{"paper":{"title":"Radiatively Generated Parton Distributions of Real and Virtual Photons","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"E. Reya, I. Schienbein (Dortmund U.), M. Gluck","submitted_at":"1999-03-12T13:35:21Z","abstract_excerpt":"The parton content of real (P^2=0) and virtual (P^2\\neq 0) transverse photons \\gamma(P^2) is expressed in terms of perturbative pointlike and nonperturbative hadronic (VMD) components, employing recently updated parton distributions of pions and protons. The resulting parameter-free and perturbatively stable LO and NLO parton densities f^{\\gamma(P^2)}(x,Q^2) are smooth in P^2 and apply to all P^2 >= 0 whenever \\gamma(P^2) is probed at scales Q^2 >> P^2 where transverse photons also dominate physically relevant cross sections. Predictions are given for the structure function F_2^{\\gamma(P^2)}(x"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9903337","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"}