H' Newman, E' Hughes, A' Weinstein

1
The Caltech CMS Group

• CMS Higgs, SUSY, Extra Dimensions,
  Other BSM Physics
• Precision Photon and Electron Measurements
• CMS ECAL and Tracker
• CMS Core Software
• Grid Analysis Systems
• Networks Collaborative Systems for LHC,
  HENP

• H. Newman, E. Hughes, A. Weinstein

2
CALTECH CMS GROUP

• D. Adamczyk, J. Albert, A. Bornheim, J. Bunn, G.
  Denis, P. Galvez, M. Gataullin, E. Hughes, I.
  Legrand, V. Litvin, Y. Ma, D. Nae, I. Narsky,
  H. Newman, S. Ravot, S. Singh, C. Steenberg, X.
  Su, M. Thomas, V. Timciuc, F. Van Lingen, R.
  Voicu, J. Veverka, A. Weinstein, R.
  Wilkinson, Y. Xia, Y. Yong, L. Zhang, K. Zhu,
  R. Y. ZhuCMS At LHC 1994 - 2020
• Search for Higgs, SUSY, New Physics
  from Electroweak to Quantum Gravity
• Emphasis on Precision e/g Measurements
  Higgs Searches, Extra Dimensions,
  CP Violation in the Higgs Sector

3
CMS at LHC 2007 Start

• pp ?s 14 TeV L1034 cm-2 s-1
• Heavy ions

CMS
TOTEM
pp, general purpose HI
ATLAS
First Beams Summer 2007 Then Physics
ALICE HI
LHCb B-physics
Higgs, SUSY, Extra Dimensions, CP Violation, QG
Plasma, the Unexpected
4
4 TESLA
80 Tons
Brass sandwich
230 m2 of Silicon Microstrips8 X 107 Silicon
Pixels
Modular Design
5
U.S. CMS is Growing Stronger570 Members, 49
Institutions
Caltech has Led the US CMS Collaboration
Board Since 1998 4th Term as Chair Through 2006
Princeton
TexasTech
FIU, FIT
US CMS GROWTH2003 FIUYale2004 Brown La.
Tech 2005 Cornell Vanderbilt UVa.
Colorado LLNL Puerto Rico
Zhu (ECAL IB), Wilkinson (ASCB)
6
We Need to be Ready to Discover and Study New
Physics on Day 1

CMS
Elwk Data New MTOP ? MHiggs lt 186 GeV
The Higgs, or Other New Physics Might Be
Discovered Early
7
Higgs Search Combined Results VBF and Inclusive
Production of H? gg

• Integrated luminosity for 5s discovery
• VBF production mode Both inclusive and
  VBF

Higgs Signal and Bkgdswith improved isolation

• In VBF Channel Cuts can be tuned for S/B gtgt1, to
  study H production dynamics in the early phase
  of LHC operation
• Next Steps Underway for Physics TDR Use NLO
  Monte Carlo Generator for Higgs Production
  Backgrounds Study Improved Selection (Photon
  Isolation), Optimize ECAL Calibration

Litvin, Dubinin, Newman, Zhu Ma, Veverka, Yong,
Timciuc
8
Search for Randall Sundrum Gravitons with Two
Photon Decays

• Gravity scale MPlanck exp(-krc) TeVfor krc
  11-12 no hierarchy
• Graviton resonances mn xn k exp(-krc),
  J1(xn)0
• Two parameters control the properties of the RS
  model mass of the graviton mG and the constant
  ck/MPlanck determining the graviton couplings
  and widths

9
Extra Dimensions Detecting a Randall Sundrum
Graviton in G???
Fully Simulated with Backgrounds Saturation
Correction
Bkgds QCD Jets, Direct Photons, Drell-Yan
Can Directly Measure the Graviton Width
5.2 s Signif.
Preliminary Results 10 fb-1 MG gt 3.14 TeV for
c0.1 MG gt 1.32 TeV for c0.0130 fb-1 MG gt
3.54 TeV for c0.1 MG gt 1.59 TeV for c0.01
10
The LHC Is Progressing Magnet Installation
at Full Speed
Cryodipoles (of 1232)
Assembled 80Cold Tested 75 Ready
50Installed 25
1000
First Dipole March 7, 2005
750
Equivalent Dipoles
500
?
250
Update February 28, 2006
11
ECAL Monitor Laser System Project on Schedule
Cost Meets Specs.

