Speaker
Description
In high-energy physics, traditional spin-orbit (L-S) decomposition effectively describes 3-point interaction structures and fully characterizes 3-point kinematics. However, its formulation is entirely dependent on the Center-of-Mass Frame (CMF) angular variables $(\theta,\varphi)$, necessitating Lorentz boosts back to the CMF for decomposition in practical calculations, which adds complexity. To resolve this, we use covariant spinor variables to construct a formally covariant spin-orbit coupling. This formulation enables L-S decomposition of amplitudes in any arbitrary reference frame, eliminating the requirement to return to the CMF and streamlining spin-dependent analyses. Furthermore, leveraging this tool, we can establish the general structure of Form Factors, construct covariant spin-operators, and develop covariant tomography for high-energy interaction analyses.
