9-14 September 2018
University of Ferrara
Europe/Rome timezone

Proton and 3He polarimetry with new forward pp helicity flip amplitudes

12 Sep 2018, 15:10
A9 (Polo degli Adelardi - Via Adelardi, 33)


Polo degli Adelardi - Via Adelardi, 33

Via Adelardi, 33
Parallel Sessions Acceleration, Storage and Polarimetry of Polarized Beams Acceleration, Storage and Polarimetry of Polarized Beams


Dr Nigel Buttimore (Trinity College Dublin)


Seeking the level of polarization of spin-polarized hadrons that have been accelerated to high energies is a continuing challenge. A theoretical study of electromagnetic hadronic interference indicates that scattering of polarized protons and polarized helium-3 ions at small angles on a suitable target can provide an effective polarimeter. A more complete understanding of the asymmetry of the collisions requires one to assess the hadronic spin dependent amplitudes. Recent proton forward scattering data taken at two distinct energies using a polarized hydrogen jet as target have revealed that single and double helicity flip hadronic amplitudes, while small, are clearly non-zero. An analysis of the spin dependent amplitudes at the two incident energies in terms of exchanges with different spin, charge conjugation and parity properties enables an interpolation of the analyzing powers over a range of energies with implications for polarimetry.

Primary author

Dr Nigel Buttimore (Trinity College Dublin)

Presentation Materials