Consistent model forπNtransition distribution amplitudes and backward pion electroproduction
نویسندگان
چکیده
منابع مشابه
Pion-Nucleon Distribution Amplitudes
In recent years there has been increasing attention to hard exclusive processes involving emission of soft pions in the final state. In the near future new experimental data will emerge and their interpretation requires information about the nucleon wave function. Such processes are attractive as they provide us new insights in the hadron (nucleon) structure. At this point the nucleon distribut...
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The vector and axial pion-photon transition distribution amplitudes are analyzed in the Spectral Quark Model. We proceed by the evaluation of double distributions through the use of a manifestly covariant calculation based on the α representation of propagators. As a result polynomiality is incorporated and calculations become rather simple. Explicit formulas, holding at the low-energy quark-mo...
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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: Physical Review D
سال: 2012
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.85.054021