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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2016, vol. 93, 1, p. -

Measurements of the (10860) and (11020) resonances via σ (e+e- → (nS)π+π-)

Santel D., Kinoshita K., Chang P., Abdesselam A., Adachi I., Aihara H., Al Said S., Arinstein K., Asner D. M., Aushev T., Ayad R., Bakich A. M., Bansal V., Bhuyan B., Bobrov A., Bondar A., Bonvicini G., Bračko M., Browder T. E., Červenkov D., Chekelian V., Cheon B. G., Chilikin K., Cho K., Chobanova V., Choi S. K., Choi Y., Cinabro D., Dalseno J., Danilov M., Dingfelder J., DoleŽal Z., Drásal Z., Drutskoy A., Eidelman S., Farhat H., Fast J. E., Ferber T., Gaur V., Gabyshev N., Garmash A., Getzkow D., Gillard R., Goh Y. M., Haba J., Hara T., Hayasaka K., Hayashii H., He X. H., Hou W. S., Hyun H. J., Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki Y., Jaegle I., Joffe D., Julius T., Kang K. H., Kato E., Kawasaki T., Kiesling C., Kim D. Y., Kim H. J., Kim J. B., Kim J. H., Kim M. J., Kim S. H., Kim Y. J., Ko B. R., Kodyš P., Korpar S., KriŽan P., Krokovny P., Kuzmin A., Lange J. S., Lee I. S., Li Y., Li Gioi L., Libby J., Liventsev D., Lukin P., Matvienko D., Miyabayashi K., Miyata H., Mizuk R.

© 2016 American Physical Society.We report new measurements of the total cross sections for e+e-→(nS)π+π- (n=1, 2, 3) and e+e-→bb¯ from a high-luminosity fine scan of the region s=10.63-11.05 GeV with the Belle detector. We observe that the (nS)π+π- spectra have little or no nonresonant component and extract from them the masses and widths of (10860) and (11020) and their relative phase. We find M10860=(10891.1±3.2-1.7+0.6) MeV/c2 and Γ10860=(53.7-5.6 -5.4+7.1 +1.3) MeV and report first measurements M11020=(10987.5-2.5 -2.1+6.4 +9.0) MeV/c2, Γ11020=(61-19 -20+9 +2) MeV, and φ11020-φ10860=(-1.0±0.4-0.1+1.4) rad.