4.5 Article

Beam asymmetry Σ for the photoproduction of η and η' mesons at Eγ=8.8 GeV

期刊

PHYSICAL REVIEW C
卷 100, 期 5, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.100.052201

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资金

  1. Natural Sciences and Engineering Research Council of Canada [SAPPJ-2018-00021]
  2. U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-FG02-87ER40315, DE-AC05-06OR23177]
  3. U.S. Department of Energy
  4. U.S. National Science Foundation
  5. German Research Foundation
  6. GSI Helmholtzzentrum fur Schwerionenforschung GmbH
  7. Russian Foundation for Basic Research
  8. U.K. Science and Technology Facilities Council
  9. Chilean Comision Nacional de Investigacion Cientifica y Tecnologica
  10. National Natural Science Foundation of China
  11. China Scholarship Council
  12. STFC [ST/P004458/1] Funding Source: UKRI

向作者/读者索取更多资源

We report on the measurement of the beam asymmetry Sigma for the reactions (gamma) over right arrowp -> p eta and (gamma) over right arrowp -> p eta' from the GlueX experiment using an 8.2-8.8-GeV linearly polarized tagged photon beam incident on a liquid hydrogen target in Hall D at Jefferson Laboratory. These measurements are made as a function of momentum transfer -t with significantly higher statistical precision than our earlier. measurements and are the first measurements of eta' in this energy range. We compare the results to theoretical predictions based on t-channel quasiparticle exchange. We also compare the ratio of Sigma(eta) to Sigma(eta)' to these models as this ratio is predicted to be sensitive to the amount of s (s) over bar exchange in the production. We find that photoproduction of both eta and eta' is dominated by natural parity exchange with little dependence on -t.

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