OFF-SHELL EFFECTS IN THE ELECTROMAGNETIC PRODUCTION OF STRANGENESS

Citation
T. Mizutani et al., OFF-SHELL EFFECTS IN THE ELECTROMAGNETIC PRODUCTION OF STRANGENESS, Physical review. C. Nuclear physics, 58(1), 1998, pp. 75-90
Citations number
57
Categorie Soggetti
Physics, Nuclear
ISSN journal
05562813
Volume
58
Issue
1
Year of publication
1998
Pages
75 - 90
Database
ISI
SICI code
0556-2813(1998)58:1<75:OEITEP>2.0.ZU;2-6
Abstract
Previous approaches to the photoproduction and electroproduction of st rangeness off the proton, based upon effective hadronic Lagrangians, a re extended here to incorporate the so-called off-shell effects inhere nt to the fermions with spin greater than or equal to 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)less than or equal to 2.5 GeV, ep-->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 signific ant, of various observables to such effects are discussed.