SIMPLE APPROXIMATION FOR QED O(α) CORRECTED FORWARD BACKWARD ASYMMETRY
- 21 November 1989
- journal article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters A
- Vol. 4 (25) , 2487-2491
- https://doi.org/10.1142/s0217732389002781
Abstract
It is shown that the simple semi-analytical formula which involves a convolution of the Born asymmetry with the photon spectrum agrees to a precision better than LEP’s experimental error with exact O(α) result for the forward-backward asymmetry. The exact O(α) result differs from the convolution by 0.5×10−3 at the Z peak and by less than 3 ×10−3 close to Z peak. The result was obtained without kinematical cut-offs.Keywords
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