{"paper":{"title":"JLab Measurement of the $^4$He Charge Form Factor at Large Momentum Transfers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"nucl-ex","authors_text":"A. Acha, A. Baldwin, A. Camsonne, A. Kelleher, A. Kievsky, A. Puckett, A. Saha, A. Shahinyan, A. T. Katramatou, B. B. Wojtsekhowski, B. Craver, B. D. Anderson, B. Hahn, B. Lee, B. Moffit, B. Norum, B. Sawatzky, C. Dutta, D. Higinbotham, D. J. Margaziotis, D. Meekins, E. Chudakov, E. Cisbani, E. Folts, E. Khrosinkova, E. Kuchina, F. Garibaldi, G. G. Petratos, G. Kumbartzki, G. Lott, G. M. Urciuoli, H. Lu, H. Yao, J. Arrington, J. Gomez, J. Huang, J. J. Lerose, J.-O. Hansen, J.-P. Chen, J. Segal, K. Allada, L. E. Marcucci, L. Zhu, M. Iodice, M. Olson, M. Shabestari, M. Viviani, N. Sparveris, O. Rondon, P. Decowski, P. Markowitz, P. Solvignon, R. A. Lindgren, R. Gilman, R. Michaels, R. R. Subedi, R. Suleiman, S. Choi, S. Frullani, S. Marrone, T. Holmstrom, V. Sulkosky, W.-M. Zhang, X. Jiang, X. Qian, X. Yan, X. Zheng, Y. Wang, Z.-E. Meziani","submitted_at":"2013-09-20T15:23:50Z","abstract_excerpt":"The charge form factor of $^$4He has been extracted in the range 29 fm$^{-2}$ $\\le Q^2 \\le 77$ fm$^{-2}$ from elastic electron scattering, detecting $^4$He nuclei and electrons in coincidence with the High Resolution Spectrometers of the Hall A Facility of Jefferson Lab. The results are in qualitative agreement with realistic meson-nucleon theoretical calculations. The data have uncovered a second diffraction minimum, which was predicted in the $Q^2$ range of this experiment, and rule out conclusively long-standing predictions of dimensional scaling of high-energy amplitudes using quark counti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.5297","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}