QED interference in charge asymmetry near the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math> resonance at future electron-positron colliders
QED interference in charge asymmetry near the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math> resonance at future electron-positron colliders
The measurement of the charge asymmetry ${A}_{\mathrm{FB}}({e}^{\ensuremath{-}}{e}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\mu}}^{+})$ will play an important role at the high-luminosity circular electron-positron collider FCCee considered for construction at CERN. In particular, near the $Z$ resonance, $\sqrt{s}\ensuremath{\simeq}{M}_{Z}\ifmmode\pm\else\textpm\fi{}3.5\text{ }\text{ }\mathrm{GeV}$, ${A}_{\mathrm{FB}}$ will provide a very precise value of the pure electromagnetic coupling constant ${\ensuremath{\alpha}}_{\mathrm{QED}}({M}_{Z})$, which is vitally …