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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2016, vol. 93, 11, p. -

Search for XYZ states in υ (1S) inclusive decays

Shen C. P., Yuan C. Z., Ban Y., Aihara H., Asner D. M., Badhrees I., Bakich A. M., Barberio E., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bondar A., Bonvicini G., Bozek A., Bračko M., Browder T. E., Červenkov D., 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., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Farhat H., Fast J. E., Ferber T., Fulsom B. G., Gaur V., Gabyshev N., Garmash A., Goldenzweig P., Haba J., Hayasaka K., Hayashii H., Hou W. S., Iijima T., Inguglia G., Ishikawa A., Itoh R., Jacobs W. W., Jeon H. B., Joo K. K., Julius T., Kang K. H., Kim D. Y., Kim J. B., Kim K. T., Kim S. H., Kim Y. J., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., KriŽan P., Krokovny P., Kuhr T., Kuzmin A., Kwon Y. J., Lange J. S., Li C. H., Li H., Li L., Li Y., Li Gioi L., Libby J., Liventsev D., Luo T., Masuda M., Matsuda T.

© 2016 American Physical Society.The branching fractions of the υ (1S) inclusive decays into final states with a J/ψ or a ψ(2S) are measured with improved precision to be B(υ (1S)→J/ψ+anything)=(5.25±0.13(stat)±0.25(syst))×10-4 and B(υ (1S)→ψ(2S)+anything)=(1.23±0.17(stat)±0.11(syst))×10-4. The first search for υ (1S) decays into XYZ states that decay into a J/ψ or a ψ(2S) plus one or two charged tracks yields no significant signals for XYZ states in any of the examined decay modes, and upper limits on their production rates in υ (1S) inclusive decays are determined.