Single-spin azimuthal asymmetries were extracted at HERMES in inclusive electroproduction of charged hadrons from transversely polarized protons. The asymmetries were studied as a function of the transverse hadron momentum PT relative to the beam direction, and the Feynman variable xF . The asymmetry amplitudes are positive for + and K +, slightly negative for − and consistent with zero for K −. Especially large asymmetries are observed for two small subsamples of events, where also the scattered electron was recorded, revealing important contributions from TMDs.

Recent results on TMDs from the HERMES experiment

PAPPALARDO, Luciano Libero
2014

Abstract

Single-spin azimuthal asymmetries were extracted at HERMES in inclusive electroproduction of charged hadrons from transversely polarized protons. The asymmetries were studied as a function of the transverse hadron momentum PT relative to the beam direction, and the Feynman variable xF . The asymmetry amplitudes are positive for + and K +, slightly negative for − and consistent with zero for K −. Especially large asymmetries are observed for two small subsamples of events, where also the scattered electron was recorded, revealing important contributions from TMDs.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2019413
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