We propose that the Y(4260) particle recently announced by BABAR is the first orbital excitation of a diquark-antidiquark state [cs][c* s*]. Using parameters recently determined to describe the X(3872) and X(3940) we show that the Y mass is compatible with the orbital excitation picture. A crucial prediction is that Y(4260) should decay predominantly in DsDs. The Y(4260) should also be seen in B nonleptonic decays in association with one kaon. We consider the full nonet of related four-quark states and their predicted properties. Finally, we comment on a possible narrow resonance in the same channel.
Four quark interpretation of Y(4260) / Maiani, Luciano; V., Riquer; F., Piccinini; Polosa, ANTONIO DAVIDE. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 72:(2005), pp. 031502-031504. [10.1103/PhysRevD.72.031502]
Four quark interpretation of Y(4260)
MAIANI, Luciano;POLOSA, ANTONIO DAVIDE
2005
Abstract
We propose that the Y(4260) particle recently announced by BABAR is the first orbital excitation of a diquark-antidiquark state [cs][c* s*]. Using parameters recently determined to describe the X(3872) and X(3940) we show that the Y mass is compatible with the orbital excitation picture. A crucial prediction is that Y(4260) should decay predominantly in DsDs. The Y(4260) should also be seen in B nonleptonic decays in association with one kaon. We consider the full nonet of related four-quark states and their predicted properties. Finally, we comment on a possible narrow resonance in the same channel.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
