Light-Pair Corrections to Small-Angle Bhabha Scattering in a Realistic Set-up at LEP

TL;DR

This paper calculates light-pair corrections to small-angle Bhabha scattering at LEP, analyzing how experimental selection criteria affect the correction magnitude, which is comparable to current measurement errors.

Contribution

It provides a detailed computation of light-pair corrections considering realistic experimental conditions at LEP, including acollinearity and acoplanarity cuts.

Findings

Correction magnitude is comparable to experimental errors.

Rejection criteria significantly influence correction size.

Results aid in precise luminosity measurements at LEP.

Abstract

Light-pair corrections to small-angle Bhabha scattering have been computed in a realistic set-up for luminosity measurements at LEP. The effect of acollinearity and acoplanarity rejection criteria has been carefully analysed for typical calorimetric event selections. The magnitude of the correction, depending on the details of the considered set-up, is comparable with the present experimental error.