Measurement of the e⁺e⁻ → π⁺π⁻ Cross Section between 600 and 900 MeV Using Initial State Radiation

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dc.contributor.ORCID0000-0003-0867-2189 (Lou, X)en_US
dc.contributor.authorAblikim, M.en_US
dc.contributor.authorAchasov, M. N.en_US
dc.contributor.authorAi, X. C.en_US
dc.contributor.authorAlbayrak, O.en_US
dc.contributor.authorAlbrecht, M.en_US
dc.contributor.authorAmbrose, D. J.en_US
dc.contributor.authorAmoroso, A.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorBESIII Collaborationen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2016-09-26T21:44:36Z
dc.date.available2016-09-26T21:44:36Z
dc.date.created2015-11-28en_US
dc.date.issued2015-11-28en_US
dc.description.abstractWe extract the e⁺e⁻ → π⁺π⁻ cross section in the energy range between 600 and 900 MeV, exploiting the method of initial state radiation. A data set with an integrated luminosity of 2.93 fb⁻¹ taken at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider is used. The cross section is measured with a systematic uncertainty of 0.9%. We extract the pion form factor |Fπ|² as well as the contribution of the measured cross section to the leading-order hadronic vacuum polarization contribution to (g - 2)μ. We find this value to be a(μ)^{ππ,LO} (600-900 MeV) = (368.2 ± 2.5(stat) ± 3.3(sys)).10⁻¹⁰, which is between the corresponding values using the BaBar or KLOE data.en_US
dc.identifier.bibliographicCitationAblikim, M., M. N. Achasov, X. C. Ai, O. Albayrak, et al. 2016. "Measurement of the e⁺e⁻ → pi(+) pi(-) cross section between 600 and 900 MeV using initial state radiation." Physics Letters B 753, doi:10.1016/j.physletb.2015.11.043en_US
dc.identifier.issn0370-2693en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5080
dc.identifier.volume753en_US
dc.language.isoenen_US
dc.publisherElsevier Science BVen_US
dc.relation.urihttp://dx.doi.org/10.1016/j.physletb.2015.11.043
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2015 The Authorsen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourcePhysics Letters B
dc.subjectMuonsen_US
dc.subjectPionsen_US
dc.subjectElectronsen_US
dc.subjectElectron-positron interactionsen_US
dc.subjectAnnihilation reactionsen_US
dc.subjectHadronsen_US
dc.subjectParticles (Nuclear physics)—Flavoren_US
dc.titleMeasurement of the e⁺e⁻ → π⁺π⁻ Cross Section between 600 and 900 MeV Using Initial State Radiationen_US
dc.type.genreArticleen_US

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