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Precise determination of the branching ratio of the neutral-pion Dalitz decay

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dc.contributor.author	Husek, Tomas
dc.contributor.author	Goudzovski, Evgueni
dc.contributor.author	Kampf, Karol
dc.date.accessioned	2020-06-01T09:30:50Z
dc.date.available	2020-06-01T09:30:50Z
dc.date.issued	2019
dc.identifier.citation	Husek, Tomas Goudzovski, Evgueni Kampf, Karol 2019 Precise determination of the branching ratio of the neutral-pion Dalitz decay Physical Review Letters 122 022003
dc.identifier.uri	https://hdl.handle.net/10550/74791
dc.description.abstract	We provide a new value for the ratio R=Γ(π0→e+e−γ(γ))/Γ(π0→γγ)=11.978(6)×10^−3, which is by 2 orders of magnitude more precise than the current Particle Data Group average. It is obtained using the complete set of the next-to-leading-order radiative corrections in the QED sector, and incorporates up-to-date values of the π0-transition-form-factor slope. The ratio R translates into the branching ratios of the two main π0 decay modes: B(π0→γγ)=98.8131(6)% and B(π0→e+e−γ(γ))=1.1836(6)%.
dc.language.iso	eng
dc.relation.ispartof	Physical Review Letters, 2019, vol. 122, num. 022003
dc.subject	Partícules (Física nuclear)
dc.subject	Teoria electromagnètica
dc.title	Precise determination of the branching ratio of the neutral-pion Dalitz decay
dc.type	journal article	es_ES
dc.date.updated	2020-06-01T09:30:51Z
dc.identifier.doi	10.1103/PhysRevLett.122.022003
dc.identifier.idgrec	139233
dc.rights.accessRights	open access	es_ES