Ho, D., Peng, P., Bass, C. et al. (145 more authors) (2017) Beam-Target Helicity Asymmetry for γ (over-right-arrow) n (over-right-arrow) → π − p in the N* Resonance Region. Physical Review Letters. 242002. ISSN 1079-7114
Abstract
We report the first beam-target double-polarization asymmetries in the γ+n(p)→π-+p(p) reaction spanning the nucleon resonance region from invariant mass W=1500 to 2300 MeV. Circularly polarized photons and longitudinally polarized deuterons in solid hydrogen deuteride (HD) have been used with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The exclusive final state has been extracted using three very different analyses that show excellent agreement, and these have been used to deduce the E polarization observable for an effective neutron target. These results have been incorporated into new partial wave analyses and have led to significant revisions for several γnN∗ resonance photocouplings.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 27 Sep 2018 12:50 |
Last Modified: | 26 Nov 2024 00:40 |
Published Version: | https://doi.org/10.1103/PhysRevLett.118.242002 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevLett.118.242002 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:136315 |