MISC

Appr. total numbner of pi0

Fig1. Total number of pi0.
Calculated from the gaus(0) + background fit as :
N = sqrt(2*pi) * sigma * height / BinWidth .For three targets D+S: N_pi0 = 2.13 M



Phi angle(pi0, gamma*) and alpha(e,gamma) in DATA and SIMUL

Fig2a.Quantitative effect of the angular cut on Pi0mass dist (here, cut >10)


Fig2b.DATA. Angle between electron and photon from pi0 pair on D(Fe).

Fig3.SIMUL. Angle between electron and photon from pi0 pair on D.

Fig4 DATA. Phi angle around virtual photon
Left & Right are Data for full z range and for z>0.4 corres.

Fig4a SIMULATION Phi angle around virtual photon
Left & Right are Gener & Recon events. Top: all z, bottom z>0.4;








MX2

Fig5 Mx2 for: left -all 2gamma, right - pi0 inside sigma mass:

Fig6 Mx2 for z>0.2 and z>0.4

Fig7 pT2 and Z with Mx2>2 cut :