• L.Y. Zhang, K.J. Zhu. R.Y.Zhu A. Bornheim
• Full 3-Laser System now routinely used at CERN
  test beam.
• Operation
• 1200 Hours 8/03 10/03
• 2500 Hours 5/04 11/04
• Laser Monitoring Stability (With Internal PIN
  Calib.) SM10, Fall 2004 0.05
• Cosmic Calibration at CERN since July 2005
• Continuous operation for many months.

12
SM10 Beam Test Result
Bornheim, Pappas and R.Y. Zhu participated in
2004 SM 10 beam test 2005 cosmic test
Energy Resolution ?(E)/E lt 1 if E gt 25
GeV ?(E)/E 0.5 at 120 GeV Independent of Posn
on Crystal Face
Monitoring Stability 0.04 (45 hours)
13
LHC Data Grid HierarchyDeveloped at Caltech
(1999)
PByte/sec
100-1500 MBytes/sec
CERN Center PBs of Disk Tape Robot
10-40 Gbps
FNAL Center
IN2P3 Center
INFN Center
RAL Center
10 Gbps
2-10 Gbps
Institute
Institute
Institute
Institute
Physics data cache
0.1 to 10 Gbps
Tier 4
Workstations
14
CMS SC Magnet (4 Tesla 2.5 GJoule) Cooldown at
100oK, On its Way to 4o K
15
Cosmic Rays Through a Barrel Sector of Muon
Chambers (Jan. 2006)
16
3000 Ton Gantry Crane Spanning the Surface Hall,
Being Assembled in France
?
Start Lowering the Major Pieces of CMS (Up to
2500 Tons) 100m Underground This Spring
17
Extra Slides Follow
18
L3 PHYSICS RESULTSand the CALTECH GROUP

• Of the 300 L3 PhysicsPapers Published to Date
• 46 (15) have been written by Caltech group
  members, and rely on their analysis
• 41 more have been produced under Caltech group
  leadership
• Led 3 of 8 LEP1 Analysis Groups
• New Particles, Taus, QCD
• Led 2 of 3 LEP2 Analysis Groups
• SUSY, Exotics
• Also Primary Contributions to
• BGO and Muon Design Development
• Precision ECAL Calibration (RFQ) Physics with
  Electrons and Photons
• Distributed Offline Computing
• Intl Networking (also for HENP)

L3/LEP community is still active Global EW Fit
with new top mass
July 2005 Mtop 172.7 ? 2.9 Gev MH lt 186 GeV
(95 CL)
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Physics TDRVol2.2 Full Analyses (13 of Them)

• ECAL/egamma
• H?gg Photon ID Ultimate ECAL Resolution
• H?ZZ() Electron reco golden, silver, bronze
• Muons
• H?ZZ()?4m Muon id golden, silver, bronze
• H?WW()?mm High-stats dimuons jet veto
• Z?mm High-PT muons
• HCAL/JetMET
• SUSY (0.5 TeV) Jets, missing Et at the Tevatron
  limit
• qqH Forward jets triggering
• Z?jet-jet High-pt jets dijet mass
• Tracker/btau
• ttH B tagging top reconstruction
• A/H?tau-tau Tau tagging trigger backgrounds/eff
• BS ?J/yf Vertexing low-pt tracking
• Heavy Ions
• Quarkonia
• Jet quenching effects

Vol. I Due End 2005Vol. II Spring 2006
20
New ECAL Calibration Technique Using h ? gg
Clean h Peak Reconstructed In Barrel

