Study of Two-Photon Exchange via the Beam Transverse Single Spin Asymmetry in Electron-Proton Elastic Scattering at Forward Angles over a Wide Energy Range
文献类型：期刊论文
| 作者 | Gou, B.2,3,4; Arvieux, J.1; Aulenbacher, K.2,3; Rios, D. Balaguer2; Baunack, S.2; Becker, D.2; Capozza, L.2,3; Deconinck, W.5,6,7; Diefenbach, J.2; Frascaria, R.1 |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2020-03-27 |
| 卷号 | 124期号:12页码:6 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/PhysRevLett.124.122003 |
| 通讯作者 | Gou, B.(boxingou@uni-mainz.de) |
| 英文摘要 | We report on a new measurement of the beam transverse single spin asymmetry in electron-proton elastic scattering, A(perpendicular to)(ep), at five beam energies from 315.1 to 1508.4 MeV and at a scattering angle of 30 degrees < theta < 40 degrees. The covered Q(2) values are 0.032, 0.057, 0.082, 0.218, 0.613 (GeV/c)(2). The measurement clearly indicates significant inelastic contributions to the two-photon-exchange (TPE) amplitude in the low-Q(2) kinematic region. No theoretical calculation is able to reproduce our result. Comparison with a calculation based on unitarity, which only takes into account elastic and pi N inelastic intermediate states, suggests that there are other inelastic intermediate states such as pi pi N, K Lambda, and eta N. Covering a wide energy range, our new high-precision data provide a benchmark to study those intermediate states. |
| WOS关键词 | POLARIZATION ; MAMI ; CONSTRAINTS ; MAINZ |
| 资助项目 | Deutsche Forschungsgemeinschaft (DFG)[SFB 443] ; Deutsche Forschungsgemeinschaft (DFG)[SFB 1044] ; PRISMA excellence cluster ; Office of China Postdoctoral Council (OCPC) |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000522196000004 |
| 资助机构 | Deutsche Forschungsgemeinschaft (DFG) ; PRISMA excellence cluster ; Office of China Postdoctoral Council (OCPC) |
| 源URL | [http://119.78.100.186/handle/113462/140656]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Gou, B. |
| 作者单位 | 1.Univ Paris Sud, CNRS, IN2P3, Inst Phys Nucl, F-91406 Orsay, France 2.Johannes Gutenberg Univ Mainz, Inst Kernphys, JJ Becherweg 45, D-55099 Mainz, Germany 3.Johannes Gutenberg Univ Mainz, Helmholtz Inst Mainz, Staudingerweg 18, D-55099 Mainz, Germany 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 5.MIT, Nucl Sci Lab, Cambridge, MA 02139 USA 6.MIT, Dept Phys, Cambridge, MA 02139 USA 7.Univ Manitoba, Dept Phys & Astron, 30A Sifton Rd, Winnipeg, MB R3T 2N2, Canada |
| 推荐引用方式 GB/T 7714 | Gou, B.,Arvieux, J.,Aulenbacher, K.,et al. Study of Two-Photon Exchange via the Beam Transverse Single Spin Asymmetry in Electron-Proton Elastic Scattering at Forward Angles over a Wide Energy Range[J]. PHYSICAL REVIEW LETTERS,2020,124(12):6. |
| APA | Gou, B..,Arvieux, J..,Aulenbacher, K..,Rios, D. Balaguer.,Baunack, S..,...&Zimmermann, I.(2020).Study of Two-Photon Exchange via the Beam Transverse Single Spin Asymmetry in Electron-Proton Elastic Scattering at Forward Angles over a Wide Energy Range.PHYSICAL REVIEW LETTERS,124(12),6. |
| MLA | Gou, B.,et al."Study of Two-Photon Exchange via the Beam Transverse Single Spin Asymmetry in Electron-Proton Elastic Scattering at Forward Angles over a Wide Energy Range".PHYSICAL REVIEW LETTERS 124.12(2020):6. |
入库方式： OAI收割
来源：近代物理研究所
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