Evidence for the suppressed decay B-→DK-, D→K+ π-π0

M. Nayak, J. Libby, K. Trabelsi, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, A. Bala, P. Behera, K. Belous, V. Bhardwaj, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian & 140 others A. Chen, B. G. Cheon, R. Chistov, I. S. Cho, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, D. Dutta, S. Eidelman, S. Esen, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, T. Iwashita, I. Jaegle, T. Julius, D. H. Kah, E. Kato, D. Y. Kim, H. J. Kim, J. B. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, P. Krishnan, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, S. H. Lee, J. Li, Y. Li, L. Li Gioi, Y. Liu, D. Liventsev, P. Lukin, H. Miyake, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, R. Mussa, Y. Nagasaka, M. Nakao, E. Nedelkovska, K. Negishi, C. Ng, N. K. Nisar, O. Nitoh, S. Ogawa, S. Okuno, Y. Onuki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, M. Petrič, L. E. Piilonen, M. Ritter, M. Röhrken, A. Rostomyan, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. A. Shibata, J. G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. S. Sohn, A. Sokolov, E. Solovieva, M. Starič, M. Steder, Z. Suzuki, U. Tamponi, G. Tatishvili, Y. Teramoto, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, M. N. Wagner, C. H. Wang, M. Z. Wang, Y. Watanabe, K. M. Williams, Eunil Won, Y. Yamashita, S. Yashchenko, Y. Yusa, V. Zhilich, V. Zhulanov, A. Zupanc

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We report a study of the suppressed decay B-→DK -, D→K+π-π0, where D denotes either a D0 or a D̄0 meson. The decay is sensitive to the CP -violating parameter 3. Using a data sample of 772×106 BB̄ pairs collected at the Υ(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-π+π0. Our result is RDK=[1.98±0.62(stat)±0.24(syst)] ×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 ADK=0.41±0.30(stat)±0.05(syst). We also report measurements for the analogous quantities R and A for the decay B-→Dπ-, D→K+π-π0.

Original languageEnglish
Article number091104
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume88
Issue number9
DOIs
Publication statusPublished - 2013 Nov 14

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decay
standard deviation
mesons
asymmetry
detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Nayak, M., Libby, J., Trabelsi, K., Adachi, I., Aihara, H., Asner, D. M., ... Zupanc, A. (2013). Evidence for the suppressed decay B-→DK-, D→K+ π-π0. Physical Review D - Particles, Fields, Gravitation and Cosmology, 88(9), [091104]. https://doi.org/10.1103/PhysRevD.88.091104

Evidence for the suppressed decay B-→DK-, D→K+ π-π0. / Nayak, M.; Libby, J.; Trabelsi, K.; Adachi, I.; Aihara, H.; Asner, D. M.; Aushev, T.; Bakich, A. M.; Bala, A.; Behera, P.; Belous, K.; Bhardwaj, V.; Bonvicini, G.; Bozek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chang, M. C.; Chang, P.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chistov, R.; Cho, I. S.; Cho, K.; Chobanova, V.; Choi, Y.; Cinabro, D.; Dalseno, J.; Danilov, M.; Doležal, Z.; Drásal, Z.; Dutta, D.; Eidelman, S.; Esen, S.; Farhat, H.; Fast, J. E.; Ferber, T.; Gaur, V.; Gabyshev, N.; Ganguly, S.; Gillard, R.; Goh, Y. M.; Golob, B.; Haba, J.; Hayashii, H.; Horii, Y.; Hoshi, Y.; Hou, W. S.; Hyun, H. J.; Iijima, T.; Ishikawa, A.; Iwashita, T.; Jaegle, I.; Julius, T.; Kah, D. H.; Kato, E.; Kim, D. Y.; Kim, H. J.; Kim, J. B.; Kim, M. J.; Kim, Y. J.; Kinoshita, K.; Klucar, J.; Ko, B. R.; Kodyš, P.; Korpar, S.; Krishnan, P.; Križan, P.; Krokovny, P.; Kuhr, T.; Kumita, T.; Kuzmin, A.; Kwon, Y. J.; Lee, S. H.; Li, J.; Li, Y.; Li Gioi, L.; Liu, Y.; Liventsev, D.; Lukin, P.; Miyake, H.; Mizuk, R.; Mohanty, G. B.; Moll, A.; Mori, T.; Muramatsu, N.; Mussa, R.; Nagasaka, Y.; Nakao, M.; Nedelkovska, E.; Negishi, K.; Ng, C.; Nisar, N. K.; Nitoh, O.; Ogawa, S.; Okuno, S.; Onuki, Y.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H.; Pedlar, T. K.; Petrič, M.; Piilonen, L. E.; Ritter, M.; Röhrken, M.; Rostomyan, A.; Sahoo, H.; Saito, T.; Sakai, Y.; Sandilya, S.; Santelj, L.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Schwartz, A. J.; Senyo, K.; Seon, O.; Sevior, M. E.; Shapkin, M.; Shen, C. P.; Shibata, T. A.; Shiu, J. G.; Shwartz, B.; Sibidanov, A.; Simon, F.; Sohn, Y. S.; Sokolov, A.; Solovieva, E.; Starič, M.; Steder, M.; Suzuki, Z.; Tamponi, U.; Tatishvili, G.; Teramoto, Y.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Vahsen, S. E.; Van Hulse, C.; Vanhoefer, P.; Varner, G.; Varvell, K. E.; Wagner, M. N.; Wang, C. H.; Wang, M. Z.; Watanabe, Y.; Williams, K. M.; Won, Eunil; Yamashita, Y.; Yashchenko, S.; Yusa, Y.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 88, No. 9, 091104, 14.11.2013.

