in CMS; along with CCS and TriDAS (online): CPT
Joint Technical Board
Core Computing &
Software
Physics Reconstruction
& Selection
TRIDAS(Online farm)
Reconstruction Group. RPROM (Stephan Wynhoff)
Simulation Group. SPROM (Albert De Roeck)
Architecture Task Force. CAFE (Jim Branson)
Paris Sphicas Sergio CittolinMartti PimiaDavid Stickland
…
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Physics Reconstruction & Selection Physics Reconstruction & Selection Consists of four groups
(ECAL) Electron/Photon C. Seez Muons U. Gasparini/D. Acosta (HCAL) Jet/Missing ET S. Eno/S. Kunori (Tracker) b/(vertex) M. Manelli/L.Silvestris
Charge: evaluate full chain (from Lvl-1 to offline) of physics selection for CMS.
First priority (till end 2002): the HLT: study, design & implement algorithms and code to provide the rejection/efficiency needed for CMS physics plan
Then turn to Physics TDR (two volumes) for ~ 2004 Responsibility for detector reconstruction, calibration and simulation software.
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US CMS Physics J.G. Branson 7
Developments Last YearDevelopments Last Year New LHC schedule new date for DAQ TDR
First beams in early 06, first physics in Aug 06 Submission date was always set to T0(LHC)-3.5 yrs.
With new schedule, submission goes to end (Nov 30) 2002
Schedule & Milestones: Unchanged, especially for the HLT/PRS part(s)
What gets delayed is decisions on technologies to use, etc., but not the results of the studies.
However, with another year’s technology with us, we can expect that most of the data transfer issues are no longer with us, so we just concentrate on
(a) the algorithm itself and (b) the CPU needed
Computing TDR also end 2002Physics TDR ~2004
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US CMS Physics J.G. Branson 8
High Level TriggerHigh Level Trigger High Level Trigger: included in “PRS”
Defining “Level-2” as anything doable without tracking information, Level-2 is ~ complete
Level 2.5 might include pixels Level 3 uses the tracker Level 4 includes physics analysis
High Level Trigger: (from Paris) “Level-2” equivalent algorithms in place Now working on “Level-3”
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US CMS Physics J.G. Branson 9
US CMS S&C ProjectUS CMS S&C Project Management staff selected.
Lothar Bauerdick L1 Lucas Taylor deputy Vivian O’Dell L2 UF Ian Fisk L2 CS
US Project is a model for CMS and CERN plan.
This is your user facility.
Core software engineers job is 25% service.
Total Project Cost(with escalation)
0.00
4.00
8.00
12.00
16.00
$M
Mgmt Reserve 0.42 0.57 0.68 1.23 1.48 1.60 1.55
Tier2 FTE 0.40 0.41 0.64 0.66 0.90 1.16 1.19
Tier2 Hardware 0.28 0.48 0.63 1.22 1.97 2.03 1.49
CAS FTE 1.58 1.79 2.01 2.24 2.31 2.38 2.45
Tier1 FTE 1.19 1.87 2.35 4.32 5.42 6.50 6.32
Tier1 Hardware 0.55 0.81 0.81 3.52 3.80 3.56 3.70
Project Office 0.16 0.33 0.34 0.35 0.36 0.37 0.38
FY2001 FY2002 FY2003 FY2004 FY2005 FY2006 FY2007
OperationsImplementation
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US CMS Physics J.G. Branson 10
CMS “Physics” MeetingsCMS “Physics” Meetings Meetings made available to us
All PRS meetings at 4:30 Geneva time on either Tuesday or Wednesday (biweekly).
RPROM, SPROM on Mondays. CAFÉ (Architecture) and DAQ Thursday.
Please attend and participate. Minutes and slides available.
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US CMS Physics J.G. Branson 11
New US Meeting FormatNew US Meeting Format Agreed at ASCB meeting to combine physics and Users meetings into monthly (slightly longer) sessions.
Brief reports from User facility Core Software S&C Project Management and ASCB US component of PRS groups
JetMet (HCAL) Muon (Muon) e Gamma (ECAL) B-Tau (Tracker)
Talks Discussion Forum…
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US EffortUS Effort US has a strong and growing involvement in the muon PRS group.
JetMET proceeding but needs more US effort. Detector group is responsible according to
spokesman. This is mainly a US responsibility. We need new effort from HCAL groups to add to
current Maryland work. Some e/ work, but, would like to play a bigger role in the US.
Time to move into photons? Tracker group growing in US.
Should we go into b/ or use tracker in other PRS groups?
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US CMS Physics J.G. Branson 13
Tracker Needed for EverythingTracker Needed for Everything Use in muon measurement long part of the CMS plan.
Material in tracker very important in e/ analysis. Special tracking for electrons.
Large fraction of energy radiated. Conversion of radiated photons is hurting.
Photon conversion important. 0 rejection.
Many charged particles in jets spiral into endcap.
Limits jet energy resolution Limits ET resolution.
Tracker (b/) group large and powerful. The definition of Level 3.
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Analysis Center(s) in the USAnalysis Center(s) in the US As a large part of the US program, we must do significant physics analysis in the US.
One or more centers will help us do this. Centers even help people at institutes.
A center which fails to reach critical mass is detrimental.
Wasted resources, unfairly distributed. We must plan carefully. We must require sufficient local resources to seed
critical mass. Alternative is linked US community not located at a center.