20.500.12556/RUL-175984 Measurement of the helicity-dependent response in quasi-elastic proton knockout from $^{40}$Ca The role of the electron-helicity-dependent cross-section term and the structure function $f'_{01}$ in the quasi-elastic $A(\overrightarrow{e}, e' p)$ process was studied. The $f'_{01}$ was measured for proton knockout from the $1\mathrm{d}_{3/2}$ shell in $^{40}$Ca via the $^{40}$Ca$(\overrightarrow{e}, e' p)^{39} K_{g. s.}$ reaction, leaving the residual nucleus in a well-defined state. It requires a longitudinally polarized electron beam and out-of-plane proton detection. This structure function vanishes in the absence of final-state interactions (FSI) involving the ejected proton. Presented are the dependencies of $f'_{01}$ on the missing momentum (closely related to the initial proton’s Fermi momentum) and the angle between the knocked-out proton and the virtual photon momenta. The role of the spin-orbit interaction in FSI through the $\overrightarrow{L}\cdot \overrightarrow{S}$ term in a nuclear optical potential is discussed. nuclear physics nuclear structure electron scattering final-state interactions nuclear optical potential polarized electron scattering beam helicity asymmetry jedrska fizika true false true Angleški jezik Slovenski jezik Članek v reviji 2025-11-17 11:27:26 2025-11-17 11:27:27 2025-12-16 04:06:05 0000-00-00 00:00:00 2025 0 0 7 str. art. no. 139977 Vol. 871 Dec. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.1 1873-2445 10.1016/j.physletb.2025.139977 257424131 1-s2.0-S037026932500735X-main.pdf 1-s2.0-S037026932500735X-main.pdf 1 AA2582E9D5B99E547A84FFFC8CB7E47B b77b098bf28903aa05c97f614955845b89ceb23479b1821be253667e0f9822ba 9d95b269-c3a5-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=221993 https://www.sciencedirect.com/science/article/pii/S037026932500735X 0 a8ff2c12-c3a5-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=221994 Fakulteta za matematiko in fiziko 0 0 0