Order $N_f\alpha^2$ Corrections in LowEnergy Electroweak Processes
Abstract
We provide a compendium of techniques that can be used to compute $O(N_f\alpha^2)$ corrections to lowenergy electroweak processes. Specifically, these are the 2loop electroweak corrections containing a light fermion loop. It is shown that the vast majority of such corrections can be reduced to expressions involving a universal master integral for which an exact analytic form in dimensional regularization is given. The only exceptions are certain photon vacuum polarization diagrams. Examples are presented for diagrams that occur in a variety of processes of practical interest.
 Publication:

arXiv eprints
 Pub Date:
 July 1997
 DOI:
 10.48550/arXiv.hepph/9707520
 arXiv:
 arXiv:hepph/9707520
 Bibcode:
 1997hep.ph....7520A
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 10 pages LaTeX. 4 figures. Uses amsmath.sty, cite.sty and epsfig.sty