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Determination of the Pole Position of the Lightest Hybrid Meson Candidate

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dc.contributor.authorRodas, A.
dc.contributor.authorAlbadalejo, M.
dc.contributor.authorJackura, A.
dc.contributor.authorFernΓ‘ndez RamΓ­rez, CΓ©sar
dc.contributor.authorMathieu, V.
dc.contributor.authorMikhasenko, M.
dc.contributor.authorNys, J.
dc.contributor.authorPauk, V.
dc.contributor.authorKetzer, B.
dc.contributor.authorSzczepaniak, A.P.
dc.date.accessioned2024-12-03T12:42:04Z
dc.date.available2024-12-03T12:42:04Z
dc.date.issued2019-01-29
dc.descriptionThe registered version of this article, first published in β€œPhysical Review Letters, 122(4)2002", is available online at the publisher's website: American Physical Society, https://doi.org/10.1103/PhysRevLett.122.042002
dc.descriptionLa versiΓ³n registrada de este artΓ­culo, publicado por primera vez en β€œPhysical Review Letters, 122(4)2002", estΓ‘ disponible en lΓ­nea en el sitio web del editor: American Physical Society, https://doi.org/10.1103/PhysRevLett.122.042002
dc.description.abstractMapping states with explicit gluonic degrees of freedom in the light sector is a challenge, and has led to controversies in the past. In particular, the experiments have reported two different hybrid candidates with spin-exotic signature, πœ‹1⁑(1400) and πœ‹1⁑(1600), which couple separately to πœ‚β’πœ‹ and πœ‚β€²β’πœ‹. This picture is not compatible with recent Lattice QCD estimates for hybrid states, nor with most phenomenological models. We consider the recent partial wave analysis of the πœ‚(β€²)β’πœ‹ system by the COMPASS Collaboration. We fit the extracted intensities and phases with a coupled-channel amplitude that enforces the unitarity and analyticity of the 𝑆 matrix. We provide a robust extraction of a single exotic πœ‹1 resonant pole, with mass and width 1564 Β±24 Β±86 and 492 Β±54 Β±102  MeV, which couples to both πœ‚(β€²)β’πœ‹ channels. We find no evidence for a second exotic state. We also provide the resonance parameters of the π‘Ž2⁑(1320) and π‘Žβ€² 2⁑(1700).en
dc.description.versionversiΓ³n publicada
dc.identifier.citationRodas, Pilloni, Albaladejo, FernΓ‘ndez-RamΓ­rez, Jackura, Mathieu, Mikhasenko, Nys, Pauk, Ketzer, & Szczepaniak. (2019). Determination of the Pole Position of the Lightest Hybrid Meson Candidate. Physical Review Letters, 122(4)2002. https://doi.org/10.1103/PHYSREVLETT.122.042002
dc.identifier.doihttps://doi.org/10.1103/PhysRevLett.122.042002
dc.identifier.issn1079-7114, 0031-9007
dc.identifier.urihttps://hdl.handle.net/20.500.14468/24670
dc.journal.issue4
dc.journal.titlePhysical Review Letters
dc.journal.volume122
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.titleDetermination of the Pole Position of the Lightest Hybrid Meson Candidateen
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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