Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2009-12-21
Phys.Rev.C81:025201,2010
Physics
Nuclear Physics
Nuclear Experiment
22 pages, 16 figures
Scientific paper
10.1103/PhysRevC.81.025201
We present measurements of the differential cross section and Lambda recoil polarization for the gamma p to K+ Lambda reaction made using the CLAS detector at Jefferson Lab. These measurements cover the center-of-mass energy range from 1.62 to 2.84 GeV and a wide range of center-of-mass K+ production angles. Independent analyses were performed using the K+ p pi- and K+ p (missing pi -) final-state topologies; results from these analyses were found to exhibit good agreement. These differential cross section measurements show excellent agreement with previous CLAS and LEPS results and offer increased precision and a 300 MeV increase in energy coverage. The recoil polarization data agree well with previous results and offer a large increase in precision and a 500 MeV extension in energy range. The increased center-of-mass energy range that these data represent will allow for independent study of non-resonant K+ Lambda photoproduction mechanisms at all production angles.
Bellis Matt
for the CLAS Collaboration
McCracken Michael E.
Meyer Curtis A.
Williams Majorie
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