{"paper":{"title":"Chiral Dynamics and S-wave contributions in Semileptonic $D_s/B_s$ decays into $\\pi^+\\pi^-$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Wei Wang, Yu-Ji Shi","submitted_at":"2015-07-28T09:22:04Z","abstract_excerpt":"In this work, we study the semileptonic decay modes $B_s^0\\to \\pi^+\\pi^-\\ell^+\\ell^-$ and $D_s^+\\to \\pi^+\\pi^-\\ell^+ \\nu$ in the kinematics region where the $\\pi^+\\pi^-$ system has a invariant mass in the range $0.5$-$1.3$ GeV. These processes are valuable towards the determination of S-wave $\\pi^+\\pi^-$ light-cone distribution amplitudes whose normalizations are scalar form factors. We compare the results for scalar form factors predicted in unitarized chiral perturbation theory and extracted from the data on the $B_s\\to J/\\psi \\pi^+\\pi^-$. Then the $B_s\\to \\pi^+\\pi^-$ and $D_s\\to \\pi^+\\pi^-$"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.07692","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"}