All-orders infrared freezing of Re+e− in perturbative QCD
(2002)
Journal Article
Howe, D., & Maxwell, C. (2002). All-orders infrared freezing of Re+e− in perturbative QCD. Physics Letters B, 541(1-2), 129-134. https://doi.org/10.1016/s0370-2693%2802%2902192-5
We consider the behaviour of the perturbative QCD corrections to the Re+e− ratio, in the limit that the c.m. energy vanishes. Writing , with Qf denoting the electric charge of quark flavour f, we find that for Nf