Research output: Contribution to journalArticle

Nayak, M, Libby, J, Trabelsi, K, Adachi, I, Aihara, H, Asner, DM, Aushev, T, Bakich, AM, Bala, A, Behera, P, Belous, K, Bhardwaj, V, Bonvicini, G, Bozek, A, Bračko, M, Browder, TE, Červenkov, D, Chang, MC, Chang, P, Chekelian, V, Chen, A, Cheon, BG, Chistov, R, Cho, IS, Cho, K, Chobanova, V, Choi, Y, Cinabro, D, Dalseno, J, Danilov, M, Doležal, Z, Drásal, Z, Dutta, D, Eidelman, S, Esen, S, Farhat, H, Fast, JE, Ferber, T, Gaur, V, Gabyshev, N, Ganguly, S, Gillard, R, Goh, YM, Golob, B, Haba, J, Hayashii, H, Horii, Y, Hoshi, Y, Hou, WS, Hyun, HJ, Iijima, T, Ishikawa, A, Iwashita, T, Jaegle, I, Julius, T, Kah, DH, Kato, E, Kim, DY, Kim, HJ, Kim, JB, Kim, MJ, Kim, YJ, Kinoshita, K, Klucar, J, Ko, BR, Kodyš, P, Korpar, S, Krishnan, P, Križan, P, Krokovny, P, Kuhr, T, Kumita, T, Kuzmin, A, Kwon, YJ, Lee, SH, Li, J, Li, Y, Li Gioi, L, Liu, Y, Liventsev, D, Lukin, P, Miyake, H, Mizuk, R, Mohanty, GB, Moll, A, Mori, T, Muramatsu, N, Mussa, R, Nagasaka, Y, Nakao, M, Nedelkovska, E, Negishi, K, Ng, C, Nisar, NK, Nitoh, O, Ogawa, S, Okuno, S, Onuki, Y, Pakhlov, P, Pakhlova, G, Park, CW, Park, H, Pedlar, TK, Petrič, M, Piilonen, LE, Ritter, M, Röhrken, M, Rostomyan, A, Sahoo, H, Saito, T, Sakai, Y, Sandilya, S, Santelj, L, Sanuki, T, Savinov, V, Schneider, O, Schnell, G, Schwanda, C, Schwartz, AJ, Senyo, K, Seon, O, Sevior, ME, Shapkin, M, Shen, CP, Shibata, TA, Shiu, JG, Shwartz, B, Sibidanov, A, Simon, F, Sohn, YS, Sokolov, A, Solovieva, E, Starič, M, Steder, M, Suzuki, Z, Tamponi, U, Tatishvili, G, Teramoto, Y, Uchida, M, Uglov, T, Unno, Y, Uno, S, Urquijo, P, Vahsen, SE, Van Hulse, C, Vanhoefer, P, Varner, G, Varvell, KE, Wagner, MN, Wang, CH, Wang, MZ, Watanabe, Y, Williams, KM, Won, E, Yamashita, Y, Yashchenko, S, Yusa, Y, Zhilich, V, Zhulanov, V & Zupanc, A 2013, 'Evidence for the suppressed decay B-→DK-, D→K+ π-π0', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 88, no. 9, 091104. https://doi.org/10.1103/PhysRevD.88.091104
Nayak, M. ; Libby, J. ; Trabelsi, K. ; Adachi, I. ; Aihara, H. ; Asner, D. M. ; Aushev, T. ; Bakich, A. M. ; Bala, A. ; Behera, P. ; Belous, K. ; Bhardwaj, V. ; Bonvicini, G. ; Bozek, A. ; Bračko, M. ; Browder, T. E. ; Červenkov, D. ; Chang, M. C. ; Chang, P. ; Chekelian, V. ; Chen, A. ; Cheon, B. G. ; Chistov, R. ; Cho, I. S. ; Cho, K. ; Chobanova, V. ; Choi, Y. ; Cinabro, D. ; Dalseno, J. ; Danilov, M. ; Doležal, Z. ; Drásal, Z. ; Dutta, D. ; Eidelman, S. ; Esen, S. ; Farhat, H. ; Fast, J. E. ; Ferber, T. ; Gaur, V. ; Gabyshev, N. ; Ganguly, S. ; Gillard, R. ; Goh, Y. M. ; Golob, B. ; Haba, J. ; Hayashii, H. ; Horii, Y. ; Hoshi, Y. ; Hou, W. S. ; Hyun, H. J. ; Iijima, T. ; Ishikawa, A. ; Iwashita, T. ; Jaegle, I. ; Julius, T. ; Kah, D. H. ; Kato, E. ; Kim, D. Y. ; Kim, H. J. ; Kim, J. B. ; Kim, M. J. ; Kim, Y. J. ; Kinoshita, K. ; Klucar, J. ; Ko, B. R. ; Kodyš, P. ; Korpar, S. ; Krishnan, P. ; Križan, P. ; Krokovny, P. ; Kuhr, T. ; Kumita, T. ; Kuzmin, A. ; Kwon, Y. J. ; Lee, S. H. ; Li, J. ; Li, Y. ; Li Gioi, L. ; Liu, Y. ; Liventsev, D. ; Lukin, P. ; Miyake, H. ; Mizuk, R. ; Mohanty, G. B. ; Moll, A. ; Mori, T. ; Muramatsu, N. ; Mussa, R. ; Nagasaka, Y. ; Nakao, M. ; Nedelkovska, E. ; Negishi, K. ; Ng, C. ; Nisar, N. K. ; Nitoh, O. ; Ogawa, S. ; Okuno, S. ; Onuki, Y. ; Pakhlov, P. ; Pakhlova, G. ; Park, C. W. ; Park, H. ; Pedlar, T. K. ; Petrič, M. ; Piilonen, L. E. ; Ritter, M. ; Röhrken, M. ; Rostomyan, A. ; Sahoo, H. ; Saito, T. ; Sakai, Y. ; Sandilya, S. ; Santelj, L. ; Sanuki, T. ; Savinov, V. ; Schneider, O. ; Schnell, G. ; Schwanda, C. ; Schwartz, A. J. ; Senyo, K. ; Seon, O. ; Sevior, M. E. ; Shapkin, M. ; Shen, C. P. ; Shibata, T. A. ; Shiu, J. G. ; Shwartz, B. ; Sibidanov, A. ; Simon, F. ; Sohn, Y. S. ; Sokolov, A. ; Solovieva, E. ; Starič, M. ; Steder, M. ; Suzuki, Z. ; Tamponi, U. ; Tatishvili, G. ; Teramoto, Y. ; Uchida, M. ; Uglov, T. ; Unno, Y. ; Uno, S. ; Urquijo, P. ; Vahsen, S. E. ; Van Hulse, C. ; Vanhoefer, P. ; Varner, G. ; Varvell, K. E. ; Wagner, M. N. ; Wang, C. H. ; Wang, M. Z. ; Watanabe, Y. ; Williams, K. M. ; Won, Eunil ; Yamashita, Y. ; Yashchenko, S. ; Yusa, Y. ; Zhilich, V. ; Zhulanov, V. ; Zupanc, A. / Evidence for the suppressed decay B-→DK-, D→K+ π-π0. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2013 ; Vol. 88, No. 9.
@article{7872c3b988af4f369a60d7b5dfaf4035,
title = "Evidence for the suppressed decay B-→DK-, D→K+ π-π0",
abstract = "We report a study of the suppressed decay B-→DK -, D→K+π-π0, where D denotes either a D0 or a D̄0 meson. The decay is sensitive to the CP -violating parameter 3. Using a data sample of 772×106 BB̄ pairs collected at the Υ(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-π+π0. Our result is RDK=[1.98±0.62(stat)±0.24(syst)] ×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 ADK=0.41±0.30(stat)±0.05(syst). We also report measurements for the analogous quantities RDπ and A Dπ for the decay B-→Dπ-, D→K+π-π0.",
