Incoherent φ photo-production from deuteron in SPring-8/LEPS

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We present measurements of differential cross sections and decay asymmetries of incoherent φ-meson photo-production from the deuteron at forward angles using linearly polarized photons beam in energy range from the production threshold to E=2.4GeV. The experiment was performed at the SPring-8/LEPS facility. The differential cross section of incoherent production shows a large suppression compared with the free proton case. The reduction for the deuteron cannot be clearly explained in terms of simple isospin asymmetry. The decay asymmetry of incoherent φ photo-production shows that the eta exchange process is small. Since the exclusive K+K-p cross section shows the same reduction with incoherent, both the proton and neutron cross section reduce similarly. Consequently, the π-η interference effect is small too. The present results suggest that our understanding of φ photo-production within a nucleus should be rearranged.

Original languageEnglish
Title of host publicationInternational Conference on the Structure of Baryons, BARYONS'10
Number of pages4
Publication statusPublished - 2011
EventInternational Conference on the Structure of Baryons, BARYONS'10 - Osaka, Japan
Duration: 2010 Dec 72010 Dec 11

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceInternational Conference on the Structure of Baryons, BARYONS'10


  • meson
  • phi
  • photo-production


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