New BES and Belle data show a peak in the Y(4260) decay into J/psi 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*(D) over bar* state should appear at about 4020 MeV.
J(PG)=1(++) charged resonance in the Upsilon(4260) -> pi(+) pi(-) J/psi decay? / Maiani, Luciano; V., Riquer; Faccini, Riccardo; F., Piccinini; Pilloni, Alessandro; Polosa, ANTONIO DAVIDE. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 87:(2013), p. 111102( R). [10.1103/PhysRevD.87.111102]
J(PG)=1(++) charged resonance in the Upsilon(4260) -> pi(+) pi(-) J/psi decay?
MAIANI, Luciano;FACCINI, Riccardo;PILLONI, ALESSANDRO;POLOSA, ANTONIO DAVIDE
2013
Abstract
New BES and Belle data show a peak in the Y(4260) decay into J/psi 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*(D) over bar* state should appear at about 4020 MeV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
