Measurement of the wrong-sign decays D0 --> K+ pi- pi0 and D0 --> K+ pi- pi+ pi-, and search for CP violation

X C Tian; Y Ban; K Abe; K Abe; H Aihara; K Arinstein; Y Asano; V Aulchenko; T Aushev; A M Bakich; S Banerjee; E Barberio; M Barbero; A Bay; I Bedny; U Bitenc; I Bizjak; S Blyth; A Bondar; A Bozek; M Bracko; J Brodzicka; T E Browder; P Chang; Y Chao; A Chen; K-F Chen; W T Chen; B G Cheon; R Chistov; S-K Choi; Y Choi; Y K Choi; A Chuvikov; J Dalseno; M Danilov; M Dash; L Y Dong; A Drutskoy; S Eidelman; Y Enari; F Fang; S Fratina; N Gabyshev; T Gershon; G Gokhroo; B Golob; A Gorisek; J Haba; T Hara; K Hayasaka; H Hayashii; M Hazumi; T Hokuue; Y Hoshi; S Hou; W-S Hou; T Iijima; K Ikado; A Imoto; K Inami; A Ishikawa; R Itoh; Y Iwasaki; J H Kang; J S Kang; P Kapusta; N Katayama; H Kawai; T Kawasaki; H R Khan; H Kichimi; S K Kim; S M Kim; K Kinoshita; S Korpar; P Krizan; P Krokovny; R Kulasiri; C C Kuo; A Kuzmin; Y-J Kwon; G Leder; S E Lee; T Lesiak; J Li; S-W Lin; D Liventsev; F Mandl; T Matsumoto; A Matyja; W Mitaroff; K Miyabayashi; H Miyake; H Miyata; Y Miyazaki; R Mizuk; G R Moloney; T Mori; T Nagamine; Y Nagasaka; E Nakano; H Nakazawa; S Nishida; O Nitoh; S Ogawa; T Ohshima; T Okabe; S Okuno; S L Olsen; Y Onuki; H Ozaki; H Palka; C W Park; H Park; R Pestotnik; L E Piilonen; Y Sakai; N Sato; N Satoyama; K Sayeed; T Schietinger; O Schneider; C Schwanda; A J Schwartz; M E Sevior; H Shibuya; B Shwartz; V Sidorov; J B Singh; A Somov; N Soni; S Stanic; M Staric; T Sumiyoshi; S Suzuki; F Takasaki; K Tamai; N Tamura; M Tanaka; G N Taylor; Y Teramoto; T Tsukamoto; S Uehara; T Uglov; K Ueno; S Uno; P Urquijo; G Varner; K E Varvell; S Villa; C C Wang; C H Wang; M-Z Wang; Q L Xie; B D Yabsley; A Yamaguchi; Y Yamashita; M Yamauchi; J Ying; Y Yuan; C C Zhang; L M Zhang; Z P Zhang; Belle Collaboration

doi:10.1103/PhysRevLett.95.231801

Measurement of the wrong-sign decays D0 --> K+ pi- pi0 and D0 --> K+ pi- pi+ pi-, and search for CP violation

Phys Rev Lett. 2005 Dec 2;95(23):231801. doi: 10.1103/PhysRevLett.95.231801. Epub 2005 Nov 29.

Authors

X C Tian¹, Y Ban, K Abe, K Abe, H Aihara, K Arinstein, Y Asano, V Aulchenko, T Aushev, A M Bakich, S Banerjee, E Barberio, M Barbero, A Bay, I Bedny, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka, T E Browder, P Chang, Y Chao, A Chen, K-F Chen, W T Chen, B G Cheon, R Chistov, S-K Choi, Y Choi, Y K Choi, A Chuvikov, J Dalseno, M Danilov, M Dash, L Y Dong, A Drutskoy, S Eidelman, Y Enari, F Fang, S Fratina, N Gabyshev, T Gershon, G Gokhroo, B Golob, A Gorisek, J Haba, T Hara, K Hayasaka, H Hayashii, M Hazumi, T Hokuue, Y Hoshi, S Hou, W-S Hou, T Iijima, K Ikado, A Imoto, K Inami, A Ishikawa, R Itoh, Y Iwasaki, J H Kang, J S Kang, P Kapusta, N Katayama, H Kawai, T Kawasaki, H R Khan, H Kichimi, S K Kim, S M Kim, K Kinoshita, S Korpar, P Krizan, P Krokovny, R Kulasiri, C C Kuo, A Kuzmin, Y-J Kwon, G Leder, S E Lee, T Lesiak, J Li, S-W Lin, D Liventsev, F Mandl, T Matsumoto, A Matyja, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, Y Miyazaki, R Mizuk, G R Moloney, T Mori, T Nagamine, Y Nagasaka, E Nakano, H Nakazawa, S Nishida, O Nitoh, S Ogawa, T Ohshima, T Okabe, S Okuno, S L Olsen, Y Onuki, H Ozaki, H Palka, C W Park, H Park, R Pestotnik, L E Piilonen, Y Sakai, N Sato, N Satoyama, K Sayeed, T Schietinger, O Schneider, C Schwanda, A J Schwartz, M E Sevior, H Shibuya, B Shwartz, V Sidorov, J B Singh, A Somov, N Soni, S Stanic, M Staric, T Sumiyoshi, S Suzuki, F Takasaki, K Tamai, N Tamura, M Tanaka, G N Taylor, Y Teramoto, T Tsukamoto, S Uehara, T Uglov, K Ueno, S Uno, P Urquijo, G Varner, K E Varvell, S Villa, C C Wang, C H Wang, M-Z Wang, Q L Xie, B D Yabsley, A Yamaguchi, Y Yamashita, M Yamauchi, J Ying, Y Yuan, C C Zhang, L M Zhang, Z P Zhang; Belle Collaboration

Affiliation

¹ Peking University, Beijing.

PMID: 16384295
DOI: 10.1103/PhysRevLett.95.231801

Abstract

Using 281 fb-1 of data from the Belle experiment recorded at or near the (4S) resonance, we have measured the rates of the "wrong-sign" decays D0 --> K+ pi- pi0 and D0 --> K+ pi- pi+ pi- relative to those of the Cabibbo-favored decays D0 --> K- pi+ pi0 and D0 --> K- pi+ pi+ pi-. These wrong-sign decays proceed via a doubly Cabibbo-suppressed amplitude or via D0-D0 mixing; the latter has not yet been observed. We obtain R(WS)(K pi pi0) = [0.229 +/- 0.015(stat)(+0.013)(-0.009)(syst)]% and R(WS)(K3pi) = [0.320 +/- 0.018(stat)(+0.018)(0.013)(syst)]%. The CP asymmetries are measured to be -0.006 +/- 0.053 and -0.018 +/- 0.044 for the K+ pi- pi0 and K+ pi- pi+ pi- final states, respectively.