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

Höche, Stefan; Krauss, Frank; Maierhöfer, Philipp; Pozzorini, Stefano; Schönherr, Marek; Siegert, Frank

Abstract

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. 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.

Citation

Höche, S., Krauss, F., Maierhöfer, P., Pozzorini, S., Schönherr, M., & Siegert, F. (2015). Next-to-leading order QCD predictions for top-quark pair production with up to two jets merged with a parton shower. Physics Letters B, 748, 74-78. https://doi.org/10.1016/j.physletb.2015.06.060

• Journal Article Type: Article
• Acceptance Date: Jun 24, 2015
• Online Publication Date: Jun 26, 2015
• Publication Date: Sep 2, 2015
• Deposit Date: Mar 2, 2016
• Publicly Available Date: Apr 8, 2016
• Journal: Physics Letters B
• Print ISSN: 0370-2693
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 748
• Pages: 74-78
• DOI: https://doi.org/10.1016/j.physletb.2015.06.060