Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations

By P. Artoisenet, R. Frederix, Olivier Mattelaer, Robbert Rietkerk. 2012

747 citations recorded by the source corpus.

A bstractWe present a general method that allows one to decay narrow resonances in Les Houches Monte Carlo events in an efficient and accurate way. The procedure preserves both spin correlation and finite width effects to a very good accuracy, and is therefore particularly suited for the decay of resonances in production events generated at next-to-leading-order accuracy. The method is implemented as a generic tool in the Mad-Graph5 framework, giving access to a very large set of possible applications. We illustrate the validity of the method and the code by applying it to the case of single top and top quark pair production, and show its capabilities on the case of top quark pair production in association with a Higgs boson.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/81550b05884e7dd9eaaf774bb033f5eb46cdbfa5

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In Nuclear and High Energy Physics

Citations in the corpus

Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, methodology): “In this context a generic framework dubbed MADSPIN [163] has recently been proposed to decay heavy resonances in next-to-leading-order Monte Carlo events.”
Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV (2017, methodology): “Diboson WW, WZ, and ZZ events, referred to collectively as “VV” events, are generated at NLO accuracy with the MadGraph5_amc@nlo 2.2.2 generator [22], including MadSpin [23] and the FxFx merging scheme [24] between jets from matrix element calculations and the parton shower description, or with the ”
Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV (2017, methodology): “2 generator [22], including MADSPIN [23] and the FxFx merging scheme [24] between jets from matrix element calculations and the parton shower description, or with the POWHEG 2.”
Combined measurements of Higgs boson production and decay using up to $80$ fb$^{-1}$ of proton-proton collision data at $\sqrt{s}=$ 13 TeV collected with the ATLAS experiment (2019, methodology): “Higgs boson production in association with a bb̄ pair (bb̄H) was simulated using MADGRAPH5_AMC@NLO [93] with NNPDF2.”
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations (2014, background): “[213]; the corresponding module in the code has been dubbed MadSpin40.”
What is the γγ resonance at 750 GeV? (2015, neutral): “Resonances are decayed using MadSpin [55].”
Automated event generation for loop-induced processes (2015, methodology): “First, the list of external tools (Pythia6 [78], Delphes [87], MadSpin [88], .”
Search for the standard model Higgs boson produced in association with top quarks and decaying into a bb¯ pair in pp collisions at √s=13 TeV with the ATLAS detector (2018, methodology): “The top quarks were decayed using MADSPIN [50], preserving all spin correlations.”
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider (2019, methodology): “If couplings that allow LLP decay are included in the UFO model, then the decays can be performed directly at the matrix-element level in programs such as MadGraph5_aMC@NLO [219] and accompanying packages such as MadSpin [220].”
Higgs Physics at the HL-LHC and HE-LHC (2019, methodology): “The MADSPIN package [361] was used for the Higgs boson decays and PYTHIA 8 [319] for the showering and hadronisation of events.”
Simplified dark matter models with two Higgs doublets: I. Pseudoscalar mediators (2017, methodology): “In this analysis the DM signal has been simulated at next-to-leading order (NLO) with MadGraph5_aMC@NLO and PYTHIA 8.2 using a FxFx NLO jet matching prescription [105] and the final-state top quarks have been decayed with MadSpin [106].”
Measurement of the differential cross section for top quark pair production in pp collisions at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin} (2015, methodology): “The MADSPIN [18] package is used to incorporate spin correlation effects with matrix elements for up to three additional partons.”
Probing top quark neutral couplings in the Standard Model Effective Field Theory at NLO in QCD (2016, methodology): “1) The BR(Z → `+`−) is taken from MadSpin [46].”
New observables in inclusive production of quarkonia (2019, methodology): “The spin-correlated decay Z → e+e− was done thanks to MadSpin [432] and the NLO calculation of pp → Z → e+e− was matched to the parton showers provided by Pythia8.”
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, positive): “Additionally, top-quark spin correlations were preserved through the use of MadSpin [59].”
Searches for electroweak production of supersymmetric particles with compressed mass spectra in √s = 13 TeV pp collisions with the ATLAS detector (2019, neutral): “The electroweakinos were decayed with MadSpin [55].”