{"paper":{"title":"B->eta(') Form Factors in QCD","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"G.W.Jones, Patricia Ball","submitted_at":"2007-06-25T12:51:02Z","abstract_excerpt":"We calculate the semileptonic form factors $f_+^{B\\to \\eta}(q^2)$ and $f_+^{B\\to \\eta'}(q^2)$ from QCD sum rules on the light-cone (LCSRs), to NLO in QCD, and for small to moderate q^2, $0\\leq q^2\\leq 16 {\\rm\n  GeV}^2$. We include in particular the so-called singlet contribution, i.e.\\ weak annihilation of the B meson with the emission of two gluons which, thanks to the U(1)$_{\\rm A}$ anomaly, couple directly to $\\etap$. This effect is included to leading-twist accuracy. This contribution has been neglected in previous calculations of the form factors from LCSRs. We find that the singlet contr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.3628","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"}