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

Höche, Stefan and Krauss, Frank and Maierhöfer, Philipp and Pozzorini, Stefano and Schönherr, Marek and Siegert, Frank (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 . pp. 74-78.


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.

Item Type:Article
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Publisher statement:© 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP3.
Date accepted:24 June 2015
Date deposited:08 April 2016
Date of first online publication:26 June 2015
Date first made open access:No date available

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