Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2010-11-05
Phys. Lett.B696:338-342,2011
Physics
Nuclear Physics
Nuclear Experiment
Scientific paper
10.1016/j.physletb.2010.12.065
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.
Adhikari K. P.
Alaoui Ahmed El
Amaryan M.
Anghinolfi Marco
Ball Jacques
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