An absolute polarimeter for high energy protons
High Energy Physics - Phenomenology
2008-11-26 v1
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.
Keywords
Cite
@article{arxiv.hep-ph/0107013,
title = {An absolute polarimeter for high energy protons},
author = {N. H. Buttimore and E. Leader and T. L. Trueman},
journal= {arXiv preprint arXiv:hep-ph/0107013},
year = {2008}
}