{"paper":{"title":"The $\\rho \\gamma^* \\to \\pi (\\rho)$ transition form factors in the Perturbative QCD factorization approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Jun Hua, Shan Cheng, Ya-Lan Zhang, Zhen-jun Xiao","submitted_at":"2015-10-17T09:20:01Z","abstract_excerpt":"In this paper, we studied the $\\rho \\gamma^* \\to \\pi$ and $\\rho\\gamma^*\\to \\rho$ transition processes and made the calculations for the $\\rho\\pi$ transition form factor $Q^4 F_{\\rho\\pi}(Q^2)$ and the $\\rho$ meson electromagnetic form factors, $F_{\\rm LL, LT,TT}(Q^2)$ and $F_{1,2,3}(Q^2)$, by employing the perturbative QCD (PQCD) factorization approach. For the $\\rho \\gamma^* \\to \\pi$ transition, we found that the contribution to form factor $Q^4 F_{\\rho\\pi}(Q)$ from the term proportional to the distribution amplitude combination $\\phi^T_{\\rho}(x_1)\\phi^P_{\\pi}(x_2)$ is absolutely dominant, and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.05108","kind":"arxiv","version":1},"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"}