A New Approach to the Charged Current Induced Weak One Pion Production
- ,
- G. Nardulli()
- Bari U. and
- INFN, Bari
35 pages
Published in:
- Nucl.Phys.B 160 (1979) 116-150
- Published: 1979
Report number:
- Print-79-0577 (BARI)
Citations per year
Abstract: (Elsevier)
The weak one-pion production mechanism is analyzed in terms of resonant and non-resonant contributions coming from the πN invariant-mass region extended from threshold to 1.6 GeV/ c 2 . Together with the P 33 , contributing to the I = 3 2 amplitude, the first I = 1 2 resonances (S 11 , P 11 , D 13 ) are also added to the background treated in the Born approximation. Form factors are explicitly extracted from PCAC and from existing fits to electroproduction data, so that the “free” parameters are essentially reduced to the axial masses of the resonances. In the calculation of the cross sections the resonance-background interference is explicitly worked out and its important rôle is stressed. The emerging picture is compared with the available data, which are in this way extensively reviewed, at low, intermediate and high energy. Good agreement is found, and in particular the experimentally observed increasing I = 1 2 contribution is justified by the model in terms of an increasing rôle of the 1.4 ⩽ M N π ⩽ 1.6 GeV/ c 2 invariant-mass region.- NEUTRINO NUCLEON: INELASTIC SCATTERING
- INELASTIC SCATTERING: NEUTRINO NUCLEON
- CHARGED CURRENT
- PI: NEUTRINOPRODUCTION
- NEUTRINOPRODUCTION: PI
- ANTINEUTRINO NUCLEON: INELASTIC SCATTERING
- INELASTIC SCATTERING: ANTINEUTRINO NUCLEON
- SCATTERING AMPLITUDE
- APPROXIMATION: BORN
- PCAC model
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