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Chiral Approach to φ radiative decaysBlack, Deirdre, Harada, Masayasu, Schechter, Joseph January 2007 (has links)
No description available.
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A Study of the Reaction γd → ϖ<sup>+</sup>ϖ<sup>-</sup> d (From Vector Mesons to Possible Dibaryons)Chetry, Taya Nath 05 June 2019 (has links)
No description available.
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Scalar Meson Effects In Radiative Decays Of Vector MesonsKerman Solmaz, Saime 01 November 2003 (has links) (PDF)
The role of scalar mesons in radiative vector meson decays is
investigated. The effects of scalar-isoscalar f_{0}(980) and
scalar-isovector a_{0}(980) mesons are studied in the mechanism of the radiative Phi-> / pi{+}pi{-}gamma and
phi-> / pi{0}eta gamma decays, respectively. A
phenomenological approach is used to study the radiative
phi-> / pi{+}p{-}gamma decay by considering the
contributions of sigma-meson, rho-meson and f_{0}-meson.
The interference effects between different contributions are
analyzed and the branching ratio for this decay is calculated. The
radiative phi-> / pi{0}eta gamma decay is studied
within the framework of a phenomenological approach in which the contributions of rho-meson, chiral loop and a_{0}-meson are
considered. The interference effects between different
contributions are examined and the coupling constants g_{phi
a_{0} gamma} and g_{a_{0}K{+}K{-}} are estimated using the experimental branching ratio for the
phi-> / pi{0}eta gamma decay. Furthermore, the
radiative rho{0}pi{+}pi{-}gamma$ and
rho{0}-> / pi{0}pi{0}gamma decays are studied to
investigate the role of scalar-isoscalar sigma-meson. The
branching ratios of the rho{0}-> / pi{+}pi{-}gamma
and rho{0}-> / pi{0}pi{0}gamma decays are
calculated using a phenomenological approach by adding to the
amplitude calculated within the framework of chiral perturbation
theory and vector meson dominance the amplitude of sigma-meson
intermediate state. In all the decays studied the scalar meson
intermediate states make important contributions to the overall
amplitude.
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