Speaker
Description
The study of the fundamental characteristics of the hadron formation process using particle identification in Semi-Inclusive Deep Inelastic Scattering is a new frontier in hadron physics. Initially pioneered by the HERMES experiment, this subfield has seen expansion to a broader range of momenta and identified particle types via the CLAS EG2 dataset with 5 GeV electron beam and the new CLAS Run Group E (RGE) dataset with 10.5 GeV highly polarized electron beam. With an order of magnitude more luminosity than EG2, and six nuclear targets ranging in size from deuterium to lead, these data allow an assessment of the variable dependences of the observables needed to perform phenomenological analyses that reveal the dynamics involved in the hadronization process, with a 4-momentum reach of up to 9 GeV^2. New touchpoints in this field relative to the HERMES era include extension of baryon production to the lambda hyperon, and proton production with up to 3-fold differential distributions, which reveal tantalizing new behavior quite unlike meson production distributions, potentially suggesting the influence of diquark degrees of freedom. Extensions of these studies to the charm sector are also under study with RGE, extending the hadron mass and flavor range accessible from these datasets.