Modeling Quasi-elastic Form Factors for Electron and Neutrino Scattering
نویسندگان
چکیده
We calculate the total and di erential quasielastic cross sections for neutrino and antineutrino scattering on nucleons using up to date ts to the nucleon elastic electromagnetic form factors GpE , G n E , G p M , G n M , and weak and pseudoscalar form factors. We nd that using the updated non-zero value of GnE has a signi cant e ect on both the total and di erential neutrino and antineutrino quasielastic cross sections. Previous extractions of the weak axial form factor from neutrino scattering data are sensitive to the assumptions that were used for the vector form factors. We perform a re-analysis of previous neutrino data using updated form factors and obtain updated value of the axial vector mass. (Presented by Howard Budd at NuInt02, Dec. 2002, Irvine, CA, USA [1])
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