{"paper":{"title":"Matching NLO QCD computations with Parton Shower simulations: the POWHEG method","license":"","headline":"The POWHEG method interfaces NLO QCD calculations with parton shower simulations without double-counting or inconsistencies.","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Carlo Oleari, Paolo Nason, Stefano Frixione","submitted_at":"2007-09-13T17:49:16Z","abstract_excerpt":"The aim of this work is to describe in detail the POWHEG method, first suggested by one of the authors, for interfacing parton-shower generators with NLO QCD computations. We describe the method in its full generality, and then specify its features in two subtraction frameworks for NLO calculations: the Catani-Seymour and the Frixione-Kunszt-Signer approach. Two examples are discussed in detail in both approaches: the production of hadrons in e+e- collisions, and the Drell-Yan vector-boson production in hadronic collisions."},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The POWHEG method allows interfacing parton-shower generators with NLO QCD computations in its full generality, and specifies its features in the Catani-Seymour and Frixione-Kunszt-Signer subtraction frameworks, with detailed examples for e+e- hadron production and Drell-Yan vector-boson production.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The method assumes that modifying the parton shower to begin from the hardest emission determined by the NLO calculation preserves accuracy and avoids inconsistencies across different subtraction schemes and processes.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"The POWHEG method provides a general framework to interface NLO QCD computations with parton showers using Catani-Seymour and Frixione-Kunszt-Signer subtraction schemes, illustrated with e+e- hadron production and Drell-Yan processes.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"The POWHEG method interfaces NLO QCD calculations with parton shower simulations without double-counting or inconsistencies.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"afa47c2ac85c50cf184fa872caec1bc5b1e579244e5637bc274a739904e28644"},"source":{"id":"0709.2092","kind":"arxiv","version":1},"verdict":{"id":"dd8e1548-0b8c-4115-a083-cb0869f1a4dd","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T21:48:38.171351Z","strongest_claim":"The POWHEG method allows interfacing parton-shower generators with NLO QCD computations in its full generality, and specifies its features in the Catani-Seymour and Frixione-Kunszt-Signer subtraction frameworks, with detailed examples for e+e- hadron production and Drell-Yan vector-boson production.","one_line_summary":"The POWHEG method provides a general framework to interface NLO QCD computations with parton showers using Catani-Seymour and Frixione-Kunszt-Signer subtraction schemes, illustrated with e+e- hadron production and Drell-Yan processes.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The method assumes that modifying the parton shower to begin from the hardest emission determined by the NLO calculation preserves accuracy and avoids inconsistencies across different subtraction schemes and processes.","pith_extraction_headline":"The POWHEG method interfaces NLO QCD calculations with parton shower simulations without double-counting or inconsistencies."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0709.2092/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":38,"sample":[{"doi":"","year":2002,"title":"M. Dobbs, Phys. Rev. D 65 (2002) 094011 [arXiv:hep-ph/0111234]","work_id":"be533741-4d97-4cd5-bf36-a6c90c4141a3","ref_index":1,"cited_arxiv_id":"hep-ph/0111234","is_internal_anchor":true},{"doi":"","year":2002,"title":"Matching NLO QCD computations and parton shower simulations","work_id":"42811f36-bc95-40a3-a267-0d5d421a96c4","ref_index":2,"cited_arxiv_id":"hep-ph/0204244","is_internal_anchor":false},{"doi":"","year":2003,"title":"Kurihara et al","work_id":"7e380a6b-7471-4f42-a810-2c05a60c65c2","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2004,"title":"A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms","work_id":"5ba04012-0596-4e5f-8cea-f7bd96aca319","ref_index":4,"cited_arxiv_id":"hep-ph/0409146","is_internal_anchor":true},{"doi":"","year":2005,"title":"Matching parton showers to NLO computations","work_id":"8e795634-fa45-4056-ba13-10277739ca5b","ref_index":5,"cited_arxiv_id":"hep-ph/0503053","is_internal_anchor":false}],"resolved_work":38,"snapshot_sha256":"bf60660199d596b6e27fef3934cbdbbfb188d29633f2fa1b2e40d72db0ae23e3","internal_anchors":8},"formal_canon":{"evidence_count":1,"snapshot_sha256":"f7a3a6690c01946b56ad441f6f306723500e9191492a723c75123c5674e231cb"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}