Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-10-05
Z.Phys. A347 (1993) 109-116
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, WU-B 93-07, latex, uuencoded postscript files of 7 figures appended at the end of the latex file
Scientific paper
10.1007/BF01284677
We present an alternative parameterization of the quark-diquark model of baryons which particularly takes care of the most recent proton electric form-factor data from the E136 experiment at SLAC. In addition to electromagnetic form factors of the nucleon, for which good agreement with data is achieved, we discuss the weak axial vector form factor of the nucleon as well as electromagnetic form factors of $\Lambda$ and $\Sigma$ hyperons. Technical advance in calculating the pertinent analytic expressions within perturbative quantum chromodynamics is gained by formulating the wave function of the quark-diquark system in a covariant way. Finally, we also comment on the influence of Sudakov corrections within the scope of the diquark model.
Jakob Rainer
Kroll Peter
Schuermann M.
Schweiger Wolfgang
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