Higher-order corrections to timelike jets

By W. Giele, David A. Kosower, Peter Z. Skands. 2011

133 citations recorded by the source corpus.

We present a simple formalism for the evolution of timelike jets in which tree-level matrix element corrections can be systematically incorporated, up to arbitrary parton multiplicities and over all of phase space, in a way that exponentiates the matching corrections. The scheme is cast as a shower Markov chain which generates one single unweighted event sample, that can be passed to standard hadronization models. Remaining perturbative uncertainties are estimated by providing several alternative weight sets for the same events, at a relatively modest additional overhead. As an explicit example, we consider Z {yields} q{bar q} evolution with unpolarized, massless quarks and include several formally subleading improvements as well as matching to tree-level matrix elements through {alpha}{sub s}{sup 4}. The resulting algorithm is implemented in the publicly available VINCIA plugin to the PYTHIA8 event generator.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/214adcaaf4fabdf8f410602d578e6a2a2df43171

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In Nuclear and High Energy Physics

Citations in the corpus

Jet substructure at the Large Hadron Collider: A review of recent advances in theory and machine learning (2017, background): “Six parton shower generators—Pythia 8.205, Herwig++ 2.7.1, Sherpa 2.1.1, Vincia 1.201, Deductor 1.0.2, and Ariadne 5.0.”
NLO QCD matrix elements + parton showers in e+e− → hadrons (2012, background): “They were pioneered in [1–4] and further matured in [5–8].”
Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, methodology): “It includes a native p⊥-ordered parton shower supplemented with matrix-element corrections and multiple choices of recoil scheme, and further supports the VINCIA [1009, 1010] and DIRE [492] parton shower plugins.”
Les Houches 2015: Physics at TeV Colliders Standard Model Working Group Report (2016, methodology): “The same method is also used in the Vincia parton shower to calculate uncertainty variations for different scales, finite terms of the antenna functions, ordering parameters and sub-leading colour corrections [518].”
Reweighting QCD matrix-element and parton-shower calculations (2016, methodology): “The same method is also used in the Vincia parton shower to calculate uncertainty variations for different scales, finite terms of the antenna functions, ordering parameters and sub-leading colour corrections [28].”
Systematics of quark/gluon tagging (2017, unknown): “001 [46], which includes “smooth ordering” and LO matrix-element corrections [116] up to O(α3 s) for both e+e− → qq̄ and e+e− → gg.”
Tuning PYTHIA 8.1: the Monash 2013 tune (2014, methodology): “Instead, we use the VINCIAROOT plotting tool [24], which we have here upgraded to include a simple χ2 calculation, the result of which is shown on each plot.”
String formation beyond leading colour (2015, unknown): “(Plots made with VINCIAROOT [112].”