• mh 547.30 0.12 MeV, BR (h ? gg) 39
  Reconstruct h invariant mass use the peak for
  calibration
• scalib ? 2 x (sh/mh)/ ? NgTypical photon ET
  used for calib. 5 GeV
• h ? gg Process has several advantages
• Only ECAL information is needed
• Photon reconstruction less sensitive than
  electron reco. to material in tracker.
• Rate of h ? gg is much higher than W? en.Also
  can used at very low luminosity

Now Study ImprovedL1 Trigger Selectionfor
Events
RESULTS ECAL calibration with an accuracy of
0.5 can be done in ? one day of dedicated
running for L 2 x 1033 cm-2s-1. At start-up of
LHC, with L 1032 cm-2s-1,0.5 accuracy could
be reached in ? 2 days
Shevchenko, Lee, Litvin, HNBornheim, Kumar
21
CMS V34.2 ScheduleRamp-Up to Physics

• Objective Complete Initial CMS for June
  2007Full Detector for 1st Physics Run by March
  2008
• Close Yokes, Cool Test Magnet on Surface
  10/1/05 1/15/06
• Ready for Crates in USC 11/30/05
• Cosmic Challenge Field Mapping 1/15/06
  3/15/06
• Install EB and Part of EB- on Surface 3/15/06
  4/30/06
• Ready for PCs in SXC for Crates in UXC 4/30/06
• Lower Major Elements, Install HB in Magnet
  Spring Fall 2006
• EB EB- Commissioning 10/06-12/06 2/07-5/07
• Tracker Commissioning Underground
  2/1/07 5/15/07
• Beampipe Installation and Commissioning 3/1/07
  6/15/07
• Test Magnet Cooling in Place
  4/15/07 6/15/07
• CMS Working Detector Ready for Beam
  6/30/07
• After Shutdown Install Pixels , Nov.
  2007-Feb. 2008 ECAL Endcap and PreShower
  (EE/SE)
• Ready for Installation by July 2007

22
PWO Crystal Radiation Damage Study

Emission Weighted Radiation Induced AC
J.M. Chen, R.H. Mao, L.Y. Zhang and R.-Y. Zhu
studied mass produced PWO crystals from Russia
and China for CMS Results Show(1) Most mass
produced crystals can be used in the
barrel (2) Rigorous QC is required for crystals
to be used in the endcaps
Spec lt1.5 m-1
23
Neural Net Separating Higgs ? gg Signal from
QCD Backgrounds
Both photons in barrel R9 gt 0.95
6 events in signal region
24
Higgs CP properties

• Its 2009, and we appear to have discovered a
  
  light Higgs. But all we have is a mass
  peak.
• Is this a Standard Model Higgs or something else
  ?
  
• Standard model Higgs is spin-0 and CP-even.
• Extensions can beg to differ
• 2HDM
• MSSM contains h, H (CP-even), and A (CP-odd).
• Given a general set of complex parameters of the
  two-doublet Higgs potential, neutral Higgs sector
  will mix, and mass eigenstates (h1,h2,h3) will
  have no definite CP parity.
• (Carena, Ellis, Mrenna, Pilaftsis, Wagner.
  Nucl.Phys. B659 (2003) 145-178, hep-ph/021146)
• The CP violating quantum effects defined by
  Im(mAt,b)/M2SUSY are large at moderate MSUSY and
  large mAt,b
• Possible channels to detect CP violation ttH,
  vector boson fusion WW, ZZ -gt H -gt t t- , gg -gt
  H -gt g g

