Properties of scalar – isoscalar mesons from multichannel interaction analysis below 1800 MeV
نویسندگان
چکیده
Scalar-isoscalar mesons are studied using an unitary model in three channels: ππ, KK and an effective 2π2π. All the solutions, fitted to the ππ and KK data, exhibit a wide f0(500), a narrow f0(980) and two relatively narrow resonances, lying on different sheets between 1300 MeV and 1500 MeV. These latter states are similar to the f0(1370) and f0(1500) seen in experiments at CERN. Branching ratios are compared with available data. We have started investigations of some crossing symmetry and chiral constraints imposed near the ππ threshold on the scalar-isoscalar, scalar-isotensor and P-wave ππ amplitudes.
منابع مشابه
ar X iv : h ep - p h / 99 09 40 2 v 1 1 6 Se p 19 99 1 Properties of scalar – isoscalar mesons from multichannel interaction analysis below 1800 MeV
Scalar-isoscalar mesons are studied using an unitary model in three channels: ππ, KK and an effective 2π2π. All the solutions, fitted to the ππ and KK data, exhibit a wide f0(500), a narrow f0(980) and two relatively narrow resonances, lying on different sheets between 1300 MeV and 1500 MeV. These latter states are similar to the f0(1370) and f0(1500) seen in experiments at CERN. Branching rati...
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Properties of scalar–isoscalar mesons in a mass range from ππ threshold up to 1800 MeV are analysed using an unitary model with separable interactions in three decay channels: ππ , KK and an effective 2π2π. Different solutions are obtained by fitting ππ and KK data. Analytical structure of the meson-meson multichannel amplitudes is studied with a special emphasis on the important role played by...
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