Publications
Publication Information
| Title | Puzzle with the precession of the neutron spin |
| Authors | V. Sulkosky, C. Peng, J. Chen, A. Deur, S. Abrahamyan, K. Aniol, D. Armstrong, T. Averett, S. Bailey, A. Beck, P. Bertin, F. Butaru, W. Boeglin, A. Camsonne, G. Cates, C. Chang, Seonho Choi, E. Chudakov, L. Coman, J. Cornejo, B. Craver, F. Cusanno, R. De Leo, C. de Jager, J. Denton, S. Dhamija, R. Feuerbach, J. Finn, S. Frullani, K. Fuoti, H. Gao, F. Garibaldi, O. Gayou, R. Gilman, A. Glamazdin, C. Glashausser, J. Gomez, J. Hansen, D. Hayes, B. Hersman, D. Higinbotham, T. Holmstrom, T. Humensky, C. Hyde, H. Ibrahim, M. Iodice, X. Jiang, L. Kaufman, A. Kelleher, K. Keister, W. Kim, A. Kolarkar, N. Kolb, W. Korsch, K. Kramer, G. Kumbartzki, L. Lagamba, V. Laine, J. LeRose, D. Lhuillier, R. Lindgren, N. Liyanage, H.-J. Lu, B. Ma, D. Margaziotis, P. Markowitz, K. McCormick, M. Meziane, Z. Meziani, R. Michaels, B. Moffit, P. Monaghan, S. Nanda, J. Niedziela, M. Niskin, R. Pandolfi, K. Paschke, M. Potokar, A. Puckett, V. Punjabi, Y. Qiang, R. Ransome, B. Reitz, R. Roche, A. Saha, A. Shabetai, S. Sirca, J. Singh, K. Slifer, R. Snyder, P. Solvignon, R. Stringer, R. Subedi, W. Tobias, N. Ton, P. Ulmer, G. Urciuoli, A. Vacheret, E. Voutier, Kaiwen Wang, L. Wan, Bogdan Wojtsekhowski, S. Woo, H. Yao, J. Yuan, X. Zhan, X. Zheng, L. Zhu, G. Laveissiere |
| JLAB number | JLAB-PHY-21-3312 |
| LANL number | arXiv:2103.03333 |
| Other number | DOE/OR/23177-5119 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Nature Physics Volume 17 Page(s) 687–692 Refereed | |
| Publication Abstract: | Understanding the structure of the nucleon (proton and neutron) is a critical problem in physics. Especially challenging is to understand the spin structure when the Strong Interaction becomes truly strong. At energy scales below the nucleon mass ~1 GeV, the intense interactions of the quarks and gluons inside the nucleon makes them highly correlated. Their coherent behavior causes the emergence of effective hadronic degrees of freedom (hadrons are composite particles made of quarks and gluons) which are necessary to understand the nucleon properties. Theoretically studying this subject requires approaches employing non-perturbative techniques or using hadronic degrees of freedom, e.g. chiral effective field theory, XEFT. Here, we present measurements sensitive to the neutron's spin precession under electromagnetic fields. The observables, the generalized spin-polarizabilities delta_LT and gamma_0, which quantify the nucleon spin's precession, were measured at very low energy-momentum transfer squared Q^2 corresponding to probing distances of the size of the nucleon. Our Q^2 values match the domain where XEFT calculations are expected to be applicable. The calculations have been conducted to high degrees of sophistication, including that of the so-called "gold-plated" observable delta_LT. Surprisingly however, our data show a strong discrepancy with the XEFT calculations. This presents a challenge to the current description of the neutron's spin properties. |
| Experiment Numbers: | E97-110 |
| Group: | Hall A |
| Document: | |
| DOI: | https://doi.org/10.1038/s41567-021-01245-9 |
| Accepted Manuscript: | |
| Supporting Documents: | |
| Supporting Datasets: | |