Speaker
Description
Understanding the internal structure of nucleons remains a fundamental challenge in hadronic physics. Generalized Parton Distributions (GPDs) provide a universal framework to describe this structure by correlating the partons' longitudinal momentum with their transverse spatial distribution. This 3D imaging gives access to partonic angular momentum and helps address the long-standing proton spin puzzle by constraining orbital contributions to the total nucleon spin.
Deeply Virtual Compton Scattering (DVCS) is one of the cleanest channels to access GPDs. This talk will detail the extraction of the neutron DVCS cross sections from the CLAS12 experiment at Jefferson Lab, with the electron beam about 10.4 GeV scattering off a liquid deuterium target. Preliminary cross-section results will be presented, providing valuable inputs for GPD models.
Furthermore, the exclusive production of $K^+\Lambda$ pairs offers sensitivity to specific GPD components that are suppressed in DVCS. This talk will also discuss an ongoing study of $\Lambda$ hyperon transverse polarization with a longitudinally polarized NH3 target at CLAS12, which probes chiral-odd GPDs and provides a complementary perspective on the nucleon's 3D structure.
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