Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1997-12-10
Phys.Rev.C58:75-90,1998
Physics
Nuclear Physics
Nuclear Theory
38 pages in LaTeX2e-RevTeX + 8 postscript figures
Scientific paper
10.1103/PhysRevC.58.75
Previous approaches to the photo- and electro-production of strangeness off the proton, based upon effective hadronic Lagrangians, are extended here to incorporate the so called off-shell effects inherent to the fermions with spin >= 3/2. A formalism for intermediate-state, spin 3/2, nucleonic and hyperonic resonances is presented and applied to the processes $\gamma + p ---> K^{+} + \Lambda$, for $E_{\gamma}^{lab}$ <= 2.5 GeV, $e + p ---> e' + K^+ + \Lambda$, as well as the branching ratio for the crossed channel reaction $K^- + p ---> \gamma + \Lambda$, with stopped kaons. The sensitivity, from moderate to significant, of various observables to such effects are discussed.
Fayard C.
Lamot G.-H.
Mizutani Takashi
Saghai Bijan
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