HERWIRI2.1: Electroweak Corrections for Hadron Scattering

Abstract

We describe the program HERWIRI2.1, which implements order alpha-squared photonic radiative corrections exponentiated at the amplitude level (initial state, final state, and initial-final interference) and electroweak corrections to the matrix element by generating events using the KK Monte Carlo to generate the hard process, with quark initial states generated according to PDFs via an LHAPDF interface. The events can be showered internally using HERWIG6.5 or exported and showered using any desired external showering program. Some early results are shown, including comparisons to HERWIG6.5 and HORACE 3.1.