Nucleon resonance effects inpp→ppπ0near threshold
نویسندگان
چکیده
منابع مشابه
Nucleon Resonance Physics
Recent results of meson photo-production at the existing electron machines with polarized real photon beams and the measurement of polarization observables of the final state baryons have provided high precision data that led to the discovery of new excited nucleon and ∆ states using multi-channel partial wave analyses procedures. The internal structure of several prominent excited states has b...
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We study the mechanism of the associated Λ-kaon and Σ-kaon production in nucleon-nucleon collisions over an extended range of near threshold beam energies within an effective Lagrangian model, to understand the new data on pp → pΛK and pp → pΣK reactions published recently by the COSY-11 collaboration. In this theory, the hyperon production proceeds via the excitation of N∗(1650), N∗(1710), and...
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The last decade has witnessed great experimental progress that has led to measurements of near threshold cross sections—polarized as well as unpolarized—of high accuracy for various inelastic nucleon–nucleon collision channels. These data, naturally, pose challenges to theorists to develop methods by which they can be understood and explained in commensurate detail. In this work we review the s...
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The PROMICE/WASA collaboration has studied and meson production in nucleon-nucleon collisions near threshold using the CELSIUS ring at the The Svedberg Laboratory, Uppsala. Some of the reaction channels are measured for the rst time in any detail. The results are presented together with an outlook.
متن کامل66 v 1 2 4 Fe b 19 99 Nucleon Resonance Effects in pp → ppπ 0 near Threshold
The role of the low lying nucleon resonances beyond the ∆(1232) in the reaction pp → ppπ 0 near threshold is shown to be numerically significant by a calculation, which takes into account the pion re-scattering contribution described by chiral perturbation theory and the short-range mechanisms that are implied by the nucleon-nucleon interaction model. The intermediate N (1440) (P 11) resonance ...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 1999
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.60.045201