JLab Measurements of the ^{3}He Form Factors at Large Momentum Transfers.

5 years ago

JLab Measurements of the ^{3}He Form Factors at Large Momentum Transfers.

C Dutta, Z-E Meziani, L Zhu, N Sparveris, M Shabestari, A Saha, F Garibaldi, X Jiang, J Arrington, B Sawatzky, S Marrone, K Allada, A Shahinyan, A Kievsky, S Choi, J Huang, V Sulkosky, A Acha, B Lee, X Qian, A Puckett, E Kuchina, J Segal, B Norum, P Markowitz, D W Higinbotham, P Solvignon, G Kumbartzki, D J Margaziotis, B Hahn, E Cisbani, A Kelleher, R Gilman, A T Katramatou, A Baldwin, X Zheng, R Suleiman, E Khrosinkova, D Meekins, Y Wang, J Gomez, E Folts, R A Lindgren, H Lu, T Holmstrom, X Yan, H Yao, G M Urciuoli, J J LeRose, M Viviani, L E Marcucci, J-P Chen, M Olson, M Iodice, B B Wojtsekhowski, A Camsonne, B D Anderson, S Frullani, E Chudakov, B Craver, G G Petratos, B Moffit, W-M Zhang, J-O Hansen, O Rondon, G Lott, R R Subedi, P Decowski, R Michaels

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.

Publisher URL: http://doi.org/10.1103/PhysRevLett.119.162501

DOI: 10.1103/PhysRevLett.119.162501