Publications
Publication Information
| Title | The X17 boson and the 3H(p,e+e-)4He and 3He(n,e+e-)4He processes: a theoretical analysis |
| Authors | Michele Viviani, E. Filandri, Luca Girlanda, C. Gustavino, Alejandro Kievsky, Laura Marcucci, Rocco Schiavilla |
| JLAB number | JLAB-THY-21-3351 |
| LANL number | arXiv:2104.07808 |
| Other number | DOE/OR/23177-5170 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review C Volume 105 Page(s) 014001 Refereed | |
| Publication Abstract: | The present work deals with e -e production in the four-nucleon system. We first analyze the process as a purely electromagnetic one in the context of a state-of-the-art approach to nuclear strong-interaction dynamics and nuclear electromagnetic currents, that is derived from chiral effec- tive field theory (?EFT). Next, we examine how the exchange of a hypothetical low-mass boson would impact the cross section for such a process. We consider several possibilities, that this bo- son is either a scalar, pseudoscalar, vector, or axial particle. The ab initio calculations use exact hyperspherical-harmonics methods to describe the bound state and low-energy spectrum of the A = 4 continuum, and fully account for initial state interaction effects in the 3 + 1 clusters. While electromagnetic interactions are treated to high orders in the chiral expansion, the interactions of the hypothetical boson with nucleons are modeled in leading-order ?EFT (albeit, in some instances, selected subleading contributions are also accounted for). We also provide an overview of possible future experiments probing pair production in the A = 4 system at a number of candidate facilities. |
| Experiment Numbers: | |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevC.105.014001 |
| Accepted Manuscript: | 2104.07808.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |