On the Sigma^0 --> Lambda^0 + gamma decay in the Effective quark model with chiral U(3)xU(3) symmetry

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dc.creatorIvanov, A. N.
dc.creatorBerdnikov, A. Ya.
dc.creatorBerdnikov, Ya. A.
dc.creatorFaber, M.
dc.creatorIvanova, V. A.
dc.creatorKosmach, V. F.
dc.creatorNikitchenko, A. V.
dc.creatorTroitskaya, N. I.
dc.date2005-12-14
dc.date.accessioned2026-07-07T06:54:14Z
dc.date.available2026-07-07T06:54:14Z
dc.descriptionWe analyse the angular distributions of the Sigma^0 --> Lambda^0 + gamma decay rate in the laboratory and in the rest frame of the Sigma^0 - hyperon in the dependence on baryon polarizations. We calculate the dynamical polarization vector of the Lambda^0 - hyperon. Within the Effective quark model with chiral U(3) x U(3) symmetry (PRC 59, 451 (1999)) we calculate the transition magnetic moment mu_(Sigma^0 Lambda^0). The theoretical value mu_(Sigma^0 Lambda^0) = - 1.62, measured in nuclear magnetons, agrees well with the experimental data |mu^(\exp)_(Sigma^0 Lambda^0)| = (1.61 +/-0.08) and the theoretical result, predicted within the naive quark model mu_(Sigma^0 Lambda^0) = (\sqrt{3}/4)(mu_(Sigma^-) - mu_(Σ^+)) = (- 1.57 +/- 0.01).
dc.description10 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/hep-ph/0512176
dc.identifierhttp://arxiv.org/abs/hep-ph/0512176
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/105868
dc.subjectHigh Energy Physics - Phenomenology
dc.titleOn the Sigma^0 --> Lambda^0 + gamma decay in the Effective quark model with chiral U(3)xU(3) symmetry
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