{"paper":{"title":"Bounds on the spacelike pion electromagnetic form factor from analyticity and unitarity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"B.Ananthanarayan, Irinel Caprini, I. Sentitemsu Imsong","submitted_at":"2012-06-06T11:39:31Z","abstract_excerpt":"We use the recently measured accurate BaBaR data on the modulus of the pion electromagnetic form factor, $F_\\pi(t)$, up to an energy of 3 GeV, the I=1 $P$-wave phase of the $\\pi\\pi$ scattering amplitude up to the $\\omega-\\pi$ threshold, the pion charge radius known from Chiral Perturbation Theory, and the recently measured JLAB value of $F_\\pi$ in the spacelike region at $t=-2.45 {\\rm GeV}^2$ as inputs in a formalism that leads to bounds on $F_\\pi$ in the intermediate spacelike region. We compare our constraints with experimental data and with perturbative QCD along with the results of several"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.1189","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"}