Publications
Publication Information
| Title | Moments of angular distribution and beam asymmetries in np0 photoproduction at GlueX |
| Authors | Miguel Albaladejo, Vincent Mathieu, Andrew Jackura, Mikhail Mikhasenko, Adam Szczepaniak, Alessandro Pilloni, CESAR FERNANDEZ RAMIREZ |
| JLAB number | JLAB-THY-19-2958 |
| LANL number | arXiv:1906.04841 |
| Other number | DOE/OR/23177-4700 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Other |
| Other Funding: | DOE NSF Ministerio de Ciencia, Innovacion y Universidade |
|
Journal Compiled for Physical Review D Volume 100 Page(s) 054017 Refereed | |
| Publication Abstract: | In the search for exotic mesons, the GlueX collaboration will soon extract moments of the $\eta\pi^0$ angular distribution. In the perspective of these results, we generalize the formalism of moment extraction to the case in which the two mesons are produced with a linearly polarized beam, and build a model for the reaction $\vec \gamma p \to \eta \pi^0 p$. The model includes resonant $S$-, $P$-, $D$-waves in $\eta\pi$, produced by natural exchanges. Moments of the $\eta\pi^0$ angular distribution are computed with and without the $P$-wave, to illustrate the sensitivity to exotic resonances. Although little sensitivity to the $P$-wave is found in moments of even angular momentum, moments of odd angular momentum are proportional to the interference between the $P$-wave and the dominant $S$- and $D$-waves. We also generalize the definition of the beam asymmetry for two mesons photoproduction and show that, when the meson momenta are perpendicular to the reaction plane, the beam asymmetry enhances the sensitivity to the exotic $P$-wave. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.100.054017 |
| Accepted Manuscript: | PhysRevD.100.054017.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |