Hall B Toroid

1
Hall B Toroid
Actual CLAS12 resolution including detectors
2
1H(e,ep)n Scattered Pion
Q2 (GeV2)
P (GeV)
Pion Lab Angle (deg)
Pion Lab Angle (deg)

• The pion cross section is peaked in the direction
  of the proton
• At larger Q2 pion angles and momenta are smaller
• within the capability of the detector (pp and Q2
  are uncorrelated)
• provide good missing mass resolution

3
1H(e,ep)n Scattered Electron

• Toroid allows for simultaneous inbending electron
  (large Q2large angle) and outbending positive
  hadrons (low momentumsmall angle)
• May be beneficial for dealing with Mollers, which
  will go in electron direction