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

Stefan Höche (SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA) ; Frank Krauss (Institute for Particle Physics Phenomenology, Durham University, Durham, DH1 3LE, UK) ; Philipp Maierhöfer (Physik-Institut, Universität Zürich, Zürich, CH-8057, Switzerland) ; Stefano Pozzorini (Physik-Institut, Universität Zürich, Zürich, CH-8057, Switzerland) ; Marek Schönherr (Institute for Particle Physics Phenomenology, Durham University, Durham, DH1 3LE, UK) ; et al. - Show all 6 authors

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 S herpa +O pen L oops 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. 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.

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      "value": "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 S herpa +O pen L oops 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. 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."
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Published on:
28 June 2015
Publisher:
Elsevier
Published in:
Physics Letters B (2015)

DOI:
https://doi.org/10.1016/j.physletb.2015.06.060
Copyrights:
The Authors
Licence:
CC-BY-3.0

Fulltext files: