The 24th International Spin Symposium

Session

Joint GPD - Helicity session

21 Oct 2021, 08:40

Matsue, Shimane Prefecture, Japan

Conveners

Joint GPD - Helicity session: Chair: Marie Boer

• Maria Zurek (Argonne National Laboratory)
• Itaru Nakagawa (RIKEN)
• Marie Boer
• Wen-Chen Chang (Institute of Physics, Academia Sinica)

77. transverse spin sum rules

Prof. XIANGDONG JI (University of Maryland)

21/10/2021, 08:40

Nucleon Helicity Structure

Parallel Session keynote talk (by invitation only)

There are two transverse spin sum rules for the proton: One involves twist-2 GPDs, which has a partonic interpretation, and the other involves twist-3 distributions including the well-know spin structure function g_2. I will explain the origin and physics of these two spin sum rules.

141. Novel CFFs Extraction in Unpolarized DVCS

Liliet Calero Diaz (UVA)

21/10/2021, 09:10

Form factors and GPDs

Parallel Session Presentation

Over the last 20 years there has been intense experimental activity dedicated to the measurement of observables to help build a 3D description of the nucleon. Generalized parton distributions (GPDs) describe complementary aspects of the structure of hadrons, providing qualitative and quantitative information about the partonic structure and dynamics such as orbital angular momentum. The...

61. Longitudinal Spin Transfer to Lambda Hyperons in CLAS12

Matthew McEneaney (Duke University)

21/10/2021, 09:30

Nucleon Helicity Structure

Parallel Session Presentation

Using the self analyzing decay of the $\Lambda^0$, the longitudinal spin transfer $D_{LL}$ from a polarized electron beam scattering an unpolarized proton target to the hyperon can be measured. 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...