Probing for high-momentum protons in He 4 via the He 4 (e,e′p)X reactions
Physical Review C
Experimental cross sections for the He4(e,e′p)X reactions in the missing energy range from 0.017 to 0.022 GeV and up to a missing momentum of 0.632 GeV/c at xB=1.24 and Q2=2 (GeV/c)2 are reported. The data are compared to relativistic distorted-wave impulse approximation calculations for the He4(e,e′p)H3 channel. Significantly more events are observed for pm≥0.45 GeV/c than are predicted by the theoretical model, and striking fluctuations in the ratio of data to the theoretical model around pm=0.3GeV/c are possible signals of initial-state multinucleon correlations.
Iqbal, S., Benmokhtar, F., Ivanov, M., See, N., Aniol, K., Higinbotham, D., Boyd, C., Gadsby, A., Goodwill, J., Finton, D., Boyer, A., Gilad, S., Saha, A., Udias, J., Ye, Z., Solvignon, P., Aguilera, P., Ahmed, Z., & Albataineh, H. (2022). Probing for high-momentum protons in He 4 via the He 4 (e,e′p)X reactions. Physical Review C, 105 (6). https://doi.org/10.1103/PhysRevC.105.064003