{"paper":{"title":"Vector Formfactors in Hard Pion Chiral Perturbation Theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Ilaria Jemos (Lund), Johan Bijnens","submitted_at":"2010-11-30T12:50:30Z","abstract_excerpt":"We use three-flavour hard pion Chiral Perturbation Theory (HPChPT) in both the heavy meson and a relativistic formulation to calculate the chiral logarithms $m^2\\log(m^2/\\mu^2)$ contributing to the formfactors of the $B_{(s)}\\rightarrow \\pi,K,\\eta$ and $D_{(s)}\\rightarrow \\pi,K,\\eta$ transitions at momentum transfer $q^2$ away from the endpoint $q^2_\\mathrm{max}=(m_B-m_M)^2$. We compare our results with CLEO $D\\to\\pi$ and $D\\to K$ data. We also calculate the Isgur-Wise function of the $B_{(s)}\\rightarrow D_{(s)}$ semileptonic decay away from the endpoint and the chiral logarithms for the pion "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.6531","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"}