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Measurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV

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dc.contributor.authorAdhikari, S.
dc.contributor.authorAkondi, C. S.
dc.contributor.authorAli, A.
dc.contributor.authorAmaryan, M.
dc.contributor.authorBerdnikov, V. V.
dc.contributor.authorRomanov, D.
dc.contributor.authorSomov, S.
dc.contributor.authorWilliams, M.
dc.contributor.authorСомов, Сергей Всеволодович
dc.date.accessioned2024-11-29T12:23:13Z
dc.date.available2024-11-29T12:23:13Z
dc.date.issued2021
dc.description.abstract© 2021 American Physical Society.We report a measurement of the π- photoproduction beam asymmetry for the reaction γp→π-Δ++ using data from the GlueX experiment in the photon beam energy range 8.2-8.8 GeV. The asymmetry ς is measured as a function of four-momentum transfer t to the Δ++ and compared to phenomenological models. We find that ς varies as a function of t: negative at smaller values and positive at higher values of |t|. The reaction can be described theoretically by t-channel particle exchange requiring pseudoscalar, vector, and tensor intermediaries. In particular, this reaction requires charge exchange, allowing us to probe pion exchange and the significance of higher-order corrections to one-pion exchange at low momentum transfer. Constraining production mechanisms of conventional mesons may aid in the search for and study of unconventional mesons. This is the first measurement of the process at this energy.
dc.identifier.citationMeasurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV / Adhikari, S. [et al.] // Physical Review C. - 2021. - 103. - № 2. - 10.1103/PhysRevC.103.L022201
dc.identifier.doi10.1103/PhysRevC.103.L022201
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevC.103.L022201
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85102079447&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000620346400007
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/23777
dc.relation.ispartofPhysical Review C
dc.titleMeasurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue2
oaire.citation.volume103
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