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Title: Next-to-leading order QCD predictions for top-quark pair production with up to three jets

Here, we present theoretical predictions for the production of top-quark pairs with up to three jets at the next-to leading order in perturbative QCD. The relevant calculations are performed with Sherpa and OpenLoops. In order to address the issue of scale choices and related uncertainties in the presence of multiple scales, we compare results obtained with the standard scale HT/2HT/2 at fixed order and the MiNLO procedure. By analyzing various cross sections and distributions for t$$\bar{t}$$+0,1,2,3 jets at the 13 TeV LHC we found a remarkable overall agreement between fixed-order and MiNLO results. The differences are typically below the respective factor-two scale variations, suggesting that for all considered jet multiplicities missing higher-order effects should not exceed the ten percent level.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Albert Ludwigs Univ. of Freiburg (Germany). Inst. of Physics
  3. Univ. of Zurich (Switzerland). Inst. of Physics
  4. Dresden Univ. of Technology (Germany). Inst. of Nuclear and Particle Physics
Publication Date:
Grant/Contract Number:
AC02-76SF00515; AC02- 05CH11231; NSF PHY11-25915; PITN-GA-2012-316704; SI 2009/1-1; BSCGI0-157722; PP00P2-153027
Type:
Published Article
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 77; Journal Issue: 3; Journal ID: ISSN 1434-6044
Publisher:
Springer
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1345865
Alternate Identifier(s):
OSTI ID: 1361072