Correcting the Colour-Dipole Cascade Model with Fixed Order Matrix Elements

By L. Lonnblad. 2001

210 citations recorded by the source corpus.

An algorithm is presented in which the Colour-Dipole Cascade Model as implemented in the A RIADNE program is corrected to match the ﬁxed order tree-level matrix elements for e + e − → n jets. The result is a full parton level generator for e + e − annihilation where the generated states are correct on tree-level to ﬁxed order in α s and to all orders with modiﬁed leading logarithmic (MLLA) accuracy. In this paper, matrix elements are used up to second order in α s , but the scheme is applicable also for higher orders. A strategy for also including exact virtual corrections to ﬁxed order is suggested and the possibility to extend the scheme to hadronic collisions is discussed.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2b347810f2bb0b59a6d995a8a73db3ee8a6dffef

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In Nuclear and High Energy Physics

Citations in the corpus

Event generation with SHERPA 1.1 (2008, methodology): “A similar algorithm for the dipole shower has been discussed in [21], whereas a more different one has been published in [22].”
MINLO: multi-scale improved NLO (2012, methodology): “1 In the context of leading order matrix element-parton shower merging algorithms [4–9], an unbiased method for assigning the factorization and renormalization scales is essential and put to good effect.”
QCD Radiation in the Production of Heavy Colored Particles at the LHC (2008, methodology): “Several algoritms have been proposed to achieve this, including the CKKW [8, 9], Lönnblad [10] and Mangano [11, 12] schemes.”
A comprehensive approach to new physics simulations (2009, methodology): “Here also, significant progress has been made in the development of matching algorithms such as that by Catani, Krauss, Kuhn and Webber (CKKW) [30, 31, 32], Mangano (MLM) [33] and others [34, 35, 36], in their comparison [37, 38] and application to SM [33, 39] and BSM [40] processes.”
General-purpose event generators for LHC physics (2011, methodology): “• Multi-jet merging at LO: Another active area of developments in the last decade has been the treatment of multi-jet topologies, starting with the merging algorithm by Catani, Kuhn, Krauss and Webber (CKKW) [70] and a similar procedure developed in parallel by Lönnblad (later coined CKKW-L) [71].”
QCD matrix elements and truncated showers (2009, methodology): “2 Correspondence to the CKKW-L method In order to see the relation of the algorithm proposed here with the CKKW-L prescription presented in [13], let us concentrate first on the case of pure final-state radiation.”
QCD matrix elements + parton showers. The NLO case (2012, background): “Either one chooses to veto matrix element configurations where the boundary between matrix element and parton shower regions would be crossed multiple times and fills these regions entirely with the parton shower [32,37].”
NLO QCD matrix elements + parton showers in e+e− → hadrons (2012, background): “They were pioneered in [1–4] and further matured in [5–8].”
Event generation with Sherpa 2.2 (2019, background): “Originally these ideas have been proposed for the combination of tree-level matrix elements in [26, 27], and have been implemented, in variations, in all event generators [124, 125, 126, 127, 28, 128, 129, 29, 130, 131].”
Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA (2003, methodology): “A method similar to the one described below was used in [32], but it is generalized here.”