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A precision measurement of the 𝑝⁑(𝑒,𝑒′⁒𝑝)β’πœ‹0 reaction at threshold

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dc.contributor.authorChirapatpimol, K,
dc.contributor.authorShabestari, M. H.
dc.contributor.authorLindgren, R. A.
dc.contributor.authorFernΓ‘ndez RamΓ­rez, CΓ©sar
dc.date.accessioned2024-12-09T09:33:02Z
dc.date.available2024-12-09T09:33:02Z
dc.date.issued2015-05-13
dc.descriptionThis is an Accepted Manuscript of an article published by American Physical Society in " Physical Review Letters 114(19)", available at: https://doi.org/10.1103/PhysRevLett.114.192503
dc.descriptionEste es el manuscrito aceptado del artΓ­culo publicado por American Physical Society en "Physical Review Letters 114(19)", disponible en lΓ­nea: https://doi.org/10.1103/PhysRevLett.114.192503
dc.description.abstractNew results are reported from a measurement of πœ‹0 electroproduction near threshold using the 𝑝⁑(𝑒,𝑒′⁒𝑝)β’πœ‹0 reaction. The experiment was designed to determine precisely the energy dependence of 𝑠- and 𝑝-wave electromagnetic multipoles as a stringent test of the predictions of chiral perturbation theory (ChPT). The data were taken with an electron beam energy of 1192 MeV using a two-spectrometer setup in Hall A at Jefferson Lab. For the first time, complete coverage of the πœ™*πœ‹ and πœƒ*πœ‹ angles in the π‘β’πœ‹0 center of mass was obtained for invariant energies above threshold from 0.5 up to 15 MeV. The 4-momentum transfer 𝑄2 coverage ranges from 0.05 to 0.155  (GeV/𝑐)2 in fine steps. A simple phenomenological analysis of our data shows strong disagreement with 𝑝-wave predictions from ChPT for 𝑄2>0.07  (GeV/𝑐)2, while the 𝑠-wave predictions are in reasonable agreement.en
dc.description.versionversiΓ³n final
dc.identifier.citationChirapatpimol, K & Shabestari, M & Lindgren, Richard & Smith, L & Annand, (et al) (2015). Precision Measurement of the p(e,eβ€²p)Ο€0 Reaction at Threshold. Physical review letters. 114. 192503.
dc.identifier.doihttps://doi.org/10.1103/PhysRevLett.114.192503
dc.identifier.issn1079-7114, 0031-9007
dc.identifier.urihttps://hdl.handle.net/20.500.14468/24747
dc.journal.issue19
dc.journal.titlePhysical Review Letters
dc.journal.volume114
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.centerFacultades y escuelas::Facultad de Ciencias
dc.relation.departmentFΓ­sica Interdisciplinar
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.es
dc.titleA precision measurement of the 𝑝⁑(𝑒,𝑒′⁒𝑝)β’πœ‹0 reaction at thresholden
dc.typeartΓ­culoes
dc.typejournal articleen
dspace.entity.typePublication
relation.isAuthorOfPublication66882618-d034-433a-bfcf-670b00bc6adf
relation.isAuthorOfPublication.latestForDiscovery66882618-d034-433a-bfcf-670b00bc6adf
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