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

Frank Krauss; Frank Siegert; Marek Schonherr; Philipp Maierhoefer; Stefan H\"oche; Stefano Pozzorini

arxiv: 1402.6293 · v2 · pith:2HUXZHNSnew · submitted 2014-02-25 · ✦ hep-ph

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

Stefan H\"oche , Frank Krauss , Philipp Maierhoefer , Stefano Pozzorini , Marek Schonherr , Frank Siegert This is my paper

classification ✦ hep-ph

keywords orderleadingproductionjetslargemergedmulti-jetparton

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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.

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