author = "M. Nayak and J. Libby and K. Trabelsi and I. Adachi and H. Aihara and Asner, {D. M.} and T. Aushev and Bakich, {A. M.} and A. Bala and P. Behera and K. Belous and V. Bhardwaj and G. Bonvicini and A. Bozek and M. Bračko and Browder, {T. E.} and D. Červenkov and Chang, {M. C.} and P. Chang and V. Chekelian and A. Chen and Cheon, {B. G.} and R. Chistov and Cho, {I. S.} and K. Cho and V. Chobanova and Y. Choi and D. Cinabro and J. Dalseno and M. Danilov and Z. Doležal and Z. Dr{\'a}sal and D. Dutta and S. Eidelman and S. Esen and H. Farhat and Fast, {J. E.} and T. Ferber and V. Gaur and N. Gabyshev and S. Ganguly and R. Gillard and Goh, {Y. M.} and B. Golob and J. Haba and H. Hayashii and Y. Horii and Y. Hoshi and Hou, {W. S.} and Hyun, {H. J.} and T. Iijima and A. Ishikawa and T. Iwashita and I. Jaegle and T. Julius and Kah, {D. H.} and E. Kato and Kim, {D. Y.} and Kim, {H. J.} and Kim, {J. B.} and Kim, {M. J.} and Kim, {Y. J.} and K. Kinoshita and J. Klucar and Ko, {B. R.} 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 Kwon, {Y. J.} and Lee, {S. H.} and J. Li and Y. Li and {Li Gioi}, L. and Y. Liu and D. Liventsev and P. Lukin and H. Miyake and R. Mizuk and Mohanty, {G. B.} 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 Nisar, {N. K.} and O. Nitoh and S. Ogawa and S. Okuno and Y. Onuki and P. Pakhlov and G. Pakhlova and Park, {C. W.} and H. Park and Pedlar, {T. K.} and M. Petrič and Piilonen, {L. E.} and M. Ritter and M. R{\"o}hrken 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 Schwartz, {A. J.} and K. Senyo and O. Seon and Sevior, {M. E.} and M. Shapkin and Shen, {C. P.} and Shibata, {T. A.} and Shiu, {J. G.} and B. Shwartz and A. Sibidanov and F. Simon and Sohn, {Y. S.} 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 Vahsen, {S. E.} and {Van Hulse}, C. and P. Vanhoefer and G. Varner and Varvell, {K. E.} and Wagner, {M. N.} and Wang, {C. H.} and Wang, {M. Z.} and Y. Watanabe and Williams, {K. M.} and Eunil Won and Y. Yamashita and S. Yashchenko and Y. Yusa and V. Zhilich and V. Zhulanov and A. Zupanc",
year = "2013",
month = "11",
day = "14",
doi = "10.1103/PhysRevD.88.091104",
language = "English",
volume = "88",
journal = "Physical review D: Particles and fields",
issn = "0556-2821",
publisher = "American Institute of Physics Publising LLC",
number = "9",

