{"paper":{"title":"A Measurement of the Branching Ratio of $\\pi^0$ Dalitz Decay using $K_L \\rightarrow \\pi^0\\pi^0\\pi^0$ Decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Glazov, A. Golossanov, A. Ledovskoy, A.R. Barker, A.R. Erwin, B. Cox, B. Winstein, C.O. Escobar, D.A. Jensen, D.G. Phillips II, D. Smith, E. Abouzaid, E. Blucher, E. Cheu, E.C. Swallow, E. D. Zimmerman, E.J. Ramberg, E. Monnier, E. Santos, E.T. Worcester, G.J. Bock, H.B. White, H. Nguyen, J. Wang, J. Whitmore, K. Kotera, L. Bellantoni, M. Arenton, M.D. Corcoran, M. J. Wilking, M. Ronquest, N. Solomey, P.A. Toale, P. Gouffon, P.L. McBride, R.A. Gomes, R. Coleman, R.E. Ray, R.F. Zukanovich, R. Kessler, R. Niclasen, R. Tschirhart, R. Winston, T. Yamanaka, W. Slater, Y.B. Hsiung, Y.W. Wah","submitted_at":"2019-02-04T18:43:57Z","abstract_excerpt":"We present a measurement of $B(\\pi^0 \\rightarrow e^+e^- \\gamma)/B(\\pi^0 \\rightarrow \\gamma\\gamma)$, the Dalitz branching ratio, using data taken in 1999 by the E832 KTeV experiment at Fermi National Accelerator Laboratory. We use neutral pions from fully reconstructed $K_L$ decays in flight; the measurement is based on about 60 thousand $K_L \\rightarrow \\pi^0\\pi^0\\pi^0 \\rightarrow \\gamma\\gamma~\\gamma\\gamma~e^+e^-\\gamma$ decays. We normalize to $K_L \\rightarrow \\pi^0\\pi^0\\pi^0 \\rightarrow 6\\gamma$ decays. We find $B(\\pi^0 \\rightarrow e^+e^- \\gamma)/B(\\pi^0 \\rightarrow \\gamma\\gamma)$ $(m_{e^+e^-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.01375","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1902.01375/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}