Accelerating LHC phenomenology with analytic one-loop amplitudes: A C++ interface to MCFM

TL;DR

This paper introduces a C++ interface to MCFM that provides analytic one-loop amplitudes, significantly speeding up high-precision calculations for LHC phenomenology.

Contribution

A novel C++ interface to MCFM offering extensive analytic one-loop amplitude results for faster LHC process simulations.

Findings

Significant reduction in computation time for one-loop matrix elements.

Validated performance improvements across various Standard Model processes.

Facilitates high-statistics event simulation for LHC analyses.

Abstract

The evaluation of one-loop matrix elements is one of the main bottlenecks in precision calculations for the high-luminosity phase of the Large Hadron Collider. To alleviate this problem, a new C++ interface to the MCFM parton-level Monte Carlo is introduced, giving access to an extensive library of analytic results for one-loop amplitudes. Timing comparisons are presented for a large set of Standard Model processes. These are relevant for high-statistics event simulation in the context of experimental analyses and precision fixed-order computations.