Near-threshold photoproduction of ϕ mesons from deuterium

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We report the first, kinematically-complete measurement of the differential cross section of ϕ-meson photoproduction from deuterium near the production threshold for a proton using the CLAS detector and a tagged-photon beam in Hall B at Jefferson Lab. The measurement was carried out by a triple coincidence detection of a proton, K+ and K− near the theoretical production threshold of 1.57 GeV. The extracted differential cross sections dƠ/dt source for the initial photon energy range of 1.65–1.75 GeV are consistent with predictions based on a quasifree mechanism. Our finding is different from recent LEPS results on ϕ-meson photoproduction from deuterium in a similar incident photon energy range, but in a different momentum transfer region.


© 2011 The Author(s).

Published by Elsevier B.V. under CC License Attribution 4.0 International (CC BY 4.0

Publication Title

Physics Letters B

Published Citation

Qian, X., W. Chen, H. Gao, K. Hicks, K. Kramer, J. M. Laget, T. Mibe, Biselli A., et al [CLAS Collaboration]. "Near-threshold photoproduction of ϕ mesons from deuterium." Physics Letters B 696, no. 4 (2011): 338-342. https://doi.org/10.1016/j.physletb.2010.12.065