Off-shell effects in the electromagnetic production of strangeness - INSPIRE

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Off-shell effects in the electromagnetic production of strangeness

Dec, 1997

38 pages

Published in:

Phys.Rev.C 58 (1998) 75-90

e-Print:

nucl-th/9712037 [nucl-th]

DOI:

10.1103/PhysRevC.58.75

Report number:

DAPNIA-SPHN-97-65,
LYCEN-9753

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Abstract:

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.

Note:

38 pages in LaTeX2e-RevTeX + 8 postscript figures Report-no: DAPNIA/SPhN-97-65, LYCEN 9753

photon p: exclusive reaction
electron p: exclusive reaction
photon: polarized beam
strange particle: electroproduction
strange particle: photoproduction
K- p: exclusive reaction
at rest
photon: emission
branching ratio
effective Lagrangian

References(45)

Figures(0)

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