Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-09-17
Phys.Lett. B442 (1998) 479-483
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, Latex, 4 figures
Scientific paper
10.1016/S0370-2693(98)01272-6
We examine a suggestion to use ${p-} ^4{He}$ elastic scattering, as an absolute polarimeter for high-energy polarized proton beams, by means of a Coulomb-Nuclear Interference effect for the single-spin asymmetry $A_N(t)$, around the diffractive minimum of the differential cross section $|t|\sim 0.21 GeV^2$. Although this reaction has a fairly simple dynamical structure, our theoretical uncertainties and the present experimental inaccuracy of the differential cross section in this $t$ region, allows one to generate dramatic effects for $A_N(t)$, which will be discussed.
Bourrely Claude
Soffer Jacques
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