Search for Bottom Counterparts of X(3872) and Y(4260) via ${\pi }^{+}{\pi }^{-}{\rm Y}$

Abstract

The X(3872) and Y(4260), both discovered in ${\pi }^{+}{\pi }^{-}J/\psi$ mode, are rather unusual: $X_c\equiv X(3872)$ is very narrow, while $Y_c\equiv Y(4260)$ has large $Y_c\to {\pi }^{+}{\pi }^{-}J/\psi$ width. Many models for their composition have been suggested, but perhaps discovering their bottom counterparts could shed much light on the issue. The narrow state, $X_b$ may be searched for at the Tevatron via $p\bar{p}\to {\pi }^{+}{\pi }^{-}{\rm Y}+X$, with the LHC much more promising. The state $Y_b$ can be searched for at B factories via radiative return $e^{+}{e}^{-}\to {\gamma }_{\mathrm{ISR}}+{\pi }^{+}{\pi }^{-}{\rm Y}$ on ${\rm Y}(5S)$, or by $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{\rm Y}$ direct scan.

Comments: 4 pages, no figures, presented at ICHEP 2006