FROM TH2F
constant
0.019474400644634116+-0.018323905921981815
chi2/ndof = 0.0026683971705614975
plane
0.028751372747498474+-0.14860971104870052
invpt slope = 0.0026357674696342853+-0.01321084501692908
theta slope = -0.01209732821320667+-0.1254878894935623
chi2/ndof = 0.0018971663038631105
from tgraph2D
constant
0.020786213682203812+-0.000890175007717945
chi2/ndof = 4.992192729482455e-05
plane
0.022619008893399763+-0.005872793939446172
invpt slope = 0.003023257538398065+-0.000548719865656144
theta slope = -0.006578052346616972+-0.00507892444222258
chi2/ndof = 3.412481981002067e-05