Baryon Spectroscopy and The X* Program at Jlab/CLAS

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Baryon Spectroscopy andThe X Program at
Jlab/CLAS

• The Advantages of X Experiments
• Complimentary to N program
• For every N and D, there is a X
• Narrow width (G(X) 1/5 G(N/D))
• Partial Wave Analysis far simpler
• Easy Identification
• Missing Mass
• Invariant Mass (detached vertices)
• Isospin simplicity (I ½)
• SU(3) octet and decuplet- no singlet

Disadvantage No S-channel, reduced production
cross section
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X/X production at CLAS/g11
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The CLAS12 central detector with SVT
Scintillator Counters, dt50ps

• Forward part of SVT, 6 layers, strips oriented
  /-1.5 degree stereo angle, will improve the
  vertex determination and the resolution, linked
  to the forward DC
• Central part, 3 double sided layers, will provide
  tracking of charged particles in the solenoid
  field

Silicon Vertex Tracker, 150mm pitch, d50mm
5T SC Solenoid Magnet