Top++: A program for the calculation of the top-pair cross-section at hadron colliders

By Michal Czakon, Alexander Mitov. Computer Physics Communications, 2011

1,789 citations recorded by the source corpus.

Abstract We present the program Top++ for the numerical evaluation of the total inclusive cross-section for producing top quark pairs at hadron colliders. The program calculates the cross-section in (a) fixed order approach with exact next-to-next-to leading order (NNLO) accuracy and (b) by including soft-gluon resummation for the hadronic cross-section in Mellin space with full next-to-next-to-leading logarithmic (NNLL) accuracy. The program offers the user significant flexibility through the large number (29) of available options. Top++ is written in C++. It has a very simple to use interface that is intuitive and directly reflects the physics. The running of the program requires no programming experience from the user. Program summary Program title: Top++ (ver. 2.0) Catalogue identifier: AETR_v1_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AETR_v1_0.html Program obtainable from: CPC Program Library, Queen’s University, Belfast, N. Ireland Licensing provisions: GNU General Public License No. of lines in distributed program, including test data, etc.: 15 896 No. of bytes in distributed program, including test data, etc.: 695 919 Distribution format: tar.gz Programming language: C++. Computer: any running a unix operating system. Program was developed and tested with GNU Compiler Collection, C++ compiler. Operating system: Linux; Mac OS X; can be adapted for other unix systems. RAM: typically less than 200 MB. Classification: 11.1. External routines: GNU Scientific Library (GSL); the Les Houches Accord pdf Interface (LHAPDF). Nature of problem: computation of the total cross-section in perturbative QCD. Solution method: numerical integration of the product of hard partonic cross-section (with or without soft gluon resummation) with two parton distribution functions. Additional comments: sub per-mill accuracy achievable in realistic time (program does not employ Monte Carlo methods). Running time: depending on the options. The program is optimized for speed.

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Citations in the corpus

Search for squarks and gluinos in events with isolated leptons, jets and missing transverse momentum at $\sqrt{s}=8$ TeV with the ATLAS detector (2015, unknown): “1 NNLO [66, 67] NLO CT10 Sherpa default tt̄ powheg-box r2129 NNLO+NNLL NLO CT10 Perugia2011C [69–71] [72, 73] [74] Single-top (t-channel) AcerMC 3.”
Search for additional heavy neutral Higgs and gauge bosons in the ditau final state produced in 36 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector (2017, methodology): “For tt̄ [108] and single top-quark [109, 110] production, the assigned 6% uncertainty is based on PDF, scale and top-quark mass variations.”
The PDF4LHC report on PDFs and LHC data: Results from Run I and preparation for Run II (2015, methodology): “The predictions of tt̄ production are calculated using the TOP++ program [219].”
Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at root s=8 TeV with the ATLAS detector (2015, unknown): “0 [78], are used in the normalization of the t t̄ [79] and Wt [80] samples.”
Search for electroweak production of supersymmetric particles in final states with two or three leptons at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\odd (2018, methodology): “The matrix elements containing all diagrams with four electroweak vertices with additional hard parton emissions were calculated with Comix [41] and virtual QCD corrections were calculated with OpenLoops [42].”
Measurement of differential cross sections for top quark pair production using the lepton+jets final state in proton-proton collisions at 13 TeV (2016, methodology): “When compared to the data, simulations are normalized to an inclusive tt production cross section of 832+40 −46 pb [20].”
Search for additional heavy neutral Higgs and gauge bosons in the ditau final state produced in 36 fb−1 of pp collisions at s=13$$ \sqrt{s}=13 $$ TeV with the ATLAS detector (2018, methodology): “For tt̄ [108] and single top-quark [109, 110] production, the assigned 6% uncertainty is based on PDF, scale and top-quark mass variations.”
Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton–proton collisions at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepac (2017, background): “Muon channel - μ±μ±μ∓ μ±μ± μ±μ±μ∓ μ±μ± μ±μ±μ∓ m(e±e±) [GeV] [130, 2000] [90, 200) [60, 150) [130, 200) [90, 200) [150, 200) [200,∞) [200,∞) [200,∞) m(`±`±) [GeV] - [90, 200) [130, 200) [90, 200) [200,∞) [200,∞) m(μ±μ±) [GeV] - [60, 200) [60, 200) [60, 200) [200,∞) [200,∞)”
Search for new high-mass phenomena in the dilepton final state using 36 fb$^{-1}$ of proton-proton collision data at $\sqrt{s}$ = 13 TeV with the ATLAS detector (2017, methodology): “0 program [35], which is accurate to NNLO in perturbative QCD, including resummation of next-to-next-to-leading logarithmic soft gluon terms.”