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Evidence for B -> K eta 'gamma decays at Belle

Authors
Wedd, R.Adachi, I.Aihara, H.Arinstein, K.Aulchenko, V.Bakich, A. M.Balagura, V.Barberio, E.Bay, A.Belous, K.Bhardwaj, V.Bischofberger, M.Bondar, A.Bozek, A.Bracko, M.Browder, T. E.Chao, Y.Chen, A.Cheon, B. G.Cho, I. -S.Choi, Y.Dalseno, J.Dash, M.Drutskoy, A.Eidelman, S.Epifanov, D.Gabyshev, N.Goldenzweig, P.Ha, H.Horii, Y.Hoshi, Y.Hou, W. -S.Hyun, H. J.Iijima, T.Inami, K.Ishikawa, A.Itoh, R.Iwasaki, M.Kah, D. H.Katayama, N.Kawai, H.Kawasaki, T.Kim, H. O.Kim, J. H.Kim, Y. I.Kim, Y. J.Kinoshita, K.Ko, B. R.Krizan, P.Krokovny, P.Kuhr, T.Kumar, R.Kuzmin, A.Kwon, Y. -J.Kyeong, S. -H.Lee, M. J.Lee, S. -H.Lesiak, T.Li, J.Limosani, A.Liu, C.Liventsev, D.Louvot, R.Matyja, A.McOnie, S.Miyata, H.Mizuk, R.Mori, T.Nagasaka, Y.Nakao, M.Nakazawa, H.Natkaniec, Z.Nishida, S.Nitoh, O.Ohshima, T.Okuno, S.Ozaki, H.Pakhlov, P.Pakhlova, G.Park, C. W.Park, H. K.Park, K. S.Pestotnik, R.Piilonen, L. E.Poluektov, A.Sahoo, H.Sakai, Y.Schneider, O.Schuemann, J.Senyo, K.Sevior, M. E.Shapkin, M.Shebalin, V.Shiu, J. -G.Shwartz, B.Singh, J. B.Sokolov, A.Stanic, S.Staric, M.Sumisawa, K.Sumiyoshi, T.Suzuki, S.Taylor, G. N.Teramoto, Y.Trabelsi, K.Uehara, S.Unno, Y.Uno, S.Urquijo, P.Usov, Y.Varner, G.Varvell, K. E.Vervink, K.Vinokurova, A.Wang, C. H.Wang, M. -Z.Wang, P.Watanabe, Y.Wicht, J.Won, E.Yabsley, B. D.Yamamoto, H.Yamashita, Y.Zhang, Z. P.Zhilich, V.Zhulanov, V.Zivko, T.Zupanc, A.Zyukova, O.
Issue Date
28-6월-2010
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.81, no.11
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
81
Number
11
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/116213
DOI
10.1103/PhysRevD.81.111104
ISSN
1550-7998
Abstract
We present the results of a search for the radiative decay B -> K eta 'gamma and find evidence for B+ -> K+eta 'gamma decays at the 3.3 standard deviation level with a partial branching fraction of (3.6 +/- 1.2 +/- 0.4) x 10(-6), where the first error is statistical and the second systematic. This measurement is restricted to the region of combined K eta ' invariant mass less than 3.4 GeV/c(2). A 90% confidence level upper limit of 6.4 x 10(-6) is obtained for the partial branching fraction of the decay B-0 -> K-0 eta 'gamma in the same K eta ' invariant mass region. These results are obtained from a 605 fb(-1) data sample containing 657 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.
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