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Photoproduction of thef1(1285)mesonстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Dickson R., Schumacher R.A., Adhikari K.P., Akbar Z., Amaryan M.J., Anefalos Pereira S., Badui R.A., Ball J., Battaglieri M., Batourine V., Mokeev V.I., Isupov E.L., Ishkhanov B.S., Fedotov G.V., Skorodumina Iu A.
- Журнал: Physical Review C
- Том: 93
- Номер: 6
- Год издания: 2016
- Издательство: American Physical Society
- Местоположение издательства: College Park, MD
- DOI: 10.1103/physrevc.93.065202
- Аннотация: The f1(1285) meson with mass 1281.0±0.8 MeV/c2 and width 18.4±1.4 MeV (full width at half maximum) was measured for the first time in photoproduction from a proton target using CLAS at Jefferson Lab. Differential cross sections were obtained via the ηπ+π−,K+K⎯⎯⎯0π−, and K−K0π+ decay channels from threshold up to a center-of-mass energy of 2.8 GeV. The mass, width, and an amplitude analysis of the ηπ+π− final-state Dalitz distribution are consistent with the axial-vector JP=1+ f1(1285) identity, rather than the pseudoscalar 0− η(1295). The production mechanism is more consistent with s-channel decay of a high-mass N∗ state and not with t-channel meson exchange. Decays to ηππ go dominantly via the intermediate a±0(980)π∓ states, with the branching ratio Γ[a0π(noK⎯⎯⎯K)]/Γ[ηππ(all)]=0.74±0.09. The branching ratios Γ(KK⎯⎯⎯π)/Γ(ηππ)=0.216±0.033 and Γ(γρ0)/Γ(ηππ)=0.047±0.018 were also obtained. The first is in agreement with previous data for the f1(1285), while the latter is lower than the world average.
- Добавил в систему: Исупов Евгений Леонидович