Electroproduction of the Λ(1520) Hyperon

Authors

M. Bektasoglu, Old Dominion University
G. E. Dodge, Old Dominion UniversityFollow
T. A. Forest, Old Dominion University
C. E. Hyde-Wright, Old Dominion UniversityFollow
S. E. Kuhn, Old Dominion UniversityFollow
R. A. Niyazov, Old Dominion University
L. B. Weinstein, Old Dominion UniversityFollow
et al.
The CLAS Collaboration

Document Type

Article

Publication Date

2001

DOI

10.1103/PhysRevC.64.044601

Publication Title

Physical Review C

Volume

64

Issue

4

Pages

1-10

Abstract

The reaction e^→pe′K⁺Λ(1520) with Λ(1520)→p′K⁻ was studied at electron beam energies of 4.05, 4.25, and 4.46 GeV, using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The cos θ_K+, φ_K+, Q², and W dependencies of Λ(1520) electroproduction are presented for the kinematic region 0.9 < Q² < 2.4 GeV² and 1.95 < W < 2.65 GeV. Also, the Q² dependence of the Λ(1520) decay angular distribution is presented for the first time. The cosθ_K+ angular distributions suggest t-channel diagrams dominate the production process. Fits to the Λ(1520) t-channel helicity frame decay angular distributions indicate the m_z = ± ½ parentage accounts for about 60% of the total yield, which suggests this reaction has a significant contribution from t-channel processes with either K⁺ exchange or longitudinal coupling to an exchanged K*. The Q² dependence of the Λ(1520) production cross section is the same as that observed for Λ(1116) photo- and electroproduction.

Comments

© 2001 American Physical Society.

"Yes, the author or the author's employer may use all or part of the APS published article, including the APS-prepared version (e.g., the PDF from the online journal) without revision or modification, on the author's or employer's website as long as a fee is not charged. If a fee is charged, then APS permission must be sought. In all cases, the appropriate bibliographic citation and notice of the APS copyright must be included."

Publisher's version available at: https://doi.org/10.1103/PhysRevC.64.044601

Original Publication Citation

Dodge, G.E., Hyde-Wright, C.E., Kuhn, S.E., Weinstein, L.B., et al., The CLAS Collaboration (2001). Electroproduction of the Λ(1520) hyperon. Physical Review C, 64(4), 1-10, Article 044601. https://doi.org/10.1103/PhysRevC.64.044601

ORCID

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

Repository Citation

Bektasoglu, M.; Dodge, G. E.; Forest, T. A.; Hyde-Wright, C. E.; Kuhn, S. E.; Niyazov, R. A.; Weinstein, L. B.; et al.; and The CLAS Collaboration, "Electroproduction of the Λ(1520) Hyperon" (2001). Physics Faculty Publications. 483.
https://digitalcommons.odu.edu/physics_fac_pubs/483