Measurement of the branching ratio of π0 Dalitz decay using KL → π0π0π0 decays

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dc.creatorAbouzaid, Erin Elizabeth
dc.creatorArenton, Michael
dc.creatorBarker, A. R.
dc.creatorBellantoni, Leo
dc.creatorBlucher, Edward
dc.creatorBock, Gregory J.
dc.creatorCheu, Elliott
dc.creatorColeman, R.
dc.creatorCorcoran, M. D.
dc.creatorCox, Brad
dc.creatorGomes, Ricardo Avelino
dc.date.accessioned2023-05-30T15:45:47Z
dc.date.available2023-05-30T15:45:47Z
dc.date.issued2019
dc.description.abstractWe present a measurement of Bðπ0 → eþe−γÞ=Bðπ0 → γγÞ, 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 KL decays in flight; the measurement is based on ∼60 thousand KL → π0π0π0 → γγγγeþe−γ decays. We normalize to KL → π0π0π0 → 6γ decays. We find Bðπ0 → eþe−γÞ=Bðπ0 → γγÞ ðmeþe− > 15 MeV=c2Þ¼½3.920 0.016ðstatÞ 0.036ðsystÞ × 10−3. Using the Mikaelian and Smith prediction for the eþe− mass spectrum, we correct the result to the full eþe− mass range. The corrected result is Bðπ0 → eþe−γÞ=Bðπ0 → γγÞ¼½1.1559 0.0047ðstatÞ 0.0106ðsystÞ %. This result is consistent with previous measurements, and the uncertainty is a factor of 3 smaller than any previous measurement.pt_BR
dc.identifier.citationABOUZAID, E. et al. Measurement of the branching ratio of Dalitz decay using decays. Physical Review D, Washington, v. 100, n. 3, e032003, 2019. DOI: 10.1103/PhysRevD.100.032003. Disponível em: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.032003. Acesso em: 16 maio 2023.pt_BR
dc.identifier.doi10.1103/PhysRevD.100.032003
dc.identifier.issne- 2470-0029
dc.identifier.issn2470-0010
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/22638
dc.language.isoengpt_BR
dc.publisher.countryEstados unidospt_BR
dc.publisher.departmentInstituto de Física - IF (RMG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleMeasurement of the branching ratio of π0 Dalitz decay using KL → π0π0π0 decayspt_BR
dc.typeArtigopt_BR

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