期刊
PHYSICAL REVIEW D
卷 92, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.92.094020
关键词
-
资金
- Department of Energy Early Career Award [DE-PS02-09ER09-26]
- DFG Emmy-Noether Grant [TA 867/1-1]
- COFUND fellowship [PCOFUND-GA-2012-600377]
- Office of Science, Office of High Energy Physics of the U.S. Department of Energy [DE-AC02-05CH11231]
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- CERN theory group
We present results for Drell-Yan production from the GENEVA Monte-Carlo framework. We combine the fully differential next-to-next-to leading order (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 zero-jetlike 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 e(+)e(-) collisions, for resummation-sensitive observables, the agreement with data is noticeably improved by using a lower value of alpha(s)(M-Z) = 0.1135.
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