Measurement of the radiative decay width Γ[Λ(1520) --> Λγ] with the SPHINX spectrometer
arXiv:hep-ex/0406039 · doi:10.1016/j.physletb.2004.10.050
Abstract
The radiative decay Λ(1520) --> Λγwas measured directly in the study of exclusive diffractive-like reaction p + N --> Λ(1520) K^+ + N, Λ(1520) --> Λγwith the SPHINX spectrometer. The values of the branching and partial width of this radiative decay were obtained: BR[Λ(1520) --> Λγ] = (1.02+/-0.21(stat)+/-0.15(syst))x10^{-2} and Γ[Λ(1520) --> Λγ] = 159+/-33(stat)+/-26(syst) keV.
More detailed treatment of systematical uncertainties, minor clarifications and corrections, significant improvements in English. 18 pages, 6 figures, accepted by Phys.Lett.B