A Simple Way to Estimate the Value of $\bar{\alpha }\equiv \alpha (m_Z^2)$

R. B. Nevzorov, A. V. Novikov, M. I. Vysotsky

To obtain the value of electromagnetic coupling constant at $q^2=m_Z^2$, $\bar{\alpha }$, which plays a key role in electroweak physics one has to integrate the cross-section of $e^{+}{e}^{-}$-a…