STI Publications - View Publication Form #15399
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Publication Information
| Title | Spin Asymmetries and Helicity Amplitudes on Photo-Production from Polarized Neutrons | ||||
| Abstract | Pseudoscalar meson photoproduction experiments lead the search for an expanded $N^*$ spectroscopy that is required by lattice solutions of QCD. Extensive data have been collected with proton targets that can potentially over-determine the production amplitude and allow a search for weak resonances. In contrast, data on photoproduction from neutrons is drastically limited. Both are needed since the $\gamma p N^*$ and $\gamma n N^*$ photo-couplings to {\small {\it I}=$1/2$} states are different and provide complementary information on the mechanisms for resonance excitation. The main subtleties in experiments with an effective polarized neutron target are reviewed. The considerable impact of new polarization data on multipole analyses are discussed, using the example of recent $\pi^- p$ measurements of the beam-target helicity asymmetry ($E$) from polarized $H\!D$ in CLAS at Jefferson Lab. New partial wave analyses incorporating these data have found significant changes in helicity ampli | ||||
| Author(s) | Andy Sandorfi | ||||
| Publication Date | March 2019 | ||||
| Document Type | Meeting, Journal Article, Proceedings | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Exp Nuclear Physics / Experimental Halls / Hall B | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | Yes | ||||
| Experiment Number(s) |
E06-101
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| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Meeting / Conference
| Meeting Name | NStar 2017 |
| Meeting Date | 8/20/2017 |
| Document Subtype | Invited Talk (proceedings) |
Journal Article
| Journal Name | Few Body Systems |
| Refereed | Yes |
| Volume | 60 |
| Issue | 1 |
| Page(s) | 10 |
Proceedings
| Title | Proceedings of NSTAR 2017. (Few Body Syst. 60 (2019) no.1) |
| Editor(s) | R. Gothe, Y. Ilieva, V. Mokeev, E. Santopinto, S. Strauch |
| Publisher | Springer |
| Refereed | Yes |
| Page Number | 10 |
| Year | 2019 |
Attachments/Datasets/DOI Link
| Document(s) |
Sandorfi_NSTAR17_FBSY-D-18-000731.pdf
(STI Document)
|
| DOI Link | |
| Dataset(s) | (none) |
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