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- W2974271851 abstract "The Chiral Confining Lagrangian, based on the chiral theory with quark degrees of freedom, is used to study the spectroscopy of scalar mesons. The formalism does not contain arbitrary fitting parameters and takes into account infinite number of transitions from meson-meson to quark-antiquark states. Starting from known $qbar q$ poles the transition coefficients ensure the strong shift of the poles for the $pipi$ and much smaller shift for the $Kbar K$ systems. The resulting amplitudes $f_{pipi}$ and $f_{Kbar K}$ are calculated in terms of the $qbar q$ and the free meson Green's functions. With the account of the $pipi/Kbar{K}$ channel coupling one obtains two resonances: a wide resonance $E_1$ in the range 500-700 MeV and narrow $E_2 $ near 1 GeV, which can be associated with $f_0(500)$ and $f_0(980)$. A similar analysis, applied to the $I=1$ channel, shows that in this case two very close poles in different sheets appear near $E=980$ MeV, which can be associated with the $a_0 (980)$ resonance. The obtained $pipi$ interaction amplitudes, $operatorname{Re} f_{pipi} (E)$ and $operatorname{Im} f_{pipi}(E)$ are compared with the known data." @default.
- W2974271851 created "2019-09-26" @default.
- W2974271851 creator A5043234302 @default.
- W2974271851 creator A5059394909 @default.
- W2974271851 date "2020-05-26" @default.
- W2974271851 modified "2023-09-27" @default.
- W2974271851 title "Scalar mesons in a chiral theory with quark degrees of freedom" @default.
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- W2974271851 doi "https://doi.org/10.1103/physrevd.101.094028" @default.
- W2974271851 hasPublicationYear "2020" @default.
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