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

Y Horii; K Trabelsi; H Yamamoto; I Adachi; H Aihara; K Arinstein; V Aulchenko; T Aushev; V Balagura; E Barberio; K Belous; B Bhuyan; M Bischofberger; A Bozek; M Bračko; T E Browder; M-C Chang; P Chang; A Chen; P Chen; B G Cheon; C-C Chiang; I-S Cho; K Cho; Y Choi; Z Doležal; S Eidelman; M Feindt; V Gaur; N Gabyshev; A Garmash; B Golob; H Ha; J Haba; K Hayasaka; Y Hoshi; W-S Hou; Y B Hsiung; H J Hyun; T Iijima; K Inami; A Ishikawa; R Itoh; M Iwabuchi; Y Iwasaki; T Iwashita; N J Joshi; T Julius; J H Kang; T Kawasaki; H Kichimi; C Kiesling; H J Kim; H O Kim; M J Kim; Y J Kim; K Kinoshita; B R Ko; N Kobayashi; S Korpar; P Križan; T Kuhr; R Kumar; Y -J Kwon; M J Lee; S-H Lee; J Li; C Liu; D Liventsev; R Louvot; A Matyja; S McOnie; K Miyabayashi; H Miyata; Y Miyazaki; G B Mohanty; A Moll; T Mori; N Muramatsu; E Nakano; H Nakazawa; Z Natkaniec; S Neubauer; S Nishida; O Nitoh; T Ohshima; S Okuno; Y Onuki; P Pakhlov; G Pakhlova; C W Park; H K Park; R Pestotnik; M Petrič; L E Piilonen; A Poluektov; M Prim; K Prothmann; M Röhrken; S Ryu; H Sahoo; Y Sakai; O Schneider; C Schwanda; A J Schwartz; K Senyo; O Seon; M E Sevior; M Shapkin; V Shebalin; C P Shen; T-A Shibata; J-G Shiu; F Simon; P Smerkol; Y -S Sohn; E Solovieva; S Stanič; M Starič; M Sumihama; T Sumiyoshi; S Suzuki; S Tanaka; Y Teramoto; M Uchida; S Uehara; T Uglov; Y Unno; S Uno; Y Usov; G Varner; A Vinokurova; A Vossen; C H Wang; P Wang; M Watanabe; Y Watanabe; J Wicht; E Won; B D Yabsley; Y Yamashita; D Zander; Z P Zhang; V Zhulanov; A Zupanc; Belle Collaboration

doi:10.1103/PhysRevLett.106.231803

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

Phys Rev Lett. 2011 Jun 10;106(23):231803. doi: 10.1103/PhysRevLett.106.231803. Epub 2011 Jun 10.

Authors

Y Horii¹, K Trabelsi, H Yamamoto, I Adachi, H Aihara, K Arinstein, V Aulchenko, T Aushev, V Balagura, E Barberio, K Belous, B Bhuyan, M Bischofberger, A Bozek, M Bračko, T E Browder, M-C Chang, P Chang, A Chen, P Chen, B G Cheon, C-C Chiang, I-S Cho, K Cho, Y Choi, Z Doležal, S Eidelman, M Feindt, V Gaur, N Gabyshev, A Garmash, B Golob, H Ha, J Haba, K Hayasaka, Y Hoshi, W-S Hou, Y B Hsiung, H J Hyun, T Iijima, K Inami, A Ishikawa, R Itoh, M Iwabuchi, Y Iwasaki, T Iwashita, N J Joshi, T Julius, J H Kang, T Kawasaki, H Kichimi, C Kiesling, H J Kim, H O Kim, M J Kim, Y J Kim, K Kinoshita, B R Ko, N Kobayashi, S Korpar, P Križan, T Kuhr, R Kumar, Y -J Kwon, M J Lee, S-H Lee, J Li, C Liu, D Liventsev, R Louvot, A Matyja, S McOnie, K Miyabayashi, H Miyata, Y Miyazaki, G B Mohanty, A Moll, T Mori, N Muramatsu, E Nakano, H Nakazawa, Z Natkaniec, S Neubauer, S Nishida, O Nitoh, T Ohshima, S Okuno, Y Onuki, P Pakhlov, G Pakhlova, C W Park, H K Park, R Pestotnik, M Petrič, L E Piilonen, A Poluektov, M Prim, K Prothmann, M Röhrken, S Ryu, H Sahoo, Y Sakai, O Schneider, C Schwanda, A J Schwartz, K Senyo, O Seon, M E Sevior, M Shapkin, V Shebalin, C P Shen, T-A Shibata, J-G Shiu, F Simon, P Smerkol, Y -S Sohn, E Solovieva, S Stanič, M Starič, M Sumihama, T Sumiyoshi, S Suzuki, S Tanaka, Y Teramoto, M Uchida, S Uehara, T Uglov, Y Unno, S Uno, Y Usov, G Varner, A Vinokurova, A Vossen, C H Wang, P Wang, M Watanabe, Y Watanabe, J Wicht, E Won, B D Yabsley, Y Yamashita, D Zander, Z P Zhang, V Zhulanov, A Zupanc; Belle Collaboration

Affiliation

¹ Tohoku University, Sendai, Japan.

PMID: 21770499
DOI: 10.1103/PhysRevLett.106.231803

Abstract

The suppressed decay chain B(-)→DK(-), D→K(+)π(-), where D indicates a D(¯)(0) or D(0) state, provides important information on the CP-violating angle ϕ(3). We measure the ratio R(DK) of the decay rates to the favored mode B(-)→DK(-), D→K(-)π(+) to be R(DK)=[1.63(-0.41)(+0.44)(stat)(-0.13)(+0.07)(syst)]×10(-2), which indicates the first evidence of the signal with a significance of 4.1σ. We also measure the asymmetry A(DK) between the charge-conjugate decays to be A(DK)=-0.39(-0.28)(+0.26)(stat)(-0.03)(+0.04)(syst). The results are based on the full 772×10(6) BB(¯) pair data sample collected at the Υ(4S) resonance with the Belle detector.