25
CALTECH CONTRIBUTIONS and LEADERSHIP In CMS and
LHC (1/2)

• US CMS Collaboration Board Chair 1998 ? 2006
  (4th Term)
• Close Collab. with US CMS Research Program
  ManagementDPM R. Cousins
• CMS Data Analysis and Software
• R. Wilkinson Member of the US CMS Advisory SC
  Board
• Realistic H??? Signal/Background Optimization
• ECAL Design Photon Identification and
  Reconstruction
• g/p0 Separation Recovery of converted photons in
  Tracker
• Forward Muon (EMU) Trigger
• Core Software and Reconstruction Software EMU
  and HCALCommon Detector Framework
• Cross-DAQ Software for CMS Slice Tests, and
  Magnet Test
• Software HCAL and Common Detector Framework
• CMS Electromagnetic Calorimeter (ECAL)
• R. Zhu US CMS Institute Board Chair Member of
  Advisory Board
• Laser Monitoring System Construction Operation
• Precision Calibration Studies Test Beam (A.
  Bornheim) Simulations
• Precision Calibration of ECAL with ???? Events
• Crystal Development for LHC and HENP

26
CALTECH CONTRIBUTIONS and LEADERSHIP In CMS and
LHC (2/2)

• Originated, Launched US CMS SC Project, with
  FNAL, Northeastern
• CMS SC Board Chair 1996-2001
• Originated Data Grid Hierarchy Model for LHC
  (1999) DISUN in 2005
• Grid Project Leadership PI of PPDG, UltraLight,
  IGAE Projects Co-PI of
  GriPhyN/iVDGL, LambdaStation
• Next Generation Grid Systems for Analysis (GAE
  and MonALISA)
• First Tier2 Prototype Caltech, with UCSD
• Bilateral T2Grid RD with Brazil (UERJ, USP)
  This Year
• Commissioned Brazil Tier2 as a Grid3 and now an
  OSG Node (May 2005)
• Regional Center and Network Design and
  Development for LHC
• India, Pakistan, China, Brazil, Korea, Romania,
  ...
• Networking and Collaborative Analysis Systems for
  HENP in the LHC Era
• LHCNet Co-Management and Operations of US-CERN
  NetworkFounding members of the new US LHC
  Network Working Group
• Chair ICFA-SCIC Internet2 HENP WG
• Internet2 Application Strategy Council, HOPI
  Initiative
• VRVS System for Global Collaboration in HENP

J. Bunn Talk
27
Caltech CMS Group CONCLUSIONS

• CMS Physics Leading Intermediate Mass Higgs
  Search Strategy
• Optimize Selection, Reco., Analysis, ECAL
  Calibration
• Addition of Weinstein, Hughes Students Adding
  Substantial Strength
• CMS ECAL Monitor Construction and Testbeam Work
• TB2004-5 and Laser Monitor Quite Successful
  0.04 Stability
• Leading Grid Developments for CMS and the LHC
  Community
• Designing and Engineering the Next Generation
  Grid Systems, Networks, and Grid-Enabled
  Analysis Environment for LHC
• Continuing Strong Contributions to Core Software
  Reconstruction EMU, HCAL, Test Beam Cross DAQ,
  etc.
• Our Efforts are Highly Leveraged
• CACR Partnership and Support Several Grid
  Projects
• NCSA, TeraGrid, Vanderbilt Support Internet2
  Partnerships
• Influx of Excellent Students A Major Opportunity

28
Caltech CMS Group CONCLUSIONS

• CMS Physics Leading Intermediate Mass Higgs
  Search Strategy
• Optimize Selection, Reco., Analysis, ECAL
  Calibration
• CMS ECAL Monitor Construction and Testbeam Work
• TB2004-5 and Laser Monitor Quite Successful
  0.04 Stability
• Leading Grid Developments for CMS and the LHC
  Community
• Designing and Engineering the Next Generation
  Grid Systems, Networks, and Grid-Enabled
  Analysis Environment for LHC
• Continuing Strong Contributions to Core Software
  Reconstruction EMU, HCAL, Test Beam Cross DAQ,
  etc.
• Our Efforts are Highly Leveraged
• CACR Partnership and Support Several Grid
  Projects
• TeraGrid, NCSA Support Internet2, ESnet Other
  Partnerships
• Students A Major Opportunity