Evidence for the suppressed decay B^- -> DK^-, D -> K^+\pi^-\pi^0
Abstract
We report a study of the suppressed decay B^- -> DK^-, D -> K^+\pi^-\pi^0, where D denotes either a D^0 or a \bar{D}^0 meson. The decay is sensitive to the CP-violating parameter \phi_3. Using a data sample of 772 x 10^6 B\bar{B} pairs collected at the \Upsilon(4S) resonance with the Belle detector, we measure the ratio of branching fractions of the above suppressed decay to the favored decay B^- -> DK^-, D -> K^-\pi^+\pi^0. Our result is R_{DK} = [1.98 +/- 0.62(stat.) +/- 0.24(syst.)] x 10^{-2}, which indicates the first evidence of the signal for this suppressed decay with a significance of 3.2 standard deviations. We measure the direct CP asymmetry between the suppressed B^- and B^+ decays to be A_{DK} = 0.41 +/- 0.30 (stat.) +/- 0.05 (syst.). We also report measurements for the analogous quantities R_{D\pi} and A_{D\pi} for the decay B^- -> D\pi^-, D -> K^+\pi^-\pi^0.
Cite
@article{arxiv.1310.1741,
title = {Evidence for the suppressed decay B^- -> DK^-, D -> K^+\pi^-\pi^0},
author = {Belle Collaboration and M. Nayak and J. Libby and K. Trabelsi and I. Adachi and H. Aihara and D. M. Asner and T. Aushev and A. M. Bakich and A. Bala and P. Behera and K. Belous and V. Bhardwaj and G. Bonvicini and A. Bozek and M. Bračko and T. E. Browder and D. Červenkov and M. -C. Chang and P. Chang and V. Chekelian and A. Chen and B. G. Cheon and R. Chistov and I. -S. Cho and K. Cho and V. Chobanova and Y. Choi and D. Cinabro and J. Dalseno and M. Danilov and Z. Doležal and Z. Drásal and D. Dutta and S. Eidelman and S. Esen and H. Farhat and J. E. Fast and T. Ferber and V. Gaur and N. Gabyshev and S. Ganguly and R. Gillard and Y. M. Goh and B. Golob and J. Haba and H. Hayashii and Y. Horii and Y. Hoshi and W. -S. Hou and H. J. Hyun and T. Iijima and A. Ishikawa and T. Iwashita and I. Jaegle and T. Julius and D. H. Kah and E. Kato and D. Y. Kim and H. J. Kim and J. B. Kim and M. J. Kim and Y. J. Kim and K. Kinoshita and J. Klucar and B. R. Ko and P. Kodyš and S. Korpar and P. Krishnan and P. Križan and P. Krokovny and T. Kuhr and T. Kumita and A. Kuzmin and Y. -J. Kwon and S. -H. Lee and J. Li and Y. Li and L. Li Gioi and Y. Liu and D. Liventsev and P. Lukin and H. Miyake and R. Mizuk and G. B. Mohanty and A. Moll and T. Mori and N. Muramatsu and R. Mussa and Y. Nagasaka and M. Nakao and E. Nedelkovska and K. Negishi and C. Ng and N. K. Nisar and O. Nitoh and S. Ogawa and S. Okuno and Y. Onuki and P. Pakhlov and G. Pakhlova and C. W. Park and H. Park and T. K. Pedlar and M. Petrič and L. E. Piilonen and M. Ritter and M. Röhrken and A. Rostomyan and H. Sahoo and T. Saito and Y. Sakai and S. Sandilya and L. Santelj and T. Sanuki and V. Savinov and O. Schneider and G. Schnell and C. Schwanda and A. J. Schwartz and K. Senyo and O. Seon and M. E. Sevior and M. Shapkin and C. P. Shen and T. -A. Shibata and J. -G. Shiu and B. Shwartz and A. Sibidanov and F. Simon and Y. -S. Sohn and A. Sokolov and E. Solovieva and M. Starič and M. Steder and Z. Suzuki and U. Tamponi and G. Tatishvili and Y. Teramoto and M. Uchida and T. Uglov and Y. Unno and S. Uno and P. Urquijo and S. E. Vahsen and C. Van Hulse and P. Vanhoefer and G. Varner and K. E. Varvell and M. N. Wagner and C. H. Wang and M. -Z. Wang and Y. Watanabe and K. M. Williams and E. Won and Y. Yamashita and S. Yashchenko and Y. Yusa and V. Zhilich and V. Zhulanov and A. Zupanc},
journal= {arXiv preprint arXiv:1310.1741},
year = {2019}
}
Comments
7 pages, 3 figures, Accepted by Phys. Rev. D (Rapid Communications)