Momentum Transfer Squared
Q
2
(GeV/
c
)
2
Center-of-Momentum Energy
W
MeV
Recoil Proton CoM Angle
θ
pq
*
degrees
Initial Electron Energy
E
0
MeV
HRSe Left
HRSp Right
Electron Mass
m
e
MeV/
c
2
Proton Mass
m
p
MeV/
c
2
Pion Mass
m
π
MeV/
c
2
Initial Electron Momentum
P
0
MeV/
c
Scattered Electron Energy
E
e
MeV
Scattered Electron Momentum
P
e
MeV/
c
Scattered Electron Angle
θ
e
degrees
Virtual Photon Energy
ω
MeV
Virtual Photon Momentum
q
MeV/
c
Virtual Photon Angle
θ
q
degrees
Recoil Proton Energy
E
p
MeV
Recoil Proton Momentum
P
p
MeV/
c
Recoil Proton Angle (relative to
q
)
θ
pq
degrees
Recoil Proton Angle (lab)
θ
p
degrees
Recoil Pion Energy
E
π
MeV
Recoil Pion Momentum
P
π
MeV/
c
Recoil Pion Angle (relative to
q
)
θ
πq
degrees
Recoil Pion Angle (lab)
θ
π
degrees
Relativistic Correction Factor
γ
Center-of-Momentum Frame Speed (lab)
β
Virtual Photon COM Energy
ω
*
MeV
Virtual Photon COM Momentum
q
*
MeV/
c
Initial Proton CoM Energy
E
0
*
MeV
Initial Proton CoM Momentum
P
0
*
MeV/
c
Recoil Proton CoM Energy
E
p
*
MeV
Recoil Proton CoM Momentum
P
p
*
MeV/
c
Recoil Pion CoM Energy
E
π
*
MeV
Recoil Pion CoM Momentum
P
π
*
MeV/
c
Recoil Pion CoM Angle
θ
πq
*
degrees