Compton scattering from He4 at the TUNL HIγS facility

作者：X. Li, M. W. Ahmed, A. Banu, C. Bartram, B. J. Crowe, E. J. Downie, M. Emamian, G. J. Feldman, H. Gao, D. Godagama, Harald W. Grießhammer, C. R. Howell, H. J. Karwowski, D. P. Kendellen, M. A. Kovash, K. K. H. Leung, D. M. Markoff, S. Mikhailov, R. E. Pywell, M. H. Sikora, Jack Silano, R. S. Sosa, M. Spraker, G. Swift, P. Wallace, H. R. Weller, C. S. Whisnant, Y. Wu, Zhiwen Zhao · 发表于：Physical Review C · 年份：2020 · DOI：10.1103/physrevc.101.034618 · 被引用次数：11 · 研究领域：Particle physics theoretical and experimental studies、Quantum Chromodynamics and Particle Interactions、High-Energy Particle Collisions Research

Differential cross sections for elastic Compton scattering from $^{4}\mathrm{He}$ have been measured with high statistical precision at the High Intensity $\ensuremath{\gamma}$-ray Source at laboratory scattering angles of ${55}^{\ensuremath{\circ}}$, ${90}^{\ensuremath{\circ}}$, and ${125}^{\ensuremath{\circ}}$ using a quasi-monoenergetic photon beam with a weighted mean energy value of 81.3 MeV. The results are compared to previous measurements and similar fore-aft asymmetry in the angular distribution of the differential cross sections is observed. This experimental work is expected to strongly motivate the development of effective-field-theory calculations of Compton scattering from $^{4}\mathrm{He}$ to fully interpret the data.