Measurement of the quark mixing parameter cos2phi1 using time-dependent Dalitz analysis of B0 -->D[KS(0)pi + pi-]h0

P Krokovny; K Abe; K Abe; I Adachi; H Aihara; D Anipko; K Arinstein; Y Asano; V Aulchenko; T Aushev; S Bahinipati; A M Bakich; V Balagura; E Barberio; A Bay; U Bitenc; I Bizjak; A Bondar; A Bozek; M Bracko; T E Browder; Y Chao; A Chen; W T Chen; Y Choi; A Chuvikov; S Cole; J Dalseno; M Danilov; M Dash; S Eidelman; D Epifanov; S Fratina; N Gabyshev; A Garmash; T Gershon; A Go; A Gorisek; H Ha; K Hayasaka; H Hayashii; M Hazumi; D Heffernan; T Higuchi; L Hinz; T Hokuue; Y Hoshi; S Hou; W-S Hou; Y B Hsiung; T Iijima; K Ikado; A Imoto; K Inami; A Ishikawa; H Ishino; R Itoh; M Iwasaki; Y Iwasaki; J H Kang; N Katayama; H Kawai; T Kawasaki; H Kichimi; H J Kim; S M Kim; K Kinoshita; S Korpar; P Krizan; R Kulasiri; R Kumar; C C Kuo; A Kuzmin; Y-J Kwon; J Lee; T Lesiak; J Li; S-W Lin; G Majumder; T Matsumoto; S McOnie; W Mitaroff; K Miyabayashi; Y Miyazaki; T Mori; I Nakamura; M Nakao; S Nishida; T Nozaki; S Ogawa; T Ohshima; T Okabe; S Okuno; H Ozaki; P Pakhlov; C W Park; H Park; L S Peak; R Pestotnik; L E Piilonen; A Poluektov; M Rozanska; Y Sakai; T R Sarangi; N Sato; N Satoyama; T Schietinger; O Schneider; K Senyo; H Shibuya; B Shwartz; J B Singh; A Sokolov; A Somov; N Soni; R Stamen; M Staric; H Stoeck; K Sumisawa; O Tajima; F Takasaki; K Tamai; M Tanaka; Y Teramoto; X C Tian; K Trabelsi; T Tsuboyama; T Tsukamoto; S Uehara; K Ueno; S Uno; P Urquijo; Y Ushiroda; G Varner; K E Varvell; S Villa; C C Wang; C H Wang; Y Watanabe; E Won; B D Yabsley; A Yamaguchi; Y Yamashita; M Yamauchi; J Ying; L M Zhang; Z P Zhang; V Zhilich; Belle Collaboration

doi:10.1103/PhysRevLett.97.081801

Measurement of the quark mixing parameter cos2phi1 using time-dependent Dalitz analysis of B0 -->D[KS(0)pi + pi-]h0

Phys Rev Lett. 2006 Aug 25;97(8):081801. doi: 10.1103/PhysRevLett.97.081801. Epub 2006 Aug 24.

Authors

P Krokovny¹, K Abe, K Abe, I Adachi, H Aihara, D Anipko, K Arinstein, Y Asano, V Aulchenko, T Aushev, S Bahinipati, A M Bakich, V Balagura, E Barberio, A Bay, U Bitenc, I Bizjak, A Bondar, A Bozek, M Bracko, T E Browder, Y Chao, A Chen, W T Chen, Y Choi, A Chuvikov, S Cole, J Dalseno, M Danilov, M Dash, S Eidelman, D Epifanov, S Fratina, N Gabyshev, A Garmash, T Gershon, A Go, A Gorisek, H Ha, K Hayasaka, H Hayashii, M Hazumi, D Heffernan, T Higuchi, L Hinz, T Hokuue, Y Hoshi, S Hou, W-S Hou, Y B Hsiung, T Iijima, K Ikado, A Imoto, K Inami, A Ishikawa, H Ishino, R Itoh, M Iwasaki, Y Iwasaki, J H Kang, N Katayama, H Kawai, T Kawasaki, H Kichimi, H J Kim, S M Kim, K Kinoshita, S Korpar, P Krizan, R Kulasiri, R Kumar, C C Kuo, A Kuzmin, Y-J Kwon, J Lee, T Lesiak, J Li, S-W Lin, G Majumder, T Matsumoto, S McOnie, W Mitaroff, K Miyabayashi, Y Miyazaki, T Mori, I Nakamura, M Nakao, S Nishida, T Nozaki, S Ogawa, T Ohshima, T Okabe, S Okuno, H Ozaki, P Pakhlov, C W Park, H Park, L S Peak, R Pestotnik, L E Piilonen, A Poluektov, M Rozanska, Y Sakai, T R Sarangi, N Sato, N Satoyama, T Schietinger, O Schneider, K Senyo, H Shibuya, B Shwartz, J B Singh, A Sokolov, A Somov, N Soni, R Stamen, M Staric, H Stoeck, K Sumisawa, O Tajima, F Takasaki, K Tamai, M Tanaka, Y Teramoto, X C Tian, K Trabelsi, T Tsuboyama, T Tsukamoto, S Uehara, K Ueno, S Uno, P Urquijo, Y Ushiroda, G Varner, K E Varvell, S Villa, C C Wang, C H Wang, Y Watanabe, E Won, B D Yabsley, A Yamaguchi, Y Yamashita, M Yamauchi, J Ying, L M Zhang, Z P Zhang, V Zhilich; Belle Collaboration

Affiliation

¹ High Energy Accelerator Research Organization (KEK), Tsukuba.

PMID: 17026290
DOI: 10.1103/PhysRevLett.97.081801

Abstract

We present a measurement of the angle phi1 of the Cabibbo-Kobayashi-Maskawa unitarity triangle using a time-dependent Dalitz analysis of D-->KS(0)pi + pi- decays produced in neutral B meson decay to a neutral D meson and a light meson (B0-->D*h0). The method allows a direct extraction of 2phi1 and, therefore, helps to resolve the ambiguity between 2phi1 and pi-2phi1 in the measurement of sin2phi1. We obtain sin2phi1= 0.78 +/- 0.44 +/- 0.22 and cos2varphi1 = 1.87(-0.53-0.32)(+0.40 + 0.22). The sign of cos2phi1 is determined to be positive at 98.3% C.L.