[g13] Abstract for Few Body Conference

[Nicholas Zachariou]

Hi all, 

Would greatly appreciate feedback on the abstract I am submitting for the few-body conference. 

Thanks,
Nick

Determination of Polarization Observables Σ, Ox, and Oz for Final-State Interactions in the Reaction γd → K+Λn

N. Zachariou, Y. Ilieva, T. Cao, for the CLAS Collaboration

University of South Carolina

The study of final-state interactions in exclusive hyperon photoproduction off the deuteron is a promising approach to extract valuable information about the hyperon-nucleon (YN) interaction. In this process, a hyperon beam is produced in a first step on one of the loosely bound nucleons and scatters off the other nucleon in a second step. Exclusivity allows to filter out quasi-free production and obtain a sample of predominantly re-scattering events. Here we report preliminary results on the azimuthal asymmetry Σ, as well as the polarization transfer coefficients Ox and Oz for the reaction initiated with a linearly polarized photon beam. The data were taken with the CLAS detector in Hall B of Jefferson Lab in the E06-103 experiment. The large kinematic coverage of the CLAS combined with the exceptionally high quality of the experimental data allows identifying and selecting final-state interaction events in the reaction γd → K+Λn, to extract single- and double-polarization observables and to establish their kinematical dependencies. Our data cover photon energies between 1.1 and 2.3 GeV, kaon momenta between 0.9 and 1.9 GeV/c, and hyperon polar angles (measured relative to the momentum transfer to the Λn system) between 0 and 70 degrees. Our work is part of a larger program that aims in determining a large number of observables, which will be used to constrain the free parameters of the YN potential and eventually determine the Λn scattering length. This work is funded in part by the U.S. NSF under grant PHY-125782.

 
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