}

TY - JOUR

T1 - Evidence for the suppressed decay B-→DK-, D→K+ π-π0

AU - Nayak, M.

AU - Libby, J.

AU - Trabelsi, K.

AU - Adachi, I.

AU - Aihara, H.

AU - Asner, D. M.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Bala, A.

AU - Behera, P.

AU - Belous, K.

AU - Bhardwaj, V.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chang, P.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Cho, I. S.

AU - Cho, K.

AU - Chobanova, V.

AU - Choi, Y.

AU - Cinabro, D.

AU - Dalseno, J.

AU - Danilov, M.

AU - Doležal, Z.

AU - Drásal, Z.

AU - Dutta, D.

AU - Eidelman, S.

AU - Esen, S.

AU - Farhat, H.

AU - Fast, J. E.

AU - Ferber, T.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Ganguly, S.

AU - Gillard, R.

AU - Goh, Y. M.

AU - Golob, B.

AU - Haba, J.

AU - Hayashii, H.

AU - Horii, Y.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Ishikawa, A.

AU - Iwashita, T.

AU - Jaegle, I.

AU - Julius, T.

AU - Kah, D. H.

AU - Kato, E.

AU - Kim, D. Y.

AU - Kim, H. J.

AU - Kim, J. B.

AU - Kim, M. J.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Klucar, J.

AU - Ko, B. R.

AU - Kodyš, P.

AU - Korpar, S.

AU - Krishnan, P.

AU - Križan, P.

AU - Krokovny, P.

AU - Kuhr, T.

AU - Kumita, T.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lee, S. H.

AU - Li, J.

AU - Li, Y.

AU - Li Gioi, L.

AU - Liu, Y.

AU - Liventsev, D.

AU - Lukin, P.

AU - Miyake, H.

AU - Mizuk, R.

AU - Mohanty, G. B.

AU - Moll, A.

AU - Mori, T.

AU - Muramatsu, N.

AU - Mussa, R.

AU - Nagasaka, Y.

AU - Nakao, M.

AU - Nedelkovska, E.

AU - Negishi, K.

AU - Ng, C.

AU - Nisar, N. K.

AU - Nitoh, O.

AU - Ogawa, S.

AU - Okuno, S.

AU - Onuki, Y.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Park, H.

AU - Pedlar, T. K.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - Ritter, M.

AU - Röhrken, M.

AU - Rostomyan, A.

AU - Sahoo, H.

AU - Saito, T.

AU - Sakai, Y.

AU - Sandilya, S.

AU - Santelj, L.

AU - Sanuki, T.

AU - Savinov, V.

AU - Schneider, O.

AU - Schnell, G.

AU - Schwanda, C.

AU - Schwartz, A. J.

AU - Senyo, K.

AU - Seon, O.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shen, C. P.

AU - Shibata, T. A.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Sibidanov, A.

AU - Simon, F.

AU - Sohn, Y. S.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Starič, M.

AU - Steder, M.

AU - Suzuki, Z.

AU - Tamponi, U.

AU - Tatishvili, G.

AU - Teramoto, Y.

AU - Uchida, M.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Urquijo, P.

AU - Vahsen, S. E.

AU - Van Hulse, C.

AU - Vanhoefer, P.

AU - Varner, G.

AU - Varvell, K. E.

AU - Wagner, M. N.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Watanabe, Y.

AU - Williams, K. M.

AU - Won, Eunil

AU - Yamashita, Y.

AU - Yashchenko, S.

AU - Yusa, Y.

AU - Zhilich, V.

AU - Zhulanov, V.

AU - Zupanc, A.

PY - 2013/11/14

Y1 - 2013/11/14

N2 - We report a study of the suppressed decay B-→DK -, D→K+π-π0, where D denotes either a D0 or a D̄0 meson. The decay is sensitive to the CP -violating parameter 3. Using a data sample of 772×106 BB̄ pairs collected at the Υ(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-π+π0. Our result is RDK=[1.98±0.62(stat)±0.24(syst)] ×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 ADK=0.41±0.30(stat)±0.05(syst). We also report measurements for the analogous quantities RDπ and A Dπ for the decay B-→Dπ-, D→K+π-π0.

AB - We report a study of the suppressed decay B-→DK -, D→K+π-π0, where D denotes either a D0 or a D̄0 meson. The decay is sensitive to the CP -violating parameter 3. Using a data sample of 772×106 BB̄ pairs collected at the Υ(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-π+π0. Our result is RDK=[1.98±0.62(stat)±0.24(syst)] ×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 ADK=0.41±0.30(stat)±0.05(syst). We also report measurements for the analogous quantities RDπ and A Dπ for the decay B-→Dπ-, D→K+π-π0.

UR - http://www.scopus.com/inward/record.url?scp=84888121403&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84888121403&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.88.091104

DO - 10.1103/PhysRevD.88.091104

M3 - Article

VL - 88

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 9

M1 - 091104

ER -