This title appears in the Scientific Report :
2022
Please use the identifier:
http://hdl.handle.net/2128/32591 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2022.136985 in citations.
Beam-spin asymmetry Σ for Σ− hyperon photoproduction off the neutron
Beam-spin asymmetry Σ for Σ− hyperon photoproduction off the neutron
We report a new measurement of the beam-spin asymmetry, , for the γ n → K +− reaction usingquasi-free neutrons in a liquid-deuterium target. The new dataset includes data at previously unmeasuredphoton energy and angular ranges, thereby providing new constraints on partial wave analyses used toextra...
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Please use the identifier: http://dx.doi.org/10.1016/j.physletb.2022.136985 in citations.
We report a new measurement of the beam-spin asymmetry, , for the γ n → K +− reaction usingquasi-free neutrons in a liquid-deuterium target. The new dataset includes data at previously unmeasuredphoton energy and angular ranges, thereby providing new constraints on partial wave analyses used toextract properties of the excited nucleon states. The experimental data were obtained using the CEBAFLarge Acceptance Spectrometer (CLAS), housed in Hall B of the Thomas Jefferson National AcceleratorFacility (JLab). The CLAS detector measured reaction products from a liquid-deuterium target produced byan energy-tagged, linearly polarised photon beam with energies in the range 1.1 to 2.3 GeV. Predictionsfrom an isobar model indicate strong sensitivity to N(1720)3/2+, (1900)1/2−, and N(1895)1/2−,which corroborates results from a recent combined analysis of all K channels. When our data areincorporated in the fits of partial-wave analyses, one observes significant changes in γ -n couplings ofresonances which have small branching ratios to the π N channel |