Köln 2025 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Poster
HK 23.43: Poster
Tuesday, March 11, 2025, 17:30–19:00, Foyer Physik
Charged kaon SIDIS with CLAS12 — •Áron Kripkó1, Stefan Diehl1,2, and Kai-Thomas Brinkmann1 — 1Justus Liebig Universität Gießen, 35390 Gießen, Germany — 2University of Connecticut, Storrs, CT 06269, USA
A multidimensional study of the structure function ratios FLUsin(φ)/FUU, FUUcos(φ)/FUU and FUUcos(2φ)/FUU has been performed for charged kaons. It uses the high statistics data recorded with the CLAS12 spectrometer at Jefferson Laboratory. The 10.6 GeV longitudinally polarized electron beam interacted with an unpolarized liquid hydrogen target during the experiment. FLUsin(φ) and FUUcos(φ) are twist-3 objects that encode information about the quark-gluon-correlations in the proton. FUUcos(2φ) is a twist-2 quantity, providing a direct access to the Boer-Mulders function.
The poster presents an analysis of the charged kaon final states eK±X using machine learning improved particle identification, over a large kinematic range with virtualities Q2 ranging from 1 GeV2 to 8 GeV2. The precise multidimensional measurement was performed in a large range of z, xB, pT and Q2 for the first time in the valence quark region. The structure function ratios were extracted by beam spin asymmetry and by direct cross section measurements.
This work is funded by DFG (Project No: 508107918).
Keywords: Nucleon Structure; Deeply Inelastic Scattering; CLAS; Structure Functions