Pion electroproduction in a nonrelativistic theory
نویسندگان
چکیده
منابع مشابه
Pion photoproduction in a nonrelativistic theory
The pion and nucleon mass differences generate a very pronounced cusp in the photoproduction reaction of a single pion on the nucleon. A nonrelativistic effective field theory to describe this reaction is constructed. The approach is rigorous in the sense that it is an effective field theory with a consistent power counting scheme. Expressions for the Sand P -wave multipole amplitudes for all f...
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Threshold pion photoand electroproduction off nucleons allow us, by the use of a well-understood probe, to test our understanding of the strong interaction at low energies, i.e. in the non–perturbative regime. Over the last few years, renewed interest in these reactions has emerged. This was first triggered through precise new data on neutral pion photoproduction [1] which lead to a controversy...
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We have extended a model for the γN → ππN reaction to virtual photons and selected the diagrams which have a ∆ in the final state. The agreement found with the γ v p → ∆ 0 π + and γ v p → ∆ ++ π − reactions is good. The sensitivity of the results to N ∆ transition form factors is also studied. The present reaction, selecting a particular final state, is an extra test for models of the γ v N → π...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2010
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2010.07.029