FC for Tbb

form_factor_values = [-0.824158, -0.73559, -0.698631, -0.657883, -0.544841]

form_factor_covariance_matrix=
            [[0.0011221, 0.00067493, 0.000372209, 0.000344962, 0.00013434],
    [0.00067493, 0.000620493, 0.000382572, 0.000331013, 0.000151542],
    [0.000372209, 0.000382572, 0.000326316, 0.000237544, 0.00012988],
    [0.000344962, 0.000331013, 0.000237544, 0.000335537, 0.00015963],
    [0.00013434, 0.000151542, 0.00012988, 0.00015963, 0.000275634]]

q2s=[-0.0246563, -0.0492915, -0.073866, -0.0984238, -0.220751]