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Measurement of the radiative decay width Γ[Λ(1520) --> Λγ] with the SPHINX spectrometer

Yu. M. Antipov·A. V. Artamonov·V. A. Batarin·D. V. Vavilov·V. A. Victorov·O. V. Eroshin·S. V. Golovkin·Yu. P. Gorin·V. Z. Kolganov·A. P. Kozhevnikov·A. S. Konstantinov·V. P. Kubarovsky·V. F. Kurshetsov·L. G. Landsberg·V. M. Leontiev·G. S. Lomkatsi·V. V. Molchanov·V. A. Mukhin·A. F. Nilov·D. I. Patalakha·S. V. Petrenko·V. T. Smolyankin
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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.

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Yu. M. Antipov, A. V. Artamonov, V. A. Batarin, D. V. Vavilov, V. A. Victorov, O. V. Eroshin, S. V. Golovkin, Yu. P. Gorin, V. Z. Kolganov, A. P. Kozhevnikov, A. S. Konstantinov, V. P. Kubarovsky, V. F. Kurshetsov, L. G. Landsberg, V. M. Leontiev, G. S. Lomkatsi, V. V. Molchanov, V. A. Mukhin, A. F. Nilov, D. I. Patalakha, S. V. Petrenko, V. T. Smolyankin. 2004-10-27. Measurement of the radiative decay width Γ[Λ(1520) --> Λγ] with the SPHINX spectrometer. https://doi.org/10.1016/j.physletb.2004.10.050

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