Formula_1335

\[\bar{\alpha}_{s}^{(2)}\left(Q^{2}\right)=\frac{1}{\beta_{1} \ln \left(Q^{2} / \Lambda^{2}\right)}-\frac{\beta_{2}}{\beta_{1}} \frac{\ln \ln \left(Q^{2} / \Lambda^{2}\right)}{\ln \left(Q^{2} / \Lambda^{2}\right)},\]