Multi-leg calculations with the GRACE/1-LOOP system. --Toward Radiative Corrections to e+e- -> mu nu-bar u d-bar --

Details Multi-leg calculations with the GRACE/1-LOOP system. --Toward Radiative Corrections to e+e- -> mu nu-bar u d-bar -- Multi-leg calculations with the GRACE/1-LOOP system. --Toward Radiative Corrections to e+e- -> mu nu-bar u d-bar --

2004-07-07

arxiv.org/abs/hep-ph/0407079v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages,invited talk at "Loops & Legs in Quantum Field Theory 2004", Zinnowitz, Germany, April 2004

Scientific paper

10.1016/j.nuclphysbps.2004.09.01

We performed the calculation of the full O(alpha) corrections to e+e- -> mu- nu-bar u d-bar with the help of the GRACE/1-LOOP system. We discuss how a finite decay width introduces a serious gauge invariance breaking, particularly for infrared 5-point functions. This is related to the way the reduction of those functions is performed and to the treatment of the width in the reduction.

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