Polarization observables in the longitudinal basis for pseudo-scalar meson photoproduction using a density matrix approach

Dey, B., McCracken, M.E., Ireland, D.G. and Meyer, C.A. (2011) Polarization observables in the longitudinal basis for pseudo-scalar meson photoproduction using a density matrix approach. Physical Review C, 83(5), 055208. (doi: 10.1103/PhysRevC.83.055208)

Abstract

The complete expression for the intensity in pseudo-scalar meson photoproduction with a polarized beam, target, and recoil baryon is derived using a density matrix approach that offers great economy of notation. A Cartesian basis with spins for all particles quantized along a single direction, the longitudinal beam direction, is used for consistency and clarity in interpretation. A single spin-quantization axis for all particles enables the amplitudes to be written in a manifestly covariant fashion with simple relations to those of the well-known Chew-Goldberger-Low-Nambu formalism. Possible sign discrepancies between theoretical amplitude-level expressions and experimentally measurable intensity profiles are dealt with carefully. Our motivation is to provide a coherent framework for coupled-channel partial-wave analysis of several meson photoproduction reactions, incorporating recently published and forthcoming polarization data from Jefferson Lab.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ireland, Professor David
• Authors: Dey, B., McCracken, M.E., Ireland, D.G., and Meyer, C.A.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Research Group: Nuclear Physics
• Journal Name: Physical Review C
• ISSN: 0556-2813

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