Bochum 2018 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 37: Hadron Structure and Spectroscopy VI
HK 37.4: Talk
Wednesday, February 28, 2018, 17:30–17:45, HZO 50
Search for polarization in the antiproton production process — •Dominika Alfs — Institut für Kernphysik, Forschungszentrum Jülich, Germany — Institute of Physics, Jagiellonian University, Kraków, Poland
A wide range of fundamental effects in the hadronic sector can be investigated only by means of controlling the spin degrees of freedom. However, for the time being, there is no convenient method for the production of a well-defined polarized antiproton beam with high intensity [1].
An alternative approach towards this problem would be possible if antiprotons had a non zero polarization degree when produced but until now there were no experimental studies in this direction. Such an experiment has been performed at the CERN/PS complex in order to test whether the production process under conditions typical for the antiproton beam preparation can be itself a source of polarization [2].
The polarization is measured by the asymmetry of elastic antiproton scattering on a liquid hydrogen target in the Coulomb-nuclear interference region with the expected analyzing power Ay equal to about 4.5% [2].
The experimental setup will be presented and the status of the ongoing analysis will be shown. Furthermore, plans for the forthcoming measurement with upgraded detector components will be explained.
[1] E. Steffens, AIP Conf. Proc. 1149, 80-89 (2009)
[2] D. Grzonka, et. al., Acta Phys. Polon. B 46 191 (2015)