Searches for exotic X,Y, and Z- states with BABAR

Abstract

Recently, several charmonium-like states above $D\bar{D}$ threshold have been discovered at the BELLE and BABAR $B$-factories. Some of these states are produced via Initial State Radiation ({\it e.g.} Y(4260) and Y(4350)) and some are observed in $B$ meson decays ({\it{e.g.}} X(3872), Y(3940)). The BELLE observation of the enhancement in the $\psi (2S){\pi }^{-}$, {\it {i.e.}} the $Z(4430{)}^{-}$ state, has generated a great deal of interest, because such a state must have minimum quark content ($c\bar{c}d\bar{u}$), so that it would represent the unequivocal manifestation of a four-quark meson state. Here we report recent BABAR results on the Y(4260), X(3872), Y(3940), and a search for the $Z(4430{)}^{-}$.

arXiv commentParallel talk at ICHEP08, Philadelphia, USA, July 29th - August 5th, 2008. Talk can be found at: http://www.hep.upenn.edu/ichep08/talks/misc/download_slides?Talk_id=411