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First Measurement of the Polarization Observable E in the p⃗ (γ⃗ ,π+)n Reaction up to 2.25 GeVстатья
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: 26 декабря 2015 г.
- Авторы: Fedotov G., Golovatch E., Ishkhanov B.S., Isupov E.L., CLAS Collaboration
- Журнал: Physics Letters B
- Том: 750
- Год издания: 2015
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 53
- Последняя страница: 58
- DOI: 10.1016/j.physletb.2015.08.053
- Аннотация: First results from the longitudinally polarized frozen-spin target (FROST) program are reported. The double-polarization observable E , for the reaction View the MathML source, has been measured using a circularly polarized tagged-photon beam, with energies from 0.35 to 2.37 GeV. The final-state pions were detected with the CEBAF Large Acceptance Spectrometer in Hall B at the Thomas Jefferson National Accelerator Facility. These polarization data agree fairly well with previous partial-wave analyses at low photon energies. Over much of the covered energy range, however, significant deviations are observed, particularly in the high-energy region where high-L multipoles contribute. The data have been included in new multipole analyses resulting in updated nucleon resonance parameters. We report updated fits from the Bonn–Gatchina, Jülich–Bonn, and SAID groups.
- Добавил в систему: Исупов Евгений Леонидович