Physical Review C.
High-statistics cross sections for the reactions 𝛾 + p → K⁺ + Λ and 𝛾 + p → K⁺ + Σ⁰ have been measured using CLAS at Jefferson Lab for center-of-mass energies W between 1.6 and 2.53 GeV, and for -0.85 < cos θ Kc.m. < +0.95. In the K⁺ + Λ channel we confirm a resonance-like structure near W=1.9 GeV at backward kaon angles. The position and width of this structure change with angle, indicating that more than one resonance is likely playing a role. The K⁺ + Λ channel at forward angles and all energies is well described by a t-channel scaling characteristic of Regge exchange, whereas the same scaling applied to the K⁺ + Σ⁰ channel is less successful. Several existing theoretical models are compared to the data, but none provide a good representation of the results.
Original Publication Citation
Bültmann, S., Dodge, G.E., Hyde-Wright, C.E., Kuhn, S.E., Weinstein, L.B., CLAS Collaboration (2006) Differential cross sections for 𝛾 + p → K⁺ + Y for Λ and Σ⁰ hyperons. Physical Review C, 73(3), 1-36, Article 035202. https://doi.org/10.1103/PhysRevC.73.035202
0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde-Wright), 0000-0003-2243-6836 (Kuhn)
Bagdasaryan, H.; Bektasoglu, M.; Careccia, S. L.; Bültmann, S.; Dodge, G. E.; Guler, N.; Hyde-Wright, C. E.; Juengst, H. G.; Klimenko, A. V.; Kuhn, S. E.; Tkachenko, S.; Weinstein, L. B.; Zhang, J.; et al.; and CLAS Collaboration, "Differential Cross Sections for 𝛾 + p → K⁺ + Y for Λ and Σ⁰ Hyperons" (2006). Physics Faculty Publications. 475.