14.6 QC3 fit 3par

We minimise the \(\chi^2\) \[ \chi^2= \sum_i \frac{( \Delta E_2^{predicted} -\Delta E_2^{latt})^2}{\sigma^2} \] \[ K_{df}=\frac{P[0] M_0^2 }{E^2+M_r^2}+ P[2] \]

\[\begin{gather} \chi^2/d.o.f.=4.82825 \\ P[0]=8.28404\pm (1.7) \\ P[1]=9.65554\pm (0.0032) \\ P[2]=-1504.58\pm (53) \\ \end{gather}\] {\[\begin{gather} C=\begin{pmatrix} 2.94& 0.232& 0.0658\\ 0.232& 1e-05& -0.569\\ 0.0658& -0.569& 2.78e+03\\ \end{pmatrix} \end{gather}\]}