Moments of angular distribution and beam asymmetries in ηπ0 photoproduction at GlueX

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dc.contributor.authorMathieu, Vincent
dc.contributor.authorAlbaladejo, M.
dc.contributor.authorFernández Ramírez, C.
dc.contributor.authorJackura, A.
dc.contributor.authorMikhasenko, M.
dc.contributor.authorPilloni, A.
dc.contributor.authorSzczepaniak, A. P.
dc.date.accessioned2023-06-17T12:44:32Z
dc.date.available2023-06-17T12:44:32Z
dc.date.issued2019-08-17
dc.description.abstractIn the search for exotic mesons, the GlueX Collaboration will soon extract moments of the ηπ0 angular distribution. In the perspective of these results, we generalize the formalism of moment extraction to the case in which the two mesons are produced with a linearly polarized beam and build a model for the reaction γ⃗p → ηπ0p. The model includes resonant S, P, and D waves in ηπ0, produced by natural exchanges. Moments of the ηπ0 angular distribution are computed with and without the P wave, to illustrate the sensitivity to exotic resonances. Although little sensitivity to the P wave is found in moments of even angular momentum, moments of odd angular momentum are proportional to the interference between the P wave and the dominant S and D waves. We also generalize the definition of the beam asymmetry for two mesons photoproduction and show that, when the meson momenta are perpendicular to the reaction plane, the beam asymmetry enhances the sensitivity to the exotic P wave.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)
dc.description.sponsorshipU.S. Department of Energy
dc.description.sponsorshipU.S. National Science Foundation
dc.description.sponsorshipUNAM México
dc.description.sponsorshipCONACYT (Mexico)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/74442
dc.identifier.doi10.1103/PhysRevD.100.054017
dc.identifier.issn2470-0010
dc.identifier.officialurlhttps://doi.org/10.1103/PhysRevD.100.054017
dc.identifier.relatedurlhttps://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.054017
dc.identifier.urihttps://hdl.handle.net/20.500.14352/12877
dc.issue.number5
dc.journal.titlePhysical Review D
dc.language.isoeng
dc.publisherAPS Physics
dc.relation.projectIDFPA2016-77313-P; FPA2016-75654-C2-2-P
dc.relation.projectIDDE-AC05-06OR23177 and No. DE-FG02-87ER40365
dc.relation.projectIDPHY-1415459
dc.relation.projectIDIA101819
dc.relation.projectID251817 and No. A1-S-21389
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/es/
dc.subject.ucmElectromagnetismo
dc.subject.ucmFísica-Modelos matemáticos
dc.subject.unesco2202 Electromagnetismo
dc.titleMoments of angular distribution and beam asymmetries in ηπ0 photoproduction at GlueX
dc.typejournal article
dc.volume.number100
dspace.entity.typePublication
relation.isAuthorOfPublication17de49b7-46a8-4bce-b8df-ee29abc569d8
relation.isAuthorOfPublication.latestForDiscovery17de49b7-46a8-4bce-b8df-ee29abc569d8
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