20.500.12556/RUL-166879 Nuclear density dependence of polarization transfer in quasi-elastic $A(\vec{e}, e'\vec{p})$ reactions The ratio of the transverse and longitudinal components of polarization transfer to protons in the quasielastic ($\vec{e}, e'\vec{p}$) reaction, $P'_x/P'_z$, is sensitive to the proton’s electromagnetic form factor ratio, $G_E/G_M$. To explore densitydependent in-medium modifications, a comparison of polarization transfer ratios involving protons from distinct nuclear shells, each with different local nuclear densities, has been proposed. In this study, we present such comparisons between four shells, $1s_{1/2}$,$1p_{3/2}$ in $^{12}$C and $1d_{3/2}$,$2s_{1/2}$ in $^{40}$Ca. In an effort to account for other many-body effects that may differ between shells, we use a state-of-the-art relativistic distorted-wave impulseapproximation (RDWIA) calculation and present the double ratios $(P'_x/P'_z)_{\mathrm{Data}}/(P'_x/P'_z)_{\mathrm{RDWIA}}$ as well as the superratios $[(P'_x/P'_z)_\mathrm{A}/(P'_x/P'_z)_\mathrm{B}]_{\mathrm{Data}}/[(P'_x/P'_z)_\mathrm{A}/(P'_x/P'_z)_\mathrm{B}]_{\mathrm{RDWIA}}$, for chosen shells A and B, as a function of effective local nuclear densities. We find that double ratios for individual shells show a dependence on the probed effective nuclear densities. Studying the super-ratios, we observed a systematic variation between pairs of higher- and lower-density shells. nuclear physics nuclear reactions jedrska fizika jedrske reakcije true false true Angleški jezik Slovenski jezik Članek v reviji 2025-01-29 10:10:26 2025-01-29 10:10:27 2025-04-04 13:40:50 0000-00-00 00:00:00 2024 0 0 Str. L061302-1-L061302-6 iss. 6 Vol. 110 2024 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.1 2469-9985 10.1103/PhysRevC.110.L061302 219253251 2311.01935v3.pdf 2311.01935v3.pdf 1 C28F1AB52D2BD14A40D571A97DECCE50 7a2feb3f3c9ab7faf7fe09354252e18c2e978df5a1e6664dd1f61b4ff5be28ca 980ef540-de23-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=198858 https://journals.aps.org/prc/abstract/10.1103/PhysRevC.110.L061302 0 b6208c91-de22-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=198857 Fakulteta za matematiko in fiziko 0 0 0