14.5 QC3 fit small L

We minimise the \(\chi^2\) \[ \chi^2= \sum_i \frac{( \Delta E_2^{predicted} -\Delta E_2^{latt})^2}{\sigma^2} \]

\[ K_{df}=\frac{P[0] M_0^2 }{E^2+M_r^2} \]

\[\begin{gather} \chi^2/d.o.f.=157.824 \\ P[0]=19.7711\pm (3.9) \\ P[1]=9.66828\pm (0.8) \\ \end{gather}\] {\[\begin{gather} C=\begin{pmatrix} 15& 0.0393\\ 0.0393& 0.639\\ \end{pmatrix} \end{gather}\]}