Zachariou, Nicholas orcid.org/0000-0001-7621-5612, Munevar, Edwin, Berman, Barry et al. (10 more authors) (2022) Beam-spin asymmetry $Σ$ for $Σ^-$ hyperon photoproduction off the neutron. Physics Letters B. 136985. ISSN 0370-2693
Abstract
We report a new measurement of the beam-spin asymmetry $\boldsymbol{\Sigma}$ for the $\vec{\gamma} n \rightarrow K^+\Sigma^-$ reaction using quasi-free neutrons in a liquid-deuterium target. The new dataset includes data at previously unmeasured photon energy and angular ranges, thereby providing new constraints on partial wave analyses used to extract properties of the excited nucleon states. The experimental data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS), housed in Hall B of the Thomas Jefferson National Accelerator Facility (JLab). The CLAS detector measured reaction products from a liquid-deuterium target produced by an energy-tagged, linearly polarised photon beam with energies in the range 1.1 to 2.3 GeV. Predictions from an isobar model indicate strong sensitivity to $N(1720)3/2^+$, $\Delta(1900)1/2^-$, and $N(1895)1/2^-$, with the latter being a state not considered in previous photoproduction analyses. When our data are incorporated in the fits of partial-wave analyses, one observes significant changes in $\gamma$-$n$ couplings of the resonances which have small branching ratios to the $\pi N$ channel.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Author(s). |
Keywords: | nucl-ex,hep-ex |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/V001035/1 SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/P004385/2 |
Depositing User: | Pure (York) |
Date Deposited: | 08 Dec 2022 12:30 |
Last Modified: | 03 Apr 2025 04:27 |
Published Version: | https://doi.org/10.1016/j.physletb.2022.136985 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.physletb.2022.136985 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:194219 |
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Filename: 1_s2.0_S0370269322001198_main.pdf
Description: Beam-spin asymmetry � for �− hyperon photoproduction off the neutron
Licence: CC-BY 2.5
Filename: 2106.13957v2.pdf
Description: 2106.13957v2