Figure 1

Geometry of the process. We call ${\varphi }_s$ the angle between the directions of the spin and of the momentum of the photon. The angle θ defines the proton emission direction with respect to the photon momentum.Reuse & Permissions

Figure 2

Feynmann diagrams of the MEC terms considered in our calculations. (a) and (b) represent the seagull and pionic currents, respectively, whereas (c) and (d) show the Δ currents.Reuse & Permissions

Figure 3

Asymmetries of the $(\overrightarrow{\gamma },p)$ reaction, Eq. (5), calculated by using OB currents only. The target nuclei and the hole states of the remaining nuclei are indicated in each panel. The photon energy has been fixed at $\omega =80$ MeV. The lines show the results obtained with various optical potentials. Specifically, the solid lines have been obtained with the Sc potential [37], the dotted lines with the CK potential [38], the dashed lines with the AJ potential [39], and the dashed-dotted lines with the real WS potential [31, 30].Reuse & Permissions

Figure 4

The ${\mathrm{W}}_T$ (upper panels) and ${\mathrm{W}}_{\mathrm{TT}}$ (lower panels) response functions contributing to the asymmetries for the emission from the $1p_{3/2}$ (left panels) and $1p_{1/2}$ (right panels) hole states. The lines are as described in the legend to Fig. 3. In the insert the behavior of the responses for $\theta ⩾{60}^{°}$ has been emphasized.Reuse & Permissions

Figure 5

Angular distribution of the asymmetries for excitation energies of 80 and 150 MeV. These results have been obtained by using OB currents only. The full lines show the results obtained without the SRC and they are the same as described in the legend to Fig. 3. Dashed and dotted lines have been obtained with the correlations shown in (e), taken from Ref. [31] (dashed lines) and from Ref. [41] (dotted lines).Reuse & Permissions

Figure 6

Asymmetry angular distributions. The results obtained with the OB currrents only are represented by the thin solid lines. The dashed-dotted lines were obtained by including the seagull and pionic currents. The other lines show the results obtained by including also the Δ currents that were calculated with the coupling constants given in Table : AMA (thick full lines), GIU (dashed lines), RYC (dotted lines).Reuse & Permissions

Figure 7

Angular distributions of the $W_T$ (upper panels) and $W_{\mathrm{TT}}$ (lower panels) responses. The meaning of the lines is the same as in Fig. 6.Reuse & Permissions

Figure 8

The same as in Fig. 6 for an excitation energy of 150 MeV.Reuse & Permissions

Figure 9

The same as in Fig. 7 for an excitation energy of 150 MeV.Reuse & Permissions

Figure 10

Asymmetries as a function of the excitation energy for the proton emission angle $\theta ={120}^{°}$. The full thin lines have been obtained with the OB currents only, the dotted lines by adding the SRC, the dashed lines by including MEC, and the thick continous lines by considering both MEC and SRC. The dashed-dotted lines include OB, seagull and pionic currents and SRC.Reuse & Permissions

Figure 11

Cross sections as a function of the excitation energy for a proton emission angle $\theta ={120}^{°}$. The thin lines have been obtained by using OB currents only, and the thick lines include MEC and SRC effects. The solid, dotted, and dashed lines represent the unpolarized cross section $\sigma ,{\sigma }_{\parallel }$, and ${\sigma }_{\perp }$, respectively.Reuse & Permissions