$\eta N$ Scattering Parameters and Possible $\eta 'd$ Bound State from $\eta $ Photoproduction on the Deuteron
نویسندگان
چکیده
منابع مشابه
Eta and Eta’ Physics
This talk describes the reasons why η and η decays are an interesting topic of study for both theory and experiment. The main part discusses the results of the recent calculation of η → 3π at two-loop order in ChPT. Some puzzling aspects of the results compared to earlier dispersive calculations are highlighted. I also like to remind the reader of the use of η and η decays for studying the anom...
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متن کاملThe ηNN Coupling in Eta Photoproduction
Low-energy eta photoproduction on the nucleon is studied in an effective Lagrangian approach that contains Born terms, vector meson and nucleon resonance contributions. The resonance sector includes the S11(1535), P11(1440) and D13(1520) states whose couplings are fixed by independent electromagnetic and hadronic data. The available (γ, η) data are employed to discuss the difference between pse...
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Coherent eta photoproduction on the deuteron is studied in the S 11 resonance region neglecting eta rescattering and two-body processes. For the elementary reaction on the nucleon, we have considered the dominant S 11 (1535) resonance and as background the nucleon pole terms as well as and ! meson exchange. We have studied the innuence of diierent choices for the neutron resonance amplitude, di...
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ژورنال
عنوان ژورنال: Acta Physica Polonica B
سال: 2020
ISSN: 0587-4254,1509-5770
DOI: 10.5506/aphyspolb.51.27