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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2004, vol. 71, p. 031501-1

Search for a charged partner of the X(3872) in the B meson decay B → X<sup>-</sup>K, X<sup>-</sup> → J/ψπ<sup>-</sup>π<sup>0</sup>

Aubert B., Barate R., Boutigny D., Couderc F., Karyotakis Y., Lees J. P., Poireau V., Tisserand V., Zghiche A., Grauges-Pous E., Palano A., Pompili A., Chen J. C., Qi N. D., Rong G., Wang P., Zhu Y. S., Eigen G., Ofte I., Stugu B., Abrams G. S., Borgland A. W., Breon A. B., Brown D. N., Button-Shafer J., Cahn R. N., Charles E., Day C. T., Gill M. S., Gritsan A. V., Groysman Y., Jacobsen R. G., Kadel R. W., Kadyk J., Kerth L. T., Kolomensky Yu G., Kukartsev G., Lynch G., Mir L. M., Oddone P. J., Orimoto T. J., Pripstein M., Roe N. A., Ronan M. T., Wenzel W. A., Barrett M., Ford K. E., Harrison T. J., Hart A. J., Hawkes C. M., Morgan S. E., Watson A. T., Fritsch M., Goetzen K., Held T., Koch H., Lewandowski B., Pelizaeus M., Schroeder T., Steinke M., Boyd J. T., Chevalier N., Cottingham W. N., Kelly M. P., Latham T. E., Wilson F. F., Cuhadar-Donszelmann T., Hearty C., Knecht N. S., Mattison T. S., McKenna J. A., Thiessen D., Khan A., Kyberd P., Teodorescu L., Blinov A. E., Blinov V. E., Druzhinin V. P., Golubev V. B., Ivanchenko V. N., Kravchenko E. A., Onuchin A. P., Serednyakov S. I., Skovpen Yu I., Solodov E. P., Yushkov A. N., Best D., Bruinsma M., Chao M., Eschrich I., Kirkby D., Lankford A. J., Mandelkern M., Mommsen R. K., Roethel W., Stoker D. P., Buchanan C., Hartfiel B. L., Weinstein A. J R, Foulkes S. D.

We search for a charged partner of the X(3872) in the decay B → X <sup>-</sup> K, X<sup>-</sup> → J/ψπ<sup>-</sup>π<sup>0</sup>, using 234 × 10<sup>6</sup> BB events collected at the Y(4S) resonance with the BABAR detector at the PEP-II e<sup>+</sup>e<sup>-</sup> asymmetric-energy storage ring. The resulting product branching fraction upper limits are B(B <sup>0</sup> → X<sup>-</sup> K<sup>+</sup>, X<sup>-</sup> → J/ψπ<sup>-</sup>π<sup>0</sup>) < 5.4 × 10<sup>-6</sup> and B(B<sup>-</sup> → X<sup>-</sup>K̄<sup>0</sup>, X<sup>-</sup> → J/ψπ<sup>-</sup>π<sup>0</sup>) < 22 × 10<sup>-6</sup> at the 90% confidence level. © 2005 The American Physical Society.