Document Type

Article

Publication Date

2004

DOI

10.1103/PhysRevC.69.042201

Publication Title

Physical Review C

Volume

69

Issue

4

Pages

1-5

Abstract

High-statistics cross sections and recoil polarizations for the reactions γ+p → K++ Λ and γ+p→K++ Σ0 have been measured at CLAS for center-of-mass energies between 1.6 and 2.3 GeV. In the K+Λ channel we confirm a resonance-like structure near W = 1.9 GeV at backward kaon angles. Our data show more complex s- and u- channel behavior than previously seen, since structure is also present at forward angles, but not at central angles. The position and width change with angle, indicating that more than one resonance is playing a role. Large positive Λ polarization at backward angles, which is also energy dependent, is consistent with sizable s- or u-channel contributions. Presently available model calculations cannot explain these aspects of the data.

Comments

© 2004 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.69.04220

Original Publication Citation

Dharmawardane, K.V., Dodge, G.E., Hyde-Wright, C.E., Kuhn, S.E., Qin, L.M., Weinstein, L.B., et al., CLAS Collaboration (2004). Hyperon photoproduction in the nucleon resonance region. Physical Review C, 69(4), 1-5, Article 042201. https://doi.org/10.1103/PhysRevC.69.042201

ORCID

0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde-Wright), 0000-0003-2243-6836 (Kuhn), 0000-0001-5416-2900 (Weinstein)

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