Near-threshold Photoproduction of Phi Mesons from Deuterium

Abstract : We report the first measurement of the differential cross section on $\phi$-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 $\frac{d\sigma}{dt}$ for the initial photon energy from 1.65-1.75 GeV are consistent with predictions based on a quasifree mechanism. This experiment establishes a baseline for a future experimental search for an exotic $\phi$-N bound state from heavier nuclear targets utilizing subthreshold/near-threshold production of $\phi$ mesons.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00533626
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Submitted on : Monday, November 8, 2010 - 9:24:12 AM
Last modification on : Friday, November 27, 2020 - 5:52:10 AM

Citation

X. Qian, W. Chen, H. Gao, K. Hicks, K. Kramer, et al.. Near-threshold Photoproduction of Phi Mesons from Deuterium. Physics Letters B, Elsevier, 2011, 696, pp.338-342. ⟨10.1016/j.physletb.2010.12.065⟩. ⟨in2p3-00533626⟩

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