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arXiv · hep-ph/0107013

An absolute polarimeter for high energy protons

N. H. Buttimore·E. Leader·T. L. Trueman
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Abstract

A study of the spin asymmetries for polarized elastic proton proton collisions in the electromagnetic hadronic interference (CNI) region of momentum transfer provides a method of self calibration of proton polarization. The method can be extended to non-identical spin half scattering so that, in principle, the polarization of a proton may be obtained through an analysis of its elastic collision with a different polarized particle, helium 3 for instance. Sufficiently large CNI spin asymmetries provide enough information to facilitate the evaluation of nearly all the helicity amplitudes at small t as well as the polarization of both initial spin half fermions. Thus it can serve equally well as a polarimeter for helium 3.

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N. H. Buttimore, E. Leader, T. L. Trueman. 2001-07-02. An absolute polarimeter for high energy protons. https://doi.org/10.1103/physrevd.64.094021

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