Observation of ϒ ( 2 S ) → γ η b ( 1 S ) Decay

We report the observation of Υ(2S) → γηb(1S) decay based on analysis of the inclusive photon spectrum of 24.7 fb-1 of e+e- collisions at the Υ(2S) center-of-mass energy collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure a branching fraction of B(Υ(2S) → γηb (1S...

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Published in:	Physical review letters 2018-12, Vol.121 (23), Article 232001
Main Authors:	Fulsom, B. G., Pedlar, T. K., Adachi, I., Asner, D. M., Atmacan, H., Aulchenko, V., Ayad, R., Bansal, V., Behera, P., Bhardwaj, V., Bhuyan, B., Bondar, A., Bozek, A., Bračko, M., Červenkov, D., Choi, Y., Choudhury, S., Cunliffe, S., Di Carlo, S., Dingfelder, J., Doležal, Z., Drásal, Z., Eidelman, S., Epifanov, D., Ferber, T., Garg, R., Gaur, V., Gabyshev, N., Guido, E., Hayasaka, K., Hou, W.-S., Inami, K., Iwasaki, M., Iwasaki, Y., Jeon, H. B., Kichimi, H., Kiesling, C., Kim, H. J., Kim, K. T., Kim, S. H., Kinoshita, K., Kotchetkov, D., Križan, P., Kuzmin, A., Lange, J. S., Lee, I. S., Li, L. K., Li, Y. B., Libby, J., Liventsev, D., Lubej, M., Luo, T., Matsuda, T., Matvienko, D., Miyabayashi, K., Mussa, R., Nakao, M., Nayak, M., Nisar, N. K., Okuno, S., Pakhlov, P., Pal, B., Pardi, S., Park, H., Prencipe, E., Sandilya, S., Santelj, L., Savinov, V., Schneider, O., Schwanda, C., Seino, Y., Senyo, K., Shebalin, V., Shiu, J.-G., Shwartz, B., Simon, F., Singh, J. B., Sokolov, A., Sumihama, M., Sumisawa, K., Sutcliffe, W., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Vahsen, S. E., Van Hulse, C., Van Tonder, R., Varner, G., Vossen, A., Wang, P., Wang, X. L., Watanabe, M., Widmann, E., Won, E., Ye, H., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V.
Format:	Article
Language:	English
Subjects:	PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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