O(N_f alpha^2) Electromagnetic Charge Renormalization in the Standard Model
Abstract
The O(N_f alpha^2) electroweak radiative corrections to the Thomson scattering matrix element are calculated for a general renormalization scheme with massless fermions. All integrals can be evaluated exactly in dimensional regularization which in several cases yields new results that are remarkably simple in form. A number of stringent internal consistency checks are performed. The Z-gamma mixing complicates the calculation of 1-particle reducible diagrams considerably at this order and a general treatment of this problem is given. Conditions satisfied by O(N_f alpha^2) counterterms are derived and may be applied to other calculations at this order.
- Publication:
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arXiv e-prints
- Pub Date:
- May 1998
- DOI:
- 10.48550/arXiv.hep-ph/9805364
- arXiv:
- arXiv:hep-ph/9805364
- Bibcode:
- 1998hep.ph....5364M
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 29 pages LaTeX. 6 figures. Uses amsmath.sty, cite.sty and epsfig.sty