Physics at LHC

1
Physics at LHC

• Extra dimensions
• Composite quarks leptons
• .?

2
LHC Collisions
3
Layout of LHC(Geneva, Switzerland)
4
Experiments at the LHC

• pp ?s 14 TeV Ldesign 1034 cm-2
  s-1
• Heavy ions (e.g. Pb-Pb at ?s 1000 TeV)

TOTEM
ATLAS and CMS pp, general purpose
27 Km ring 1232 dipoles B8.3 T (NbTi at 1.9 K)
ALICE heavy ions, p-ions
First Collisions 2007 Physics in 2008
LHCb pp, B-physics
5
CMS Detector
CALORIMETERS


HCAL

ECAL


76k scintillating PbWO4 crystals
Plastic scintillator/brass sandwich

IRON YOKE
MUON ENDCAPS
Cathode StripChambers (CSC)
Resistive PlateChambers (RPC)
TRACKER
PixelsSilicon Microstrips 210 m2 of silicon
sensors 9.6M channels
Superconducting Coil,4 Tesla
MUON BARREL
Resistive Plate
Drift Tube
Chambers (RPC)
Chambers (DT)


6
Trigger DAQ at the LHC
7
CMS Trigger DAQ Systems

• Level-1 Trigger Requirements
• Input 109 events/sec at 40 MHz at full L 1034
• Output 100 kHz (50 kHz for initial running)
• Latency 3 ?sec for collection, decision,
  propagation
• Output direct to computer filter farm (no
  physical level-2)