Improving the Weizsäcker-Williams Approximation in Electron-Proton Collisions

Details Improving the Weizsäcker-Williams Approximation in Electron-Proton Collisions Improving the Weizsäcker-Williams Approximation in Electron-Proton Collisions

1993-10-26

arxiv.org/abs/hep-ph/9310350v1

Phys.Lett.B319:339-345,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages (LaTex, style file included) + 3 tables

Scientific paper

10.1016/0370-2693(93)90823-Z

We critically examine the validity of the Weizs\"acker-Williams approximation in electron-hadron collisions. We show that in its commonly used form it can lead to large errors, and we show how to improve it in order to get accurate results. In particular, we present an improved form that is valid beyond the leading logarithmic approximation in the case when a small-angle cut is applied to the scattered electron. Furthermore we include comparisons of the approximate expressions with the exact electroproduction calculation in the case of heavy-quark production.

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