Document Type

Article

Publication Date

2013

DOI

10.1103/PhysRevC.87.045206

Publication Title

Physical Review C

Volume

87

Issue

4

Pages

045206

Abstract

Experimental results on the Σ+(1189) hyperon transverse polarization in photoproduction on a hydrogen target using the CLAS detector at Jefferson Laboratory are presented. The Σ+(1189) was reconstructed in the exclusive reaction γ+p→K0S+Σ+(1189) via the Σ+→pπ0 decay mode. The K0S was reconstructed in the invariant mass of two oppositely charged pions with the π0 identified in the missing mass of the detected pπ+π− final state. Experimental data were collected in the photon energy range Eγ=1.0 –3.5 GeV (√s range 1.66–2.73 GeV). We observe a large negative polarization of up to 95% . As the mechanism of transverse polarization of hyperons produced in unpolarized photoproduction experiments is still not well understood, these results will help to distinguish between different theoretical models on hyperon production and provide valuable information for the searches of missing baryon resonances.

Comments

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Original Publication Citation

Collaboration, C., Nepali, C. S., Amaryan, M., Adhikari, K. P., Aghasyan, M., Anefalos Pereira, S., . . . Zonta, I. (2013). Transverse polarization of Σ+ (1189) in photoproduction on a hydrogen target in CLAS. Physical Review C, 87(4), 045206. doi:10.1103/PhysRevC.87.045206

ORCID

0000-0001-7282-8120 (Hyde, Charles), 0000-0003-2243-6836 (Kuhn, Sebastian),

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