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

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arxiv hep-ph/0112284 v2 pith:TDZGUAAW submitted 2001-12-20 hep-ph

Leif Lonnblad This is my paper · ORCID
classification hep-ph
keywords orderfixedelementsmatrixalphacascadecolour-dipolemodel
verification ladder T0 review T1 audit T2 compute T3 formal
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An algorithm is presented in which the Colour-Dipole Cascade Model as implemented in the Ariadne 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 alpha_S and to all orders with modified leading logarithmic (MLLA) accuracy. In this paper, matrix elements are used up to second order in alpha_S, but the scheme is applicable also for higher orders. An improvement to also include exact virtual corrections to fixed order is suggested and the possibility to extend the scheme to hadronic collisions is discussed.

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Cited by 4 Pith papers

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  1. Sudakov evolution without unitarity

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    Sunshine removes Sudakov factors from parton-shower sampling by keeping every intermediate state, giving direct tree-level expansions and enabling tests of matrix-element corrections.

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    hep-ex 2025-02 conditional novelty 7.0 of 10

    First direct measurement of r_q track-function moments in dijet events, showing consistency with non-linear RG flow predictions.

  3. Optimal-Transport-Based Cell Resampling for Negative and Pathological Event Weights

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    IRC-safe optimal-transport metrics (EMD, sEMD) enable lower-bias cell resampling of negative-weight NLO Monte Carlo events without intermediate jet clustering.

  4. Recoil-Safe Subtraction, Matching and Merging in e+e- to hadrons

    hep-ph 2025-07 conditional novelty 6.0 of 10

    The Alaric shower is matched to NLO matrix elements and merged to five jets in e+e- to hadrons, with new analytic subtraction terms validated against Catani-Seymour subtraction.

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