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Volume 297 - XXV International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2017) - WG6 Spin and 3D Structure
Ratios of helicity amplitudes for hard exclusive _0 electroproduction on transversely polarized protons
C. Van Hulse
Full text: pdf
Pre-published on: 2017 December 31
Published on: 2018 January 16
The HERMES experiment collected a wealth of deep-inelastic scattering data using the 27.6 GeV polarized lepton beam at HERA and various pure gas targets, both unpolarized and polarized. This allowed for a series of diverse measurements. Among them are measurements of hard exclusive meson production, which provide information on generalized parton distributions (GPDs), in a complementary way to, e.g., deeply virtual Compton scattering. Access to these GPDs is possible through the measurement of helicity-amplitude ratios. Helicity-amplitude ratios from exclusive ρ0 production on transversely polarized hydrogen are presented and discussed as well as compared to the theoretical ‘GK’ model.
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