Drell-Yan production at NNLL′+NNLO matched to parton showers
By Simone Alioli, Christian W. Bauer, Calvin Berggren, F. Tackmann, Jonathan R. Walsh. 2015
138 citations recorded by the source corpus.
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 0jettiness 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 0 , 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 þ e − collisions, for resummation-sensitive observables, the agreement with data is noticeably improved by using a lower value of αsðMZ Þ¼ 0.1135.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/4c40aec517c0b5e331cee49ec054a8af63bd28d2
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In Nuclear and High Energy Physics
- Atlas Collaboration
- Cms Collaboration
- Gudrun Heinrich
- M. Schönherr
- Juan Rojo
- Ansgar Denner
- F. Krauss
- S. Höche
Citations in the corpus
- A critical appraisal and evaluation of modern PDFs (2016, methodology): “MadGraph5_aMC@NLO [286],POWHEG-BOX (v2) [287, 288] andSHERPA (v2) [289,290], or other recently developed generators, like Geneva [291], different PDF sets can”
- Les Houches 2015: Physics at TeV Colliders Standard Model Working Group Report (2016, methodology): “0-jettiness resummations within SCET have been considered recently in Drell-Yan production [88] using the Geneva Monte Carlo framework which also matches the results to a parton shower [128].”
- Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, methodology): “Parton shower matched N(2)LOQCD computations using both the MiNLO method [296], SCET resummation [196] and via the UN2LOPS technique [219].”