Properties of the ∧(1520) resonance from high-precision electroproduction data
Journal Article (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 "(1520). We investigate the influence of various assumptions used in the extraction. The width appears to be more sensitive to the assumptions than the mass. To reach a width uncertainty about 1 MeV or better, one needs to know the structure of the non-resonant background. Based on the new Jefferson Lab Hall A data, our final values for the Breit-Wigner parameters are M=1520.4±0.6(stat.)±1.5(syst.) MeV, Γ=18.6±1.9(stat.)±1(syst.) MeV. 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. © 2010 Elsevier B.V.
Full Text
Duke Authors
Cited Authors
- Qiang, Y; Azimov, YI; Strakovsky, II; Briscoe, WJ; Gao, H; Higinbotham, DW; Nelyubin, VV
Published Date
- November 1, 2010
Published In
Volume / Issue
- 694 / 2
Start / End Page
- 123 - 128
International Standard Serial Number (ISSN)
- 0370-2693
Digital Object Identifier (DOI)
- 10.1016/j.physletb.2010.09.052
Citation Source
- Scopus