Properties of the resonance Λ(1520) as seen in the forward electroproduction at JLab hall A

Journal Article

High-resolution spectrometer measurements of the reaction H(e,e′K+)X at small Q2 are used to extract the mass and width of the Λ(1520). We investigate dependence of the resonance parameters on different parametrizations of the background and the resonance peak itself. Our final values for the Breit-Wigner parameters are M=1520.4±0.6(stat.)±1.5(syst.)MeV and Γ=18.6±1. 9(stat.)±1(syst.)MeV. The width appears to be more sensitive to the assumptions than the mass. We also estimate, for the first time, the pole position for this resonance and find that both the pole mass and width seem to be smaller than their Breit-Wigner values. © 2011 American Institute of Physics.

Full Text

Duke Authors

Cited Authors

  • Strakovsky, II; Qiang, Y; Azimov, YI; Briscoe, WJ; Gao, H; Higinbotham, DW; Nelyubin, VV

Published Date

  • November 10, 2011

Published In

Volume / Issue

  • 1374 /

Start / End Page

  • 181 - 184

Electronic International Standard Serial Number (EISSN)

  • 1551-7616

International Standard Serial Number (ISSN)

  • 0094-243X

Digital Object Identifier (DOI)

  • 10.1063/1.3647120

Citation Source

  • Scopus