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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2014, vol. 113, p. -

Observation of e+e- →π+π-π0χbJ and search for Xb →ω (1S) at s =10.867GeV

He X. H., Shen C. P., Yuan C. Z., Ban Y., Abdesselam A., Adachi I., Aihara H., Asner D. M., Aulchenko V., Aushev T., Ayad R., Bahinipati S., Bakich A. M., Bansal V., Bhuyan B., Bondar A., Bonvicini G., Bozek A., Bračko M., Browder T. E., Červenkov D., Chang P., Chekelian V., Chen A., Cheon B. G., Chilikin K., Chistov R., Cho K., Chobanova V., Choi S. K., Choi Y., Cinabro D., Dalseno J., Danilov M., DoleŽal Z., Drásal Z., Drutskoy A., Eidelman S., Farhat H., Fast J. E., Ferber T., Gaur V., Gabyshev N., Ganguly S., Garmash A., Gillard R., Glattauer R., Goh Y. M., Grzymkowska O., Haba J., Hayasaka K., Hayashii H., Hou W. S., Iijima T., Ishikawa A., Itoh R., Iwasaki Y., Jaegle I., Joo K. K., Julius T., Kato E., Kawasaki T., Kim D. Y., Kim M. J., Kim Y. J., Kinoshita K., Ko B. R., Kodyš P., Korpar S., KriŽan P., Krokovny P., Kumita T., Kuzmin A., Kwon Y. J., Lange J. S., Li Y., Libby J., Liventsev D., Matvienko D., Miyabayashi K., Miyata H., Mizuk R., Mohanty G. B., Moll A., Mussa R., Nakano E., Nakao M.

© 2014 American Physical Society. The e+e-→π+π-π0χbJ (J=0,1,2) processes are studied using a 118fb-1 data sample acquired with the Belle detector at a center-of-mass energy of 10.867 GeV. Unambiguous π+π-π0χbJ (J=1,2), ωχb1 signals are observed, and indication for ωχb2 is seen, both for the first time, and the corresponding cross section measurements are presented. No significant π+π-π0χb0 or ωχb0 signals are observed, and 90% confidence level upper limits on the cross sections for these two processes are obtained. In the π+π-π0 invariant mass spectrum, significant non-ω signals are also observed. We search for the X(3872)-like state (named Xb) decaying into ω?(1S); no significant signal is observed with a mass between 10.55 and 10.65GeV/c2.