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rho rho interaction in the hidden gauge formalism and the f(0)(1370) and f(2)(1270) resonances

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rho rho interaction in the hidden gauge formalism and the f(0)(1370) and f(2)(1270) resonances

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Molina Peralta, Raquel; Nicmorus, Diana; Oset Báguena, Eulogio

Aquest document és un/a article, creat/da en: 2008

We have studied the interaction of vectors mesons within the hidden gauge formalism and applied it to the particular case of the ρρ interaction. We find a strong attraction in the isospin, spin channels I,S=0,0 and 0,2, which is enough to bind the ρρ system. We also find that the attraction in the I,S=0,2 channel is much stronger than in the 0,0 case. The states develop a width when the ρ mass distribution is considered, and particularly when the ππ decay channel is turned on. Using a regularization scheme with cut offs of natural size, we obtain results in fair agreement with the mass and the width of the f0(1370) and f2(1270) meson states, providing a natural explanation of why the tensor state is more bound than the scalar and offering a new picture for these states, which would be dynamically generated from the ρρ interaction or, in simpler words, ρρ molecular states.

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