arXiv subjects

K. H. Hicks

Publications and source records attributed to K. H. Hicks.

2 recordsLinked to original sources

arXiv2005

Search for the $Θ^+$ in Photoproduction on the Deuteron

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 $γd \to p K^- K^+ n$ 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 $γn \to K^- Θ^+$ was estimated to be about 4-5 nb, using a model-dependent correction for rescattering determined from $Λ$(1520) production. Other reactions with less model-dependence are being pursued.

hep-ex↗

arXiv2005

Evidence for the Strangeness S=+1 Pentaquark from LEPS and CLAS Experiments

There are now several experimental collaborations that have seen evidence for a narrow state in the mass spectrum of the ($nK^+$) system. Two of these experiments, from the LEPS collaboration in Japan and the CLAS collaboration in the USA, are described briefly. Both use similar photoproduction reactions with a $K^+K^-$ pair in the final state. In addition, data from the CLAS collaboration for the $γp \to K_s K^+ n$ reaction are presented for the first time, which has no prominant peak in the ($nK^+$) mass spectrum when the $K_s$ angle is limited to forward angles.

hep-ex↗