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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2014, vol. 89, p. -

Updated cross section measurement of e+e- →k+K-J /ψ and KS0 KS0 J /ψ via initial state radiation at Belle

Shen C. P., Yuan C. Z., Wang P., Abdesselam A., Adachi I., Aihara H., Al Said S., Asner D. M., Aulchenko V., Aushev T., Ayad R., Bakich A. M., Bala A., Bobrov A., Bonvicini G., Bozek A., Bračko M., Browder T. E., 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., Drutskoy A., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J. E., Ferber T., Frey A., Gaur V., Ganguly S., Gillard R., Glattauer R., Goh Y. M., Golob B., Haba J., Hayasaka K., Hayashii H., He X. H., Hoshi Y., Hou W. S., Hsiung Y. B., Hyun H. J., Iijima T., Ishikawa A., Itoh R., Iwasaki Y., Joffe D., Julius T., Kang J. H., Kato E., Kawasaki T., Kiesling C., Kim D. Y., Kim H. J., Kim J. B., Kim J. H., Kim K. T., Kim M. J., Kim Y. J., Kinoshita K., Ko B. R., Kodyš P., Korpar S., KriŽan P., Krokovny P., Kuzmin A., Kwon Y. J., Lee S. H., Li J., Li Gioi L., Libby J., Liu C., Liu Z. Q., Lukin P., Matvienko D., Miyabayashi K., Miyata H., Mizuk R., Moll A.

The cross sections of the processes e+e-→K+K-J/ψ and KS0KS0J/ψ are measured via initial state radiation at center-of-mass energies between the threshold and 6.0 GeV using a data sample of 980fb-1 collected with the Belle detector on or near the Υ(nS) resonances, where n=1,2,...,5. The cross sections for e+e-→K+K-J/ψ are at a few pb level and the average cross section for e+e-→KS0KS0J/ψ is 1.8±0.6(stat)±0.3(syst)pb between 4.4 and 5.2 GeV. All of them are consistent with previously published results with improved precision. A search for resonant structures and associated intermediate states in the cross section of the process e+e-→K+K-J/ψ is performed. © 2014 American Physical Society.