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arXiv · 0802.0985

Polarization in Hyperon Photo- and Electro- Production

Reinhard Schumacher
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Abstract

Multiple polarization observables must be measured to access the amplitude structure of pseudoscalar meson photoproduction off the proton. The hyperon-producing reactions are especially attractive to study, since the weak decays allow straightforward measurement of the induced and recoil polarization observables. In this paper we emphasize $γ+ p \to K^+ + Λ$, discussing recent measurements of $C_x$, $C_z$, and $P$ for this reaction. An empirical constraint on the helicity amplitudes is obtained. A simplified model involving spin-flip and spin non-flip amplitudes is presented. Finally, a semi-classical model of how the polarization may arise is presented.

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Reinhard Schumacher. 2008-02-07. Polarization in Hyperon Photo- and Electro- Production. https://doi.org/10.1140/epja/i2007-10558-3

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