Publications
Publication Information
| Title | Measurement of Spin-Density Matrix Elements in ¿++(1232) photoproduction |
| Authors | Farah Afzal, Malte Albrecht, Artur Amaryan, Shelby Arrigo, Viviana Arroyave, Arshak Asaturyan, Alexander Austregesilo, Alan Baldwin, Fernando Barbosa, Bryan Barlow, Edmundo Barriga Ruiz, Rebecca Barsotti, Daniel Barton, Vitaly Baturin, Vladimir Berdnikov, Andrew Black, Werner Boeglin, Mary Boer, Wilbert Briscoe |
| JLAB number | JLAB-PHY-24-4091 |
| LANL number | arXiv:2406.12829 |
| Other number | DOE/OR/23177-7531 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Prepared for Phys.Lett.B | |
| Publication Abstract: | We report the measurement of spin-density matrix elements of the ?++(1232) in the photoproduction reaction ?p ? ???++(1232) with the GlueX experiment in Hall D at Jefferson Lab. The measurement used a linearly polarized photon beam with E? = 8.2 ? 8.8 GeV and the statistical precision exceeds the previous measurement from SLAC by three orders of magnitude for the momentum transfer squared region ?t < 1.4 GeV2. The data are sensitive to the previously undetermined relative sign between couplings in existing Regge exchange models. Linear combinations of the extracted SDMEs allow for a decomposition into natural and unnatural exchange amplitudes, which shows that the unnatural exchange plays an important role in the low ?t region. |
| Experiment Numbers: | E12-06-102 |
| Group: | Hall D |
| Document: | |
| DOI: | |
| Accepted Manuscript: | |
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