The authors search for a charged partner of the X(3872) in the decay B → X−K, X− → J/??−?°, using 234 million B{bar B} events collected at the?(4S) resonance with the BABAR detector at the PEP-II ee− asymmetric-energy storage ring. The resulting product branching fraction upper limits are?(B° → X−K+, X− → J/??−?°)

The authors have performed a search for a charged partner of the X(3872) decaying to J/[psi][pi]{sup {+-}}[pi]°. The results set upper limits on the product branching fractions of B({bar B}°/B° --> X{sup {+-}}K{sup {-+}}, X{sup {+-}} --> J/[psi]{sup {+-}}[pi]°) 5.2 x 10−6 and B(B{sup {+-}}) -- X{sup {+-}}K°{sub s}, X{sup {+-}} --> J/[psi]{sup {+-}}[pi]°