B decays as spectroscope for charmed four-quark states
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Journal Volume
27
Journal Issue
4
Pages
193-200
Date Issued
2003
Author(s)
Cheng, H.-Y.
Abstract
The Ds(2320) state recently observed by BaBar in the Ds+�k0 channel may be the first of a host of cqq?q? four-quark states. We give a phenomenological account of the masses and decay modes. The isosinglet Ds(2320) state is the only narrow one, dominated by the observed isospin violating decay and less than �� 100 keV in width. All other states are expected to decay hadronically. Notable resonances are in doubly charged Ds+�k+, D+K+, wrong pairing D+K?, and also Ds+K?, D�b channels. We propose B decays as searching ground for such 4-quark states, which recoil against D?(?) meson from B decay, or �k+ D?(?), K? mesons from B? decay. Exotic qcc?q? charmonia could also be produced, and may be behind the slow J/�r bump in inclusive B��J/�r+X decay.
Type
journal article