Abstract
Exclusive photoproduction of K+Λ final states off a proton target has been an important component in the search for missing nucleon resonances and our understanding of the production of final states containing strange quarks. Polarization observables have been instrumental in this effort. The current work is an extension of previously published CLAS results on the beam-recoil transferred polarization observables Cx and Cz. We extend the kinematic range up to invariant mass W = 3.33 GeV from the previous limit of W = 2.5 GeV with significantly improved statistical precision in the region of overlap. These data will provide for tighter constraints on the reaction models used to unravel the spectrum of nucleon resonances and their properties by not only improving the statistical precision of the data within the resonance region, but also constraining t-channel processes that dominate at higher W but extend into the resonance region.
| Original language | English |
|---|---|
| Article number | 065211 |
| Journal | Physical Review C |
| Volume | 112 |
| Issue number | 6 |
| DOIs | |
| State | Published - Dec 29 2025 |
| Externally published | Yes |
Funding
French Commissariat pour l’Energie Atomique, the U.K. Science and Technology Facilities Council, the National Research Foundation of Korea, the Chilean Agencia Na-cional de Investigacion y Desarrollo, and the Skobeltsyn Nuclear Physics Institute and Physics Department at the Lomonosov Moscow State University. This work was supported in part by the the U.S. Department of Energy, We thank Petr Bydžovský, Terry Mart, Deborah Rönchen, and Dalibor Skoupil for their efforts in preparing the model calculations for this paper. The authors would like to acknowledge the outstanding efforts of the staff of the Accelerator and the Physics Divisions at Jefferson Lab in making this experiment possible. This work was supported in part by the U.S. Department of Energy, the National Science Foundation, the Italian Istituto Nazionale di Fisica Nucleare, the French Centre National de la Recherche Scientifique, the Office of Science, Office of Nuclear Physics under Contract No. DE-AC05-06OR23177.