{"paper":{"title":"Heavy-to-light scalar form factors from Muskhelishvili-Omn\\`es dispersion relations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"De-Liang Yao, F.-K. Guo, J. Nieves, M. Albaladejo, P. Fernandez-Soler","submitted_at":"2018-03-08T15:57:42Z","abstract_excerpt":"By solving the Muskhelishvili-Omn\\`es integral equations, the scalar form factors of the semileptonic heavy meson decays $D\\to\\pi \\bar \\ell \\nu_\\ell$, $D\\to \\bar{K} \\bar \\ell \\nu_\\ell$, $\\bar{B}\\to \\pi \\ell \\bar\\nu_\\ell$ and $\\bar{B}_s\\to K \\ell \\bar\\nu_\\ell$ are simultaneously studied. As input, we employ unitarized heavy meson-Goldstone boson chiral coupled-channel amplitudes for the energy regions not far from thresholds, while, at high energies, adequate asymptotic conditions are imposed. The scalar form factors are expressed in terms of Omn\\`es matrices multiplied by vector polynomials, w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.03171","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"}