Search for an X(3872) charged partner in the decay mode X- ->J/psi pi- pi0 in the B meson decays B0 -> X- K+ and B- -> X- Ks

Abstract

We report on the search for a charged partner of the X(3872) in the decay $B\to X^{\pm }K$, $X^{\pm }\to J/\psi {\pi }^{\pm }{\pi }^0$, using 213 million $B\bar{B}$ events collected at the ${\rm Y}(4S)$ resonance with the BaBar detector at the PEP-II $e^{+}{e}^{-}$ asymmetric-energy storage ring. The resulting product branching fraction upper limits are $BR({\bar{B}}^0/B^0\to X^{\pm }{K}^{\mp }$, $X^{\pm }\to J/\psi {\pi }^{\pm }{\pi }^0)$ $<5.8\times 10^{-6}$ and $BR(B^{\pm }\to X^{\pm }{K}_S^0$, $X^{\pm }\to J/\psi {\pi }^{\pm }{\pi }^0)$ $<11\times 10^{-6}$ at the 90% confidence level. All results are preliminary.

19, 7 postscript figues, submitted to ICHEP2004