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Experimental Study of the P11(1440) and D13(1520) resonances from the CLAS data on ep→e′π+π−p′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: Mokeev V.I., Ishkhanov B.S., Fedotov G.V., Isupov E.L., Golovatch E.N., CLAS Collaboration
- Журнал: Physical Review C - Nuclear Physics
- Том: 86
- Номер: 3
- Год издания: 2012
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 035203
- DOI: 10.1103/PhysRevC.86.035203
- Аннотация: The transition helicity amplitudes from the proton ground state to the P11(1440) and D13(1520) excited states (γvpN∗ electrocouplings) were determined from the analysis of nine independent one-fold differential π+π−p electroproduction cross sections off a proton target, taken with CLAS at photon virtualities 0.25\enskip {\rm GeV2} < Q2 < 0.60 \enskip {\rm GeV2}. The phenomenological reaction model was employed for separation of the resonant and non-resonant contributions to the final state. The P11(1440) and D13(1520) electrocouplings were obtained from the resonant amplitudes parametrized within the framework of a unitarized Breit-Wigner ansatz. They are consistent with results obtained in the previous CLAS analyses of the π+n and π0p channels. The successful description of a large body of data in dominant meson-electroproduction channels off protons with the same γvpN∗ electrocouplings offers clear evidence for the reliable extraction of these fundamental quantities from meson-electroproduction data. This analysis also led to the determination of the long-awaited hadronic branching ratios for the D13(1520) decay into Δπ (24%-32%) and Nρ (8%-17%).
- Добавил в систему: Мокеев Виктор Иванович