Collaborative Research Center TRR 257

B1b: Precision top-quark physics at the LHC

Principal Investigator
Prof. Michal Czakon RWTH Aachen University
Prof. Gudrun Heinrich Karlsruhe Institute of Technology
Prof. Malgorzata Worek RWTH Aachen University

Subject

The goal of the project is to provide state-of-the-art theoretical predictions for a broad class of processes that involve top quark pair production with an additional final state. We consider the process pp → tt + X, where X=H,W, Z, photon, jet, di-photon, bb, tt, di-jet. Depending on the final state, results for the LHC with higher order corrections at unprecedented level will be provided in the form of flexible Monte Carlo programs that can be used to generate any infrared safe observable. Specifically, the precision will be increased in two directions: either through the inclusion of full off-shell effects at NLO QCD + NLO electroweak for top-quark pair production in association with additional final state particles, or through the calculation of NNLO QCD corrections for pp → tt + X, where X is the Higgs boson or a weak boson.

Topics

(a) Full NLO QCD including off-shell effects: state of the art theoretical predictions for $ pp \to t \bar t + X$ ($X=H,\gamma, Z, W^\pm$), both in the dilepton and lepton-plus-jet decay channel; calculation of electroweak corrections to $t \bar t + X$, matching to parton shower.
(b) NNLO QCD predictions (total and differential) for $pp \to t \bar t H$, decays in the narrow width approximation; very precise $y_t$ extraction; differential NNLO predictions for $pp \to t \bar t \gamma, t \bar t Z, t \bar t W^\pm$.

P3H-23-029
Title: NLO QCD predictions for off-shell $t\bar{t}W$ production in association with a light jet at the LHC
Type: Paper
Authors: Huan-Yu Bi, Manfred Kraus, Minos Reinartz and Malgorzata Worek
arXiv: 2305.03802
Info: Published in JHEP 09 (2023) 026
P3H-23-021
Title: HighTEA: High energy Theory Event Analyser
Type: Paper
Authors: M. Czakon, Z. Kassabov, A. Mitov, R. Poncelet, A. Popescu
arXiv: 2304.05993
Info:
P3H-22-121
Title: A study of additional jet activity in top quark pair production and decay at the LHC
Type: Paper
Authors: Giuseppe Bevilacqua, Michele Lupattelli, Daniel Stremmer, Malgorzata Worek
arXiv: 2212.04722
Info: Published in: Phys. Rev. D 107 (2023) 11, 114027
P3H-22-100
Title: NNLO B-fragmentation fits and their application to top-quark pair production and decay at the LHC
Type: Paper
Authors: M. Czakon, T. Generet, A. Mitov, R. Poncelet
arXiv: 2210.06078
Info: Published in JHEP 03 (2023) 251
P3H-22-012
Title: $t\bar{t}b\bar{b}$ at the LHC: On the size of off-shell effects and prompt $b$-jet identification
Type: Paper
Authors: Giuseppe Bevilacqua, Huan-Yu Bi, Heribertus Bayu Hartanto, Manfred Kraus, Michele Lupattelli, Malgorzata Worek
arXiv: 2202.11186
Info: Published in Phys. Rev. D 107, 014028 (2023)
P3H-22-002
Title: NLO QCD corrections to full off-shell production of $t\bar{t}Z$ including leptonic decays
Type: Paper
Authors: Giuseppe Bevilacqua, Heribertus Bayu Hartanto, Manfred Kraus, Jasmina Nasufi and Malgorzata Worek
arXiv: 2203.15688
Info: Published in JHEP 08 (2022) 060
This website uses cookies. By using the website, you agree with storing cookies on your computer. Also you acknowledge that you have read and understand our Privacy Policy. If you do not agree leave the website.More information about cookies