| Irfu-10-06
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| Differential cross section and recoil polarization measurements for the gamma p -> K+ Lambda reaction using CLAS at Jefferson Lab |
| M. E. McCracken et al. (J. Ball, F.X. Girod, B. Moreno, H. Moutarde, F. Sabatié) |
| We present measurements of the differential cross section and Lambda recoil polarization for the gamma p -> 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. |
