Measurement of the e⁺e⁻ → π⁺π⁻π⁰π⁰ Cross Section Using Initial-State Radiation at BABAR

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dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.authorLees, J. P.en_US
dc.contributor.authorPoireau, V.en_US
dc.contributor.authorTisserand, V.en_US
dc.contributor.authorGrauges, E.en_US
dc.contributor.authorPalano, A.en_US
dc.contributor.authorEigen, G.en_US
dc.contributor.authorBrown, D. N.en_US
dc.contributor.authorBaBar Collaborationen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2018-10-22T19:26:58Z
dc.date.available2018-10-22T19:26:58Z
dc.date.created2017-11-29en_US
dc.date.issued2018-10-22
dc.description.abstractThe process e⁺e⁻ → π⁺π⁻ 2π⁰γ is investigated by means of the initial-state radiation technique, where a photon is emitted from the incoming electron or positron. Using 454.3 fb⁻¹ of data collected around a center of- mass energy of √s = 10.58 GeV by the BABAR experiment at SLAC, approximately 150000 signal events are obtained. The corresponding nonradiative cross section is measured with a relative uncertainty of 3.6% in the energy region around 1.5 GeV, surpassing all existing measurements in precision. Using this new result, the channel's contribution to the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon is calculated as (g(μ)(π⁺π⁻ 2π⁰) - 2)/2 = (17.9 ± 0.1(stat) ± 0.6(syst)) x 10⁻¹⁰ in the energy range 0.85 < E(CM) < 1.8 GeV. In the same energy range, the impact on the running of the fine-structure constant at the Z⁰-pole is determined as Δα(π⁺π⁻ 2π⁰) (M(z)²) = (4.44 ± 0.02 (stat) ± 0.14 (syst)) x 10⁻⁴. Furthermore, intermediate resonances are studied and especially the cross section of the process e⁺e⁻ → ωπ⁰ → π⁺π⁻ 2π⁰ is measured.en_US
dc.identifier.bibliographicCitationLees, J. P., V. Poireau, V. Tisserand, E. Grauges, et al. 2017. "Measurement of the e⁺e⁻ → π⁺π⁻π⁰π⁰ cross section using initial-state radiation at BABAR." Physical Review D 96(9), doi:10.1103/PhysRevD.96.092009en_US
dc.identifier.issn2470-0010en_US
dc.identifier.issue9en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/6206
dc.identifier.volume96en_US
dc.language.isoenen_US
dc.publisherAmer Physical Socen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevD.96.092009
dc.rightsen_US
dc.rights©2017 American Physical Societyen_US
dc.sourcePhysical Review D
dc.subjectPhotonsen_US
dc.subjectStorage-ringen_US
dc.subjectFinal-statesen_US
dc.subjectMonte-carloen_US
dc.subjectAnnihilationen_US
dc.subjectDetectoren_US
dc.subjectCollisionsen_US
dc.subjectAstronomy & astrophysicsen_US
dc.subjectPhysicsen_US
dc.titleMeasurement of the e⁺e⁻ → π⁺π⁻π⁰π⁰ Cross Section Using Initial-State Radiation at BABARen_US
dc.type.genrearticleen_US

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Izen, Joseph M.