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Sep 24 – 29, 2023
US/Eastern timezone

Longitudinal Spin Transfer to $\Lambda$ Hyperons with CLAS12

Sep 26, 2023, 10:15 AM
15m
Meeting Room 1-2 (Durham Convention Center)

Meeting Room 1-2

Durham Convention Center

Talk 3D Structure of the Nucleon: TMDs 3D Structure of the Nucleon: TMDs

Speaker

Matthew McEneaney (Duke University)

Description

Using the self-analyzing decay of the $\Lambda$, the longitudinal spin transfer $D_{LL'}$ to the hyperon from a polarized electron beam scattering off an unpolarized proton target can be determined. For $\Lambda$s produced in the current fragmentation region, this quantity is proportional to the helicity dependent fragmentation function $G_1^\Lambda$ and can provide insight into the spin structure of the $\Lambda$. Currently, limited experimental data on $D_{LL'}$ cannot discriminate between different models of $\Lambda$ spin structure. This contribution reports on the measurement of the longitudinal spin transfer using data taken by the CLAS12 spectrometer at Jefferson Lab with a 10.6 GeV polarized electron beam. We also report on status of the ongoing analysis of spin transfer and back-to-back hadron correlations with target fragmentation $\Lambda$s.

Primary author

Matthew McEneaney (Duke University)

Presentation materials