Near-threshold photoproduction of ϕ mesons from deuterium
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.
Physics Letters B
Qian, X.; Biselli, Angela; and CLAS Collaboration, "Near-threshold photoproduction of ϕ mesons from deuterium" (2011). Physics Faculty Publications. 167.
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