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Production of new charmonium-like states in e+e -→J/Ψ D(-*)D(-*) at √s ≈ 10.6GeV

Adachi I., Aihara H., Arinstein K., Aushev T., Aziz T., Bakich A. M., Balagura V., Barberio E., Bedny I., Belous K., Bhardwaj V., Bitenc U., Bondar A., Bozek A., Bracko M., Browder T. E., Chao Y., Chen A., Chen K. F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Golob B., Ha H., Hayasaka K., Hazumi M., Heffernan D., Hoshi Y., Hou W. S., Hsiung Y. B., Hyun H. J., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kah D. H., Kang J. H., Kapusta P., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim Y. J., Kinoshita K., Korpar S., Krizan P., Krokovny P., Kumar R., Kuo C. C., Kwon Y. J., Lange J. S., Lee M. J., Lee S. E., Lesiak T., Limosani A., Lin S. W., Liu Y., Liventsev D., Mandl F., Matyja A., Medvedeva T., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park C. W., Peak L. S., Pestotnik R., Piilonen L. E.

We present a study of the X(3940) state in the process e+e - → J/ Ψ D*)D. The X(3940) mass and width are measured to be (3942 +7-6±6)MeV/c2 and F = (37 +26 -15 ±8)MeV. In the process e+e- → J/ Ψ D*) +D*)- we have observed another charmonium-like state, which we denote as X(4160), in the spectrum of invariant masses of D*) +D*)- combinations. The X(4160) parameters are M =(4156 +25-20±15)MeV/c2 and F = (139 +111- 61±21)MeV. The analysis is based on a data sample with an integrated luminosity of 693 fb-1 recorded near the γ(4S) resonance with the Belle detector at the KEKB e +e- asymmetric-energy collider.