Gießen 2024 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 25: Hadron Structure and Spectroscopy IV
HK 25.4: Talk
Tuesday, March 12, 2024, 18:30–18:45, HBR 14: HS 1
Accessing transverse momentum dependent distribution functions with semi-inclusive deep inelastic single pion production — •Stefan Diehl for the CLAS collaboration — Justus Liebig Universität Gießen and University of Connecticut
Semi-inclusive deep inelastic scattering is a well-established tool to study TMDs and fragmentation functions. With the CLAS12 detector at Jefferson Laboratory (JLab), precise, multidimensional measurements of cross sections and asymmetry observables become possible in the valence quark regime for the first time. The structure-function ratio FLUsinφ/FUU was studied based on beam single-spin asymmetries from pion SIDIS. The talk will present a comprehensive multidimensional study for all three pions over a large range of Q2, xB, z and PT, discuss the connection of the observable to TMDs and the impact of the new data on our understanding of the involved TMDs based on a comparison to TMD based reaction models. A special focus will be given to the impact of exclusive vector meson production on the SIDIS observables.
*The work is supported by Deutsche Forschungsgemeinschaft (Project No. 508107918).
Keywords: electron scattering; 3D nucleon structure; TMDs; SIDIS