2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/95986We give a prescription for attaching parton showers to next-to-leading order (NLO) partonic jet cross sections in electron-positron annihilation. Our method effectively extends to NLO the scheme of Catani, Krauss, Kuhn, and Webber for matching between m hard jets and (m+1) hard jets. The matching between parton splitting as part of a shower and parton splitting as part of NLO matrix elements is based on the Catani-Seymour dipole subtraction method that is commonly used for removing the singularities from the NLO matrix elements.}45 pages, new introduction, more detailed discussion of the Sudakov reweightingHigh Energy Physics - Phenomenologytext