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Measurement of target and double-spin asymmetries for the e⃗p⃗→eπ+(n) reaction in the nucleon resonance region at low Q2статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 30 декабря 2016 г.
- Авторы: Drozdov V.A., Fedotov G., Golovatch E., Ishkhanov B.S., Isupov E.L., Mokeev V.I., CLAS Collaboration
- Журнал: Physical Review C
- Том: 94
- Номер: 4
- Год издания: 2016
- Издательство: American Physical Society
- Местоположение издательства: College Park, MD
- Первая страница: 045206-1
- Последняя страница: 045206-19
- DOI: 10.1103/physrevc.94.045206
- Аннотация: We report measurements of target- and double-spin asymmetries for the exclusive channel e⃗ p⃗ →eπ+(n) in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extracted from data obtained using a longitudinally polarized NH3 target and a longitudinally polarized electron beam with energies 1.1, 1.3, 2.0, 2.3, and 3.0 GeV. The new results are consistent with previous CLAS publications but are extended to a low Q2 range from 0.0065 to 0.35(GeV/c)2. The Q2 access was made possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low as 6∘. These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis prediction from SAID, and the dynamic model DMT. In many kinematic regions our results, in particular results on the target asymmetry, help to constrain the polarization-dependent components of these models.
- Добавил в систему: Дроздов Вадим Александрович