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

• Published in: Physics letters. B 2004-12, Vol.604 (1-2), p.22-30
• Main Authors: Antipov, Yu.M., Artamonov, A.V., Batarin, V.A., Vavilov, D.V., Victorov, V.A., Eroshin, O.V., Golovkin, S.V., Gorin, Yu.P., Kolganov, V.Z., Kozhevnikov, A.P., Konstantinov, A.S., Kubarovsky, V.P., Kurshetsov, V.F., Landsberg, L.G., Leontiev, V.M., Lomkatsi, G.S., Molchanov, V.V., Mukhin, V.A., Nilov, A.F., Patalakha, D.I., Petrenko, S.V., Smolyankin, V.T.
• Format: Article
• Language: English
• Subjects: Baryons (including antiparticles); Decays of baryons; Exact sciences and technology; Hyperon radiative decay; Hyperons; Leptonic and semileptonic decays; Physics; Properties of specific particles; Specific reactions and phenomenology; The physics of elementary particles and fields
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2004.10.050

The radiative decay Λ(1520)→Λγ was measured directly in the study of the exclusive diffractive-like reaction p+N→Λ(1520)K++N, Λ(1520)→Λγ with 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))×10−2 and Γ[Λ(1520)→Λγ]=159±33(stat)±26(syst) keV.