Evidence of time-dependent CP violation in the decay B0→D*+D *-

K. Vervink, T. Aushev, O. Schneider, K. Arinstein, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, C. C. Chiang, R. ChistovI. S. Cho, Y. Choi, J. Dalseno, M. Danilov, W. Dungel, S. Eidelman, S. Fratina, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lee, M. J. Lee, J. Li, A. Limosani, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, J. Schümann, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, S. Stanič, J. Stypula, T. Sumiyoshi, N. Tamura, Y. Teramoto, K. Trabelsi, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, C. C. Wang, C. H. Wang, P. Wang, Y. Watanabe, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, N. Zwahlen

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Abstract

We report a measurement of the CP-odd fraction and the time-dependent CP violation in B0→D*+D*- decays, using 657×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure a CP-odd fraction of R=0.125±0.043(stat)±0.023(syst). From the distributions of the proper-time intervals between a B0→D*+D*- decay and the other B meson in the event, we obtain evidence of CP violation with measured parameters AD*+D*-=0.15±0.13(stat)±0.04(syst) and SD*+D*-=-0.96±0.25(stat)-0.16+0.13(syst).

Original languageEnglish
Article number111104
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume80
Issue number11
DOIs
Publication statusPublished - Dec 14 2009

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

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., Bračko, M., Brodzicka, J., Browder, T. E., Chao, Y., Chen, A., Cheon, B. G., Chiang, C. C., ... Zwahlen, N. (2009). Evidence of time-dependent CP violation in the decay B0→D*+D *-. Physical Review D - Particles, Fields, Gravitation and Cosmology, 80(11), [111104]. https://doi.org/10.1103/PhysRevD.80.111104