MoCaNLO: a Monte Carlo integrator for NLO calculations

TL;DR

MoCaNLO is a Monte Carlo integration tool designed for precise NLO calculations of collider processes, combining advanced matrix element computation with infrared divergence handling, enabling accurate predictions for high-energy physics experiments.

Contribution

The paper introduces MoCaNLO, a new Monte Carlo integrator that efficiently computes NLO cross sections and distributions, integrating Recola and Catani-Seymour subtraction methods.

Findings

Used for NLO QCD corrections to off-shell top-antitop production.

Applied to NLO electroweak corrections in vector-boson scattering.

Demonstrated accuracy and versatility in complex collider calculations.

Abstract

We present the Monte Carlo integration code MoCaNLO, which computes cross sections and distributions for processes at high-energy colliders like the LHC at leading and next-to-leading order (NLO) in the strong and electroweak couplings. It relies on the Recola package for the calculation of matrix elements and uses Catani-Seymour dipole subtraction for the treatment of infrared singularities. It has been used for several cutting-edge calculations of NLO QCD and electroweak corrections over the last years, such as NLO QCD corrections to off-shell top-antitop-quark production in association with a pair of bottom quarks and NLO electroweak corrections to vector-boson scattering processes.