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Evidence of time-dependent CP violation in the decay B-0 -> D*+D*-

Authors
Vervink, K.Aushev, T.Schneider, O.Arinstein, K.Bakich, A. M.Balagura, V.Barberio, E.Bay, A.Bhardwaj, V.Bitenc, U.Bondar, A.Bozek, A.Bracko, M.Brodzicka, J.Browder, T. E.Chao, Y.Chen, A.Cheon, B. G.Chiang, C. -C.Chistov, R.Cho, I. -S.Choi, Y.Dalseno, J.Danilov, M.Dungel, W.Eidelman, S.Fratina, S.Gabyshev, N.Goldenzweig, P.Golob, B.Ha, H.Hara, T.Hayasaka, K.Hayashii, H.Hazumi, M.Heffernan, D.Hoshi, Y.Hou, W. -S.Hyun, H. J.Inami, K.Ishikawa, A.Ishino, H.Iwasaki, Y.Kah, D. H.Kang, J. H.Katayama, N.Kawai, H.Kawasaki, T.Kichimi, H.Kim, H. J.Kim, H. O.Kim, Y. I.Kim, Y. J.Kinoshita, K.Ko, B. R.Korpar, S.Krizan, P.Krokovny, P.Kuzmin, A.Kwon, Y. -J.Kyeong, S. -H.Lee, J. S.Lee, M. J.Li, J.Limosani, A.Liu, C.Liu, Y.Liventsev, D.Louvot, R.Matyja, A.McOnie, S.Miyabayashi, K.Miyata, H.Miyazaki, Y.Mizuk, R.Nakao, M.Nakazawa, H.Natkaniec, Z.Nishida, S.Nishimura, K.Nitoh, O.Ohshima, T.Okuno, S.Ozaki, H.Pakhlov, P.Pakhlova, G.Park, C. W.Park, H.Park, H. K.Pestotnik, R.Piilonen, L. E.Poluektov, A.Sahoo, H.Sakai, Y.Schuemann, J.Schwartz, A. J.Senyo, K.Sevior, M. E.Shapkin, M.Shen, C. P.Shiu, J. -G.Shwartz, B.Stanic, S.Stypula, J.Sumiyoshi, T.Tamura, N.Teramoto, Y.Trabelsi, K.Tsuboyama, T.Uehara, S.Uglov, T.Unno, Y.Uno, S.Varner, G.Wang, C. C.Wang, C. H.Wang, P.Watanabe, Y.Wicht, J.Won, E.Yabsley, B. D.Yamashita, Y.Zhang, Z. P.Zhilich, V.Zhulanov, V.Zivko, T.Zupanc, A.Zwahlen, N.
Issue Date
Dec-2009
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.80, no.11
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
80
Number
11
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/118872
DOI
10.1103/PhysRevD.80.111104
ISSN
1550-7998
Abstract
We report a measurement of the CP-odd fraction and the time-dependent CP violation in B-0 -> D*+D*- decays, using 657x10(6) BB events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure a CP-odd fraction of R-perpendicular to=0.125 +/- 0.043(stat)+/- 0.023(syst). From the distributions of the proper-time intervals between a B-0 -> D*+D*- decay and the other B meson in the event, we obtain evidence of CP violation with measured parameters A(D)(*+)D(*-)=0.15 +/- 0.13(stat)+/- 0.04(syst) and SD*+D*-=-0.96 +/- 0.25(stat)(-0.16)(+0.13)(syst).
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