Differential Cross Sections for 𝛾 + p → K⁺ + Y for Λ and Σ⁰ Hyperons

Authors

H. Bagdasaryan, Old Dominion University
M. Bektasoglu, Old Dominion University
S. L. Careccia, Old Dominion University
S. Bültmann, Old Dominion UniversityFollow
G. E. Dodge, Old Dominion UniversityFollow
N. Guler, Old Dominion University
C. E. Hyde-Wright, Old Dominion UniversityFollow
H. G. Juengst, Old Dominion University
A. V. Klimenko, Old Dominion University
S. E. Kuhn, Old Dominion UniversityFollow
S. Tkachenko, Old Dominion University
L. B. Weinstein, Old Dominion UniversityFollow
J. Zhang, Old Dominion University
et al.
CLAS Collaboration

Document Type

Article

Publication Date

2006

DOI

10.1103/PhysRevC.73.035202

Publication Title

Physical Review C.

Volume

73

Issue

3

Pages

1-36

Abstract

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 _K^c.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.

Comments

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Publisher's version available at: https://doi.org/10.1103/PhysRevC.73.035202

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

ORCID

0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde-Wright), 0000-0003-2243-6836 (Kuhn)

Repository Citation

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.
https://digitalcommons.odu.edu/physics_fac_pubs/475