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First measurement of target and double spin asymmetries for ep -> ep pi(0) in the nucleon resonance region above the Delta(1232)статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Fedotov G., Golovatch E., Ishkhanov B.S., Isupov E.L., Mokeev V., CLAS C.
- Журнал: Physical Review C - Nuclear Physics
- Том: 78
- Номер: 4
- Год издания: 2008
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 045204
- DOI: 10.1103/PhysRevC.78.045204
- Аннотация: The exclusive channel p(e,e(')p)pi(0) was studied in the first and second nucleon resonance regions in the Q(2) range from 0.187 to 0.770 GeV(2) at Jefferson Lab using the CEBAF Large Acceptance Spectrometer. Longitudinal target and beam-target asymmetries were extracted over a large range of center-of-mass angles of the pi(0) and compared to the unitary isobar model MAID, the dynamic model by Sato and Lee, and the dynamic model DMT. A strong sensitivity to individual models was observed, in particular for the target asymmetry and in the higher invariant mass region. This data set, once included in the global fits of the above models, is expected to place strong constraints on the electrocoupling amplitudes A(1/2) and S(1/2) for the Roper resonance N(1400)P(11) and the N(1535)S(11) and N(1520)D(13) states.
- Добавил в систему: Ишханов Борис Саркисович