13 papers · 1 filter
Status reports from the GRACE Group
Y. Yasui, T. Ueda, E. de Doncker +5
We discuss a new approach for the numerical evaluation of loop integrals. The fully numerical calculations of an infrared one-loop vertex and a box diagram are demonstrated. To per…
Precise Numerical Evaluation of the Scalar One-Loop Integrals with the Infrared Divergence
F. Yuasa, E. de Doncker, J. Fujimoto +3
We present a new approach for obtaining very precise integration results for infrared vertex and box diagrams, where the integration is carried out directly without performing any…
Multi-leg calculations with the GRACE/1-LOOP system. --Toward Radiative Corrections to e+e- -> mu nu-bar u d-bar --
F. Boudjema, J. Fujimoto, T. Ishikawa +4
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…
Electroweak corrections to Higgs production through ZZ fusion at the linear collider
F. Boudjema, J. Fujimoto, T. Ishikawa +5
We present the full order alpha electroweak radiative corrections to e+e- -> e+e-H. The computation is performed with the help of GRACE-loop. The extraction of the full QED correct…
Loop integration results using numerical extrapolation for a non-scalar integral
E. de Doncker, Y. Shimizu, J. Fujimoto +4
Loop integration results have been obtained using numerical integration and extrapolation. An extrapolation to the limit is performed with respect to a parameter in the integrand w…
Full one-loop electroweak radiative corrections to single photon production in e+e-
F. Boudjema, J. Fujimoto, T. Ishikawa +6
Large scale calculation for the radiative corrections required for the current and future collider experiments can be done automatically using the GRACE-LOOP system. Here several r…