JLab Measurements of the He3 Form Factors at Large Momentum Transfers
- Camsonne, A;
- Katramatou, AT;
- Olson, M;
- Acha, A;
- Allada, K;
- Anderson, BD;
- Arrington, J;
- Baldwin, A;
- Chen, J-P;
- Choi, S;
- Chudakov, E;
- Cisbani, E;
- Craver, B;
- Decowski, P;
- Dutta, C;
- Folts, E;
- Frullani, S;
- Garibaldi, F;
- Gilman, R;
- Gomez, J;
- Hahn, B;
- Hansen, J-O;
- Higinbotham, DW;
- Holmstrom, T;
- Huang, J;
- Iodice, M;
- Jiang, X;
- Kelleher, A;
- Khrosinkova, E;
- Kievsky, A;
- Kuchina, E;
- Kumbartzki, G;
- Lee, B;
- LeRose, JJ;
- Lindgren, RA;
- Lott, G;
- Lu, H;
- Marcucci, LE;
- Margaziotis, DJ;
- Markowitz, P;
- Marrone, S;
- Meekins, D;
- Meziani, Z-E;
- Michaels, R;
- Moffit, B;
- Norum, B;
- Petratos, GG;
- Puckett, A;
- Qian, X;
- Rondon, O;
- Saha, A;
- Sawatzky, B;
- Segal, J;
- Shabestari, M;
- Shahinyan, A;
- Solvignon, P;
- Sparveris, N;
- Subedi, RR;
- Suleiman, R;
- Sulkosky, V;
- Urciuoli, GM;
- Viviani, M;
- Wang, Y;
- Wojtsekhowski, BB;
- Yan, X;
- Yao, H;
- Zhang, W-M;
- Zheng, X;
- Zhu, L
- et al.
Abstract
The charge and magnetic form factors, F_{C} and F_{M}, respectively, of ^{3}He are extracted in the kinematic range 25 fm^{-2}≤Q^{2}≤61 fm^{-2} from elastic electron scattering by detecting ^{3}He recoil nuclei and scattered electrons in coincidence with the two High Resolution Spectrometers of the Hall A Facility at Jefferson Lab. The measurements find evidence for the existence of a second diffraction minimum for the magnetic form factor at Q^{2}=49.3 fm^{-2} and for the charge form factor at Q^{2}=62.0 fm^{-2}. Both minima are predicted to exist in the Q^{2} range accessible by this Jefferson Lab experiment. The data are in qualitative agreement with theoretical calculations based on realistic interactions and accurate methods to solve the three-body nuclear problem.