Evidence for direct CP violation in the decay B-+/- -> D-(*()) K-+/-, D -> K-S(0)pi(+)pi(-) and measurement of the CKM phase phi(3)

  • Poluektov, A.
  • Bondar, A.
  • Yabsley, B. D.
  • Adachi, I.
  • Aihara, H.
  • ... Cheon, B. G.
  • 외 144명
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초록

We present a new measurement of the unitarity triangle angle phi(3) using a Dalitz plot analysis of the K-S(0)pi(+)pi(-) decay of the neutral D meson produced in B-+/- -> D-(*()) K-+/- decays. The method exploits the interference between D-0 and (D) over bar (0) to extract the angle phi(3), strong phase delta, and the ratio r of suppressed and allowed amplitudes. We apply this method to a 605 fb(-1) data sample collected by the Belle experiment. The analysis uses three decays: B-+/- -> DK +/-, and B-+/- -> D*K-+/- with D* -> D pi(0) and D* -> D gamma, as well as the corresponding charge-conjugate modes. From a combined maximum likelihood fit to the three modes, we obtain phi(3) = 78.4 degrees (+10.8 degrees)(-11.6 degrees) +/- 3.6 degrees (syst) +/- 8.9 degrees (model). CP conservation in this process is ruled out at the confidence level (1 - CL) = 5 X 10(-4), or 3.5 standard deviations.

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Evidence for direct CP violation in the decay B-+/- -> D-(*()) K-+/-, D -> K-S(0)pi(+)pi(-) and measurement of the CKM phase phi(3)
저자
Poluektov, A.Bondar, A.Yabsley, B. D.Adachi, I.Aihara, H.Arinstein, K.Aulchenko, V.Aushev, T.Bakich, A. M.Balagura, V.Barberio, E.Bay, A.Belous, K.Bischofberger, M.Bozek, A.Bracko, M.Browder, T. E.Chang, M. -C.Chang, P.Chen, A.Chen, K. -F.Chen, P.Cheon, B. G.Cho, I. -S.Choi, Y.Dalseno, J.Danilov, M.Dash, M.Drutskoy, A.Dungel, W.Eidelman, S.Epifanov, D.Gabyshev, N.Garmash, A.Goldenzweig, P.Golob, B.Ha, H.Haba, J.Hayashii, H.Horii, Y.Hoshi, Y.Hou, W. -S.Hsiung, Y. B.Hyun, H. J.Iijima, T.Inami, K.Iwabuchi, M.Iwasaki, M.Iwasaki, Y.Joshi, N. J.Julius, T.Kah, D. H.Kang, J. H.Kapusta, P.Katayama, N.Kawasaki, T.Kiesling, C.Kim, H. J.Kim, H. O.Kim, J. H.Kim, M. J.Kim, Y. J.Kinoshita, K.Ko, B. R.Kodys, P.Korpar, S.Krizan, P.Krokovny, P.Kuhr, T.Kumar, R.Kuzmin, A.Kwon, Y. -J.Kyeong, S. -H.Lange, J. S.Lee, M. J.Lee, S. -H.Li, J.Liu, C.Liventsev, D.Louvot, R.Matyja, A.McOnie, S.Miyabayashi, K.Miyata, H.Miyazaki, Y.Mizuk, R.Mohanty, G. B.Nakao, M.Natkaniec, Z.Neubauer, S.Nishida, S.Nishimura, K.Nitoh, O.Ogawa, S.Ohshima, T.Okuno, S.Olsen, S. L.Pakhlova, G.Park, H. K.Petric, M.Piilonen, L. E.Roehrken, M.Ryu, S.Sahoo, H.Sakai, Y.Schneider, O.Schwanda, C.Schwartz, A. J.Senyo, K.Sevior, M. E.Shapkin, M.Shebalin, V.Shen, C. P.Shiu, J. -G.Shwartz, B.Singh, J. B.Smerkol, P.Sokolov, A.Stanic, S.Staric, M.Sumisawa, K.Sumiyoshi, T.Suzuki, S.Tanaka, M.Trabelsi, K.Tsuboyama, T.Uehara, S.Uno, S.Usov, Y.Varner, G.Varvell, K. E.Vervink, K.Vinokurova, A.Wang, C. H.Wang, J.Wang, M. -Z.Wang, P.Wang, X. L.Watanabe, M.Watanabe, Y.Wedd, R.Won, E.Yamamoto, H.Yamashita, Y.Zhang, Z. P.Zhilich, V.Zhulanov, V.Zivko, T.Zupanc, A.Zyukova, O.
DOI
10.1103/PhysRevD.81.112002
발행일
2010-06
유형
Article
저널명
Physical Review D - Particles, Fields, Gravitation and Cosmology
81
11
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1 ~ 12