Compare Observable, Ic with the data of g1c using the Qvalue method

Step 1 : Equation

• W : center of mass energy [GeV]
• δ(W) : the degree of the photon beam polarization in the center of mass energy
• The electron beam polarization : 0.85

• θ and φ : the π+ azimuthal and polar angle in the rest frame of the π+ π- system
• -> (<-) : the direction of the beam polarization is parallerl (anti-parallel) to the beam direction
• => (<=) : the direction of the target polarization is parallerl (anti-parallel) to the beam direction

Step 2 : Comparion of the FROST g1a data with g1c data

Topology : γ p -> p π+ ( π- ) using Qvalue method	g1c-data

Butanol data w/o CL-cut (black) / g1c data(light blue) ( Topology 1 )	Butanol data w/ CL-cut (black) / g1c data(light blue) ( Topology 1 )