Measurement of spin density matrix elements in Λ(1520) photoproduction at 8.2-8.8 GeV

GlueX Collaboration

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We report on the measurement of spin density matrix elements of the Λ(1520) in the photoproduction reaction γp→Λ(1520)K+, via its subsequent decay to K-p. The measurement was performed as part of the GlueX experimental program in Hall D at Jefferson Laboratory using a linearly polarized photon beam with Eγ=8.2GeV-8.8GeV. These are the first such measurements in this photon energy range. Results are presented in bins of momentum transfer squared, -(t-t0). We compare the results with a Reggeon exchange model and determine that natural exchange amplitudes are dominant in Λ(1520) photoproduction.

Original languageEnglish
Article number035201
Number of pages10
JournalPhysical Review C
Issue number3
Publication statusPublished - 3 Mar 2022

Bibliographical note

Funding Information:
We would like to acknowledge the outstanding efforts of the staff of the Accelerator and the Physics Divisions at Jefferson Laboratory that made the experiment possible. We also would like to thank B.-G. Yu for helpful discussions and sharing his calculations with us. This work was supported in part by the U.S. Department of Energy, the U.S. National Science Foundation, the German Research Foundation, Forschungszentrum Jülich GmbH, GSI Helmholtzzentrum für Schwerionenforschung GmbH, the Natural Sciences and Engineering Research Council of Canada, the Russian Foundation for Basic Research, the UK Science and Technology Facilities Council, the Chilean Comisión Nacional de Investigación Científica y Tecnológica, the National Natural Science Foundation of China and the China Scholarship Council. V.M. is a Serra Húnter fellow and acknowledges support from the Community of Madrid through the Programa de atraccin de talento investigador 2018-T1/TIC-10313 and from the Spanish national Grant No. PID2019-106080GB-C21. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC05-06OR23177.

Publisher Copyright:
© 2022 American Physical Society.

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