Search for the Theta+ in photoproduction on the deuteron
2007
A high-statistics experiment on a deuterium target was performed using a real photon beam with energies up to 3.6 GeV at the CLAS detector of Jefferson Lab. The reaction reported here is for {gamma}d {yields} pK{sup -} K{sup +} n where the neutron was identified using the missing mass technique. No statistically significant narrow peak in the mass region from 1.5-1.6 GeV was found. An upper limit on the elementary process {gamma}n {yields} K{sup -} {Theta}{sup +} was estimated to be about 4-5 nb, using a model-dependent correction for rescattering determined from {Lambda}(1520) production. Other reactions with less model-dependence are being pursued.
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