Drell-Yan Production at NNLL'+NNLO Matched to Parton Showers
Abstract
We present results for Drell-Yan production from the GENEVA Monte-Carlo framework. We combine the fully-differential NNLO calculation with higher-order resummation in the 0-jettiness resolution variable. The resulting parton-level events are further combined with parton showering and hadronization provided by PYTHIA8. The 0-jettiness resummation is carried out to NNLL', which consistently incorporates all singular virtual and real NNLO corrections. It thus provides a natural perturbative connection between the NNLO calculation and the parton shower regime, including a systematic assessment of perturbative uncertainties. In this way, inclusive observables are correct to NNLO, up to small power corrections in the resolution cutoff. Furthermore, the perturbative accuracy of 0-jet-like resummation variables is significantly improved beyond the parton shower approximation. We provide comparisons with LHC measurements of Drell-Yan production at 7 TeV from ATLAS, CMS, and LHCb. As already observed in collisions, for resummation-sensitive observables, the agreement with data is noticeably improved by using a lower value of .
Cite
@article{arxiv.1508.01475,
title = {Drell-Yan Production at NNLL'+NNLO Matched to Parton Showers},
author = {Simone Alioli and Christian W. Bauer and Calvin Berggren and Frank J. Tackmann and Jonathan R. Walsh},
journal= {arXiv preprint arXiv:1508.01475},
year = {2015}
}
Comments
26 pages, 20 figures