Accurate simulation of W, Z and Higgs boson decays in Sherpa
Frank Krauss, Jonas M. Lindert, Robin Linten, Marek Sch\"onherr
TL;DR
This paper enhances the SHERPA event generator by incorporating advanced electromagnetic and electroweak corrections to improve the precision of simulating W, Z, and Higgs boson decays at the LHC.
Contribution
It introduces a modified resummation scheme and fixed-order calculations to include weak gauge boson virtual corrections in boson decay simulations.
Findings
Improved accuracy in Drell-Yan process simulations.
Enhanced Higgs decay modeling precision.
Numerical results demonstrate better agreement with experimental data.
Abstract
We discuss the inclusion of next-to-next-to leading order electromagnetic and of next-to leading order electroweak corrections to the leptonic decays of weak gauge and Higgs bosons in the SHERPA event generator. To this end, we modify the Yennie-Frautschi-Suura scheme for the resummation of soft photon corrections and its systematic improvement with fixed-order calculations, to also include the effect of virtual corrections due to the ex- change of weak gauge bosons. We detail relevant technical aspects of our implementation and present numerical results for observables relevant for high-precision Drell-Yan and Higgs boson production and decay simula- tions at the LHC.
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