New BES and Belle data show a peak in the Y(4260) decay into J/ψ plus one charged pion. We point out that the peak might correspond to a charged resonance at about 3880 MeV predicted some time ago within a tetraquark model. The same tetraquark model predicts another peak at about 100 MeV below the observed one. We discuss the possibility of having it in present data. On the other hand we expect that if the molecular picture were the correct one, a peak corresponding to a D*D̄* state should appear at about 4020 MeV. © 2013 American Physical Society.
JPG=1++ charged resonance in the Y(4260) →π+π-J/ψ decay?
Pilloni A.;
2013-01-01
Abstract
New BES and Belle data show a peak in the Y(4260) decay into J/ψ plus one charged pion. We point out that the peak might correspond to a charged resonance at about 3880 MeV predicted some time ago within a tetraquark model. The same tetraquark model predicts another peak at about 100 MeV below the observed one. We discuss the possibility of having it in present data. On the other hand we expect that if the molecular picture were the correct one, a peak corresponding to a D*D̄* state should appear at about 4020 MeV. © 2013 American Physical Society.File in questo prodotto:
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