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Title: Next-to-leading order QCD predictions for top-quark pair production with up to two jets merged with a parton shower

We present differential cross sections for the production of top-quark pairs in conjunction with up to two jets, computed at next-to-leading order in perturbative QCD and consistently merged with a parton shower in the SHERPA+OPENLOOPS framework. Top quark decays including spin correlation effects are taken into account at leading order accuracy. The calculation yields a unified description of top-pair plus multi-jet production, and detailed results are presented for various key observables at the Large Hadron Collider. As a result, a large improvement with respect to the multi-jet merging approach at leading order is found for the total transverse energy spectrum, which plays a prominent role in searches for physics beyond the Standard Model.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [2] ;  [4]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States). Photon Science
  2. Durham Univ., Durham (United Kingdom)
  3. Univ. Zurich, Zurich (Switzerland)
  4. Institut fur Kern-und Teilchenphysik, Dresden (Germany)
Publication Date:
Report Number(s):
SLAC-PUB-15911
Journal ID: ISSN 0370-2693; PII: S0370269315004827; TRN: US1601069
Grant/Contract Number:
AC02-76SF00515; PP00P2_153027
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 748; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Swiss National Science Foundation (SNSF); European Commission (EC)
Contributing Orgs:
Open Science Grid; National Science Foundation, Arlington, VA (United States)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; phenomenology-HEP; HEPPH
OSTI Identifier:
1209156
Alternate Identifier(s):
OSTI ID: 1134556; OSTI ID: 1204543