Missing third-order leading-log corrections in the small-angle Bhabha calculation
نویسندگان
چکیده
منابع مشابه
Light-Pair Corrections to Small-Angle Bhabha Scattering in a Realistic Set-up at LEP
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 e...
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The luminosity measurement at the projected International Linear e + e − Collider ILC is planned to be performed with forward Bhabha scattering with an accuracy of the order of 10 −4. A theoretical prediction of the differential cross-section has to include one-loop weak corrections, with leading higher order terms, and the complete two-loop QED corrections. Here, we present the weak part and t...
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This work deals with the computation of electron pair correction to small angle Bhabha scattering, in order to contribute to the improvement of luminometry precision at lep/slc below 0.1% theoretical accuracy. The exact qed four-fermion matrix element for e+e− → e+e−e+e−, including all diagrams and mass terms, is computed and different Feynman graph topologies are studied to quantify the error ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1996
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(96)01242-7