{"paper":{"title":"Fragmentation functions from semi-inclusive DIS pion production and implications for the polarized parton densities","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"E. Christova (Sofiya, E. Leader (Imperial Coll.), Inst. Nucl. Res.), S. Kretzer (Michigan State Univ.)","submitted_at":"2001-08-06T12:56:18Z","abstract_excerpt":"By combining recent HERMES data on semi-inclusive DIS $\\pi^\\pm$-production with the singlet fragmentation function $D_\\Sigma^{\\pi^+}$, which is well determined from $e^+e^-$ data, we are able to extract, for the first time, the flavoured fragmentation functions $D_u^{\\pi^+}$, $D_d^{\\pi^+}$ and $D_s^{\\pi^+}$ without making any assumptions about favoured and unfavoured transitions. Whereas $D_u^{\\pi^+}$ and $D_d^{\\pi^+}$ are very well determined, the accuracy of $D_s^{\\pi^+}$ is limited by the uncertainty in evolving $D_\\Sigma^{\\pi^+}$ from the $Z^0$ pole down to the SIDIS scale of a few $(GeV)^"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0108055","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}