The Matrix Element Method at Next-to-Leading Order
Abstract
This paper presents an extension of the matrix element method to next-to-leading order in perturbation theory. To accomplish this we have developed a method to calculate next-to-leading order weights on an event-by-event basis. This allows for the definition of next-to-leading order likelihoods in exactly the same fashion as at leading order, thus extending the matrix element method to next-to-leading order. A welcome by-product of the method is the straightforward and efficient generation of unweighted next-to-leading order events. As examples of the application of our next-to-leading order matrix element method we consider the measurement of the mass of the Z boson and also the search for the Higgs boson in the four lepton channel.
Keywords
Cite
@article{arxiv.1204.4424,
title = {The Matrix Element Method at Next-to-Leading Order},
author = {John M. Campbell and Walter T. Giele and Ciaran Williams},
journal= {arXiv preprint arXiv:1204.4424},
year = {2015}
}
Comments
33 pages, 9 figures : v2 matches published version, significant additions including discussion of missing energy applications