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We calculate, for the first time, the next-to-next-to leading order (NNLO) QCD corrections to spin correlations in top quark pair production at the LHC. The NNLO corrections play an important role in the description of the corresponding…

High Energy Physics - Phenomenology · Physics 2019-08-28 Arnd Behring , Michal Czakon , Alexander Mitov , Andrew S. Papanastasiou , Rene Poncelet

We present a comprehensive study of differential distributions for Tevatron top-pair events at the level of stable top quarks. All calculations are performed in NNLO QCD with the help of a fully differential partonic Monte-Carlo and are…

High Energy Physics - Phenomenology · Physics 2016-05-25 Michal Czakon , Paul Fiedler , David Heymes , Alexander Mitov

We present a fully-differential and high-precision calculation of top-quark pair-production and decay at the LHC, providing predictions for observables constructed from top-quark leptonic and $b$-flavoured jet final states. The calculation…

High Energy Physics - Phenomenology · Physics 2017-09-20 Jun Gao , Andrew S. Papanastasiou

We present results at NLO QCD for hadronic production and decay of top quark pairs, taking into account t tbar spin correlations.

High Energy Physics - Phenomenology · Physics 2009-11-07 W. Bernreuther , A. Brandenburg , Z. G. Si , P. Uwer

We present the first complete next-to-next-to-leading order (NNLO) QCD predictions for differential distributions in the top-quark pair production process at the LHC. Our results are derived from a fully differential partonic Monte Carlo…

High Energy Physics - Phenomenology · Physics 2016-03-17 Michal Czakon , David Heymes , Alexander Mitov

In this work we investigate the NLO QCD+EW corrections to the top quark pair production and their effects on the spin correlation coefficients and asymmetries at fixed-order top quark pair production and LO decay in the dilepton channel,…

High Energy Physics - Phenomenology · Physics 2021-09-29 Rikkert Frederix , Ioannis Tsinikos , Timea Vitos

We calculate all main top-quark pair differential distributions at the Tevatron. For the first time Tevatron predictions for this process include all Standard Model corrections through NLO (referred to as complete-NLO) consistently combined…

High Energy Physics - Phenomenology · Physics 2017-12-14 Michał Czakon , David Heymes , Alexander Mitov , Davide Pagani , Ioannis Tsinikos , Marco Zaro

We describe predictions for top-quark pair differential distributions at hadron colliders, which combine state-of-the-art NNLO QCD calculations and NLO electroweak corrections together with double resummation at NNLL$'$ accuracy of…

We investigate a number of observables that are and will be instrumental in the exploration of $\tbart$ production and decay at the Tevatron and the LHC. For this analysis we made a computer program that incorporates besides the NLO QCD…

High Energy Physics - Phenomenology · Physics 2014-11-20 Werner Bernreuther , Zong-Guo Si

We present results for the next-to-leading order QCD corrections to the production and semi-leptonic decays of a top quark pair in hadron collisions, retaining all spin correlations. To evaluate the virtual corrections, we employ…

High Energy Physics - Phenomenology · Physics 2009-11-18 Kirill Melnikov , Markus Schulze

In ongoing and upcoming hadron collider experiments, top quark physics will play an important role in testing the Standard Model and its possible extensions. In this work we present analytic results for the differential cross sections of…

High Energy Physics - Phenomenology · Physics 2011-05-05 W. Bernreuther , A. Brandenburg , Z. G. Si , P. Uwer

We report on a new fully differential calculation of the next-to-next-to-leading-order (NNLO) QCD radiative corrections to the production of top-quark pairs at hadron colliders. The calculation is performed by using the $q_T$ subtraction…

High Energy Physics - Phenomenology · Physics 2019-09-04 Stefano Catani , Simone Devoto , Massimiliano Grazzini , Stefan Kallweit , Javier Mazzitelli

NNLO QCD corrections to the production and decay of top-quark pairs allow performing precision phenomenology in inclusive and fiducial phase spaces. State-of-the-art predictions for top-quark pair production and their comparison to recent…

High Energy Physics - Phenomenology · Physics 2022-12-13 Rene Poncelet

The collider experiments at the Tevatron and the LHC will allow for detailed investigations of the properties of the top quark. This requires precise predictions of the hadronic production of $t\bar t$ pairs and of their subsequent decays.…

High Energy Physics - Phenomenology · Physics 2009-11-07 W. Bernreuther , A. Brandenburg , Z. G. Si , P. Uwer

Top quark-antiquark ($t\bar t$) pairs will be produced copiously at the Tevatron collider and in huge numbers at the LHC. This will make possible detailed investigations of the properties and interactions of this quark flavor. The analysis…

High Energy Physics - Phenomenology · Physics 2009-11-07 W. Bernreuther , A. Brandenburg , Z. G. Si , P. Uwer

We consider QCD radiative corrections to $W^+W^-b {\bar b}$ production with leptonic decays and massive bottom quarks at the LHC. We perform an exact next-to-leading order (NLO) calculation within the $q_T$-subtraction formalism and…

High Energy Physics - Phenomenology · Physics 2025-07-17 Luca Buonocore , Massimiliano Grazzini , Stefan Kallweit , Jonas M. Lindert , Chiara Savoini

We present theoretical results at approximate NNLO in QCD for top-quark pair-production total cross sections and top-quark differential distributions at the LHC in the SMEFT. In this work we consider effects of new physics parametrized by…

High Energy Physics - Phenomenology · Physics 2024-10-01 Alberto Tonero , Nikolaos Kidonakis

In these proceedings we present the calculation of NLO QCD corrections to $pp\to t\bar{t}jj$ in the dilepton decay channel. The narrow width approximation is used to model the decays of the top quark pair preserving spin correlations. Jet…

High Energy Physics - Phenomenology · Physics 2023-09-27 Daniel Stremmer

We report on the computation of NLO QCD corrections to top-quark pair production in association with two photons at the LHC. Higher-order effects and photon bremsstrahlung are taken into account in the production and decays of the top-quark…

High Energy Physics - Phenomenology · Physics 2023-09-01 Daniel Stremmer , Malgorzata Worek

Triggered by the observation of four top-quark production at the LHC by the ATLAS and CMS collaboration we report on the calculation of the next-to-leading order QCD corrections to the Standard Model process $pp \to t\bar{t}t\bar{t}$ in the…

High Energy Physics - Phenomenology · Physics 2024-06-24 Nikolaos Dimitrakopoulos , Malgorzata Worek
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