Measurement of the e + e − → π + π − π⁰ cross section in the energy range 0.62–3.50 GeV at Belle II

Simple item page
dc.contributor.authorAdachi, I.
dc.contributor.authorAggarwal, L.
dc.contributor.authorAihara, H.
dc.contributor.authorAkopov, N.
dc.contributor.authorAloisio, A.
dc.contributor.authorAnh Ky, N.
dc.contributor.authorAsner, D.M.
dc.contributor.authorAtmacan, H.
dc.contributor.authorAushev, V.
dc.contributor.authorAversano, M.
dc.contributor.authorAyad, R.
dc.contributor.authorBabu, V.
dc.contributor.authorBae, H.
dc.contributor.authorBahinipati, S.
dc.contributor.authorBambade, P.
dc.contributor.authorBanerjee, S.
dc.contributor.authorBansal, S.
dc.contributor.authorBarrett, M.
dc.contributor.authorBaudot, J.
dc.contributor.authorBaur, A.
dc.contributor.authoret al.
dc.date.issued2024
dc.description.abstractWe report a measurement of the eþe− → πþπ−π0 cross section in the energy range from 0.62 to 3.50 GeV using an initial-state radiation technique. We use an eþe− data sample corresponding to 191 fb−1 of integrated luminosity, collected at a center-of-mass energy at or near the ϒð4SÞ resonance with the Belle II detector at the SuperKEKB collider. Signal yields are extracted by fitting the two-photon mass distribution in eþe− → πþπ−π0γ events, which involve a π0 → γγ decay and an energetic photon radiated from the initial state. Signal efficiency corrections with an accuracy of 1.6% are obtained from several control data samples. The uncertainty on the cross section at the ω and ϕ resonances is dominated by the systematic uncertainty of 2.2%. The resulting cross sections in the 0.62–1.80 GeV energy range yield a3π μ ¼ ½48.91 0.23ðstatÞ 1.07ðsystÞ × 10−10 for the leading-order hadronic vacuum polarization contribution to the muon anomalous magnetic moment. This result differs by 2.5 standard deviations from the most precise current determination.
dc.description.statementofresponsibilityBelle II Collaboration
dc.identifier.citationPhysical Review D (particles, fields, gravitation, and cosmology), 2024; 110(11):112005-1-112005-25
dc.identifier.doi10.1103/physrevd.110.112005
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.orcidDe La Motte, S.A. [0000-0003-3905-6805]
dc.identifier.urihttps://hdl.handle.net/2440/144512
dc.language.isoen
dc.publisherAmerican Physical Society (APS)
dc.relation.granthttp://purl.org/au-research/grants/arc/DP200101792
dc.relation.granthttp://purl.org/au-research/grants/arc/DP210101900
dc.relation.granthttp://purl.org/au-research/grants/arc/DP210102831
dc.relation.granthttp://purl.org/au-research/grants/arc/DE220100462
dc.relation.granthttp://purl.org/au-research/grants/arc/LE210100098
dc.relation.granthttp://purl.org/au-research/grants/arc/LE230100085
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. Funded by SCOAP3 .
dc.source.urihttps://doi.org/10.1103/physrevd.110.112005
dc.subjectParticle interactions; Particle production; Light mesons; Lepton colliders
dc.titleMeasurement of the e + e − → π + π − π⁰ cross section in the energy range 0.62–3.50 GeV at Belle II
dc.typeJournal article
pubs.publication-statusPublished online

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
hdl_144512.pdf
Size:
1.9 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download

Collections

Research Outputs