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

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dc.citation.articleNumber032003
dc.citation.issueNumber3
dc.citation.journalTitlePhysical Review D
dc.citation.volumeNumber100
dc.contributor.authorAbouzaid, E.
dc.contributor.authorArenton, M.
dc.contributor.authorBarker, A.R.
dc.contributor.authorBellantoni, L.
dc.contributor.authorBlucher, E.
dc.contributor.authorBock, G.J.
dc.contributor.authorCheu, E.
dc.contributor.authorColeman, R.
dc.contributor.authorCorcoran, M.D.
dc.contributor.authorCox, B.
dc.contributor.authorErwin, A.R.
dc.contributor.authorEscobar, C.O.
dc.contributor.authorGlazov, A.
dc.contributor.authorGolossanov, A.
dc.contributor.authorGomes, R.A.
dc.contributor.authorGouffon, P.
dc.contributor.authorHsiung, Y.B.
dc.contributor.authorJensen, D.A.
dc.contributor.authorKessler, R.
dc.contributor.authorKotera, K.
dc.contributor.authorLedovskoy, A.
dc.contributor.authorMcBride, P.L.
dc.contributor.authorMonnier, E.
dc.contributor.authorNguyen, H.
dc.contributor.authorNiclasen, R.
dc.contributor.authorPhillips, D.G.
dc.contributor.authorRamberg, E.J.
dc.contributor.authorRay, R.E.
dc.contributor.authorRonquest, M.
dc.contributor.authorSantos, E.
dc.contributor.authorSlater, W.
dc.contributor.authorSmith, D.
dc.contributor.authorSolomey, N.
dc.contributor.authorSwallow, E.C.
dc.contributor.authorToale, P.A.
dc.contributor.authorTschirhart, R.
dc.contributor.authorWah, Y.W.
dc.contributor.authorWang, J.
dc.contributor.authorWhite, H.B.
dc.contributor.authorWhitmore, J.
dc.contributor.authorWilking, M.J.
dc.contributor.authorWinstein, B.
dc.contributor.authorWinston, R.
dc.contributor.authorWorcester, E.T.
dc.contributor.authorYamanaka, T.
dc.contributor.authorZimmerman, E.D.
dc.contributor.authorZukanovich, R.F.
dc.date.accessioned2021-10-06T14:15:27Z
dc.date.available2021-10-06T14:15:27Z
dc.date.issued2019
dc.description.abstractWe present a measurement of B(π0→e+e−γ)/B(π0→γγ), 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→γγγγe+e−γ decays. We normalize to KL→π0π0π0→6γ decays. We find B(π0→e+e−γ)/B(π0→γγ) (me+e−>15 MeV/c2)=[3.920±0.016(stat)±0.036(syst)]×10−3. Using the Mikaelian and Smith prediction for the e+e− mass spectrum, we correct the result to the full e+e− mass range. The corrected result is B(π0→e+e−γ)/B(π0→γγ)=[1.1559±0.0047(stat)±0.0106(syst)]%. This result is consistent with previous measurements, and the uncertainty is a factor of 3 smaller than any previous measurement.
dc.identifier.citationAbouzaid, E., Arenton, M., Barker, A.R., et al.. "Measurement of the branching ratio of π0 Dalitz decay using KL→π0π0π0 decays." <i>Physical Review D,</i> 100, no. 3 (2019) American Physical Society: https://doi.org/10.1103/PhysRevD.100.032003.
dc.identifier.digitalPhysRevD-100-032003
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.100.032003
dc.identifier.urihttps://hdl.handle.net/1911/111453
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.rightsPublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleMeasurement of the branching ratio of π0 Dalitz decay using KL→π0π0π0 decays
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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