{"paper":{"title":"Radiative Decay $ B \\to l \\nu \\gamma $ in the Light Cone QCD Approach","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"G. Eilam, I. Halperin, R.R. Mendel","submitted_at":"1995-06-06T03:21:51Z","abstract_excerpt":"We calculate to the leading twist 2 accuracy the rate for the decay $ B_{u} \\rightarrow l \\nu \\gamma $ using the light cone QCD sume rules. We find $ Br( B_{u} \\rightarrow l \\nu \\gamma) \\simeq 2 \\cdot 10^{-6} $. The results are used to test the applicability of the constituent quark model approximation to the same process.The latter estimate is proportional to $ 1/m_{u}^{2} $, where $ m_{u} \\simeq \\bar{\\Lambda}_{u} $ is the \"constituent quark mass\", indicating that the process is of long distance type. We find that the two approaches yield similar results for the rate with the choice $ m_{u} \\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9506264","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"}