Extracting F{sub 2}{sup {Lambda}}(q{sup 2})/F{sub 2}{sup {Sigma}{Lambda}}(q{sup 2}) from p(e,e{sup {prime}}K{sup +}){rvec {Lambda}}/{rvec {Sigma}}{sup 0} polarizations?
- Thomas Jefferson National Accelerator Facility, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States)
In kaon electroproduction, p(e,e{sup {prime}}K{sup +}){rvec Y} (Y={Lambda},{Sigma}{sup 0}), hyperon polarization is an observable which arises from interference between resonant (N{sup {asterisk}},{Delta}{sup {asterisk}}) and nonresonant amplitudes involving the hyperon anomalous magnetic form factors F{sub 2}{sup {Lambda}}(q{sup 2}) and F{sub 2}{sup {Sigma}{Lambda}}(q{sup 2}). Within the framework of an effective hadronic field Lagrangian model we investigate the possibility suggested by Williams and Truman that the {Lambda}/{Sigma}{sup 0} polarized cross section ratio may be approximately proportional to the form factor ratio F{sub 2}{sup {Lambda}}/F{sub 2}{sup {Sigma}{Lambda}} and independent of the dominant N{sup {asterisk}} amplitude. We illustrate both the simplified case where the relation between the form factor and polarized cross section ratio is an identity and the sensitivity due to dynamical assumptions about nearby resonances and the g{sub KN{Lambda}} coupling constant. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 450509
- Journal Information:
- Physical Review, C, Vol. 55, Issue 2; Other Information: PBD: Feb 1997
- Country of Publication:
- United States
- Language:
- English
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