Four Quark Interpretation of Y(4260)

Details Four Quark Interpretation of Y(4260) Four Quark Interpretation of Y(4260)

2005-07-05

arxiv.org/abs/hep-ph/0507062v2

Phys.Rev.D72:031502,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 2 figures, RevTex, Revised discussion of the Y mass

Scientific paper

10.1103/PhysRevD.72.031502

We propose that the Y(4260) particle recently announced by BaBar is the first orbital excitation of a diquark-antidiquark state ([cs][cbar sbar]). 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 D_s D_sbar. The Y(4260) should also be seen in B non-leptonic 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.

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