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

Дата
2021
Авторы
Adhikari, S.
Akondi, C. S.
Ali, A.
Amaryan, M.
Berdnikov, V. V.
Romanov, D.
Somov, S.
Williams, M.
Journal Title
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Издатель
Научные группы
Логотип проекта
Научная группа
GlueX Collaboration
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Выпуск журнала
Аннотация
© 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.
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Цитирование
Measurement 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
URI
https://www.doi.org/10.1103/PhysRevC.103.L022201
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85102079447&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000620346400007
 https://openrepository.mephi.ru/handle/123456789/23777
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