Search for CP violation in the decays D(s)+ --> KS0pi+ and D(s)+ --> KS0K+

B R Ko; E Won; H Aihara; V Aulchenko; T Aushev; A M Bakich; V Balagura; E Barberio; K Belous; V Bhardwaj; M Bischofberger; A Bozek; M Bracko; T E Browder; P Chang; A Chen; P Chen; B G Cheon; I-S Cho; Y Choi; J Dalseno; A Das; Z Dolezal; A Drutskoy; S Eidelman; P Goldenzweig; B Golob; H Ha; T Hara; H Hayashii; Y Horii; Y Hoshi; W-S Hou; Y B Hsiung; H J Hyun; T Iijima; K Inami; R Itoh; M Iwabuchi; M Iwasaki; N J Joshi; D H Kah; J H Kang; P Kapusta; N Katayama; T Kawasaki; H O Kim; Y J Kim; S Korpar; P Krizan; P Krokovny; T Kuhr; T Kumita; Y-J Kwon; S-H Kyeong; J S Lange; M J Lee; S-H Lee; J Li; C Liu; Y Liu; D Liventsev; R Louvot; A Matyja; S McOnie; H Miyata; R Mizuk; E Nakano; M Nakao; Z Natkaniec; S Neubauer; S Nishida; O Nitoh; S Ogawa; T Ohshima; S Okuno; S L Olsen; W Ostrowicz; P Pakhlov; G Pakhlova; H Palka; C W Park; H Park; H K Park; R Pestotnik; M Petric; L E Piilonen; M Röhrken; S Ryu; H Sahoo; Y Sakai; O Schneider; C Schwanda; A J Schwartz; R Seidl; K Senyo; M E Sevior; M Shapkin; V Shebalin; C P Shen; J-G Shiu; J B Singh; P Smerkol; A Sokolov; E Solovieva; S Stanic; M Staric; T Sumiyoshi; M Tanaka; G N Taylor; Y Teramoto; K Trabelsi; S Uehara; Y Unno; S Uno; G Varner; K E Varvell; K Vervink; C H Wang; M-Z Wang; P Wang; M Watanabe; Y Watanabe; B D Yabsley; Y Yamashita; M Yamauchi; Z P Zhang; V Zhilich; T Zivko; A Zupanc; O Zyukova; Belle Collaboration

doi:10.1103/PhysRevLett.104.181602

Search for CP violation in the decays D(s)+ --> KS0pi+ and D(s)+ --> KS0K+

Phys Rev Lett. 2010 May 7;104(18):181602. doi: 10.1103/PhysRevLett.104.181602. Epub 2010 May 7.

Authors

B R Ko¹, E Won, H Aihara, V Aulchenko, T Aushev, A M Bakich, V Balagura, E Barberio, K Belous, V Bhardwaj, M Bischofberger, A Bozek, M Bracko, T E Browder, P Chang, A Chen, P Chen, B G Cheon, I-S Cho, Y Choi, J Dalseno, A Das, Z Dolezal, A Drutskoy, S Eidelman, P Goldenzweig, B Golob, H Ha, T Hara, H Hayashii, Y Horii, Y Hoshi, W-S Hou, Y B Hsiung, H J Hyun, T Iijima, K Inami, R Itoh, M Iwabuchi, M Iwasaki, N J Joshi, D H Kah, J H Kang, P Kapusta, N Katayama, T Kawasaki, H O Kim, Y J Kim, S Korpar, P Krizan, P Krokovny, T Kuhr, T Kumita, Y-J Kwon, S-H Kyeong, J S Lange, M J Lee, S-H Lee, J Li, C Liu, Y Liu, D Liventsev, R Louvot, A Matyja, S McOnie, H Miyata, R Mizuk, E Nakano, M Nakao, Z Natkaniec, S Neubauer, S Nishida, O Nitoh, S Ogawa, T Ohshima, S Okuno, S L Olsen, W Ostrowicz, P Pakhlov, G Pakhlova, H Palka, C W Park, H Park, H K Park, R Pestotnik, M Petric, L E Piilonen, M Röhrken, S Ryu, H Sahoo, Y Sakai, O Schneider, C Schwanda, A J Schwartz, R Seidl, K Senyo, M E Sevior, M Shapkin, V Shebalin, C P Shen, J-G Shiu, J B Singh, P Smerkol, A Sokolov, E Solovieva, S Stanic, M Staric, T Sumiyoshi, M Tanaka, G N Taylor, Y Teramoto, K Trabelsi, S Uehara, Y Unno, S Uno, G Varner, K E Varvell, K Vervink, C H Wang, M-Z Wang, P Wang, M Watanabe, Y Watanabe, B D Yabsley, Y Yamashita, M Yamauchi, Z P Zhang, V Zhilich, T Zivko, A Zupanc, O Zyukova; Belle Collaboration

Affiliation

¹ Korea University, Seoul.

PMID: 20482167
DOI: 10.1103/PhysRevLett.104.181602

Abstract

We have searched for CP violation in the charmed meson decays D((s))(+) --> K(S)(0)pi(+) and D((s))(+) --> K(S)(0)K(+) using 673 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No evidence for CP violation is observed. We report the most sensitive CP asymmetry measurements to date for these decays: A(CP)(D(+)-->K(S)(0)pi(+)) = (-0.71 +/- 0.19 +/- 0.20)%, A(CP)(D(s)(+) --> K(S)(0)pi(+)) = (+5.45 +/- 2.50 +/- 0.33)%, A(CP)(D(+) --> K(S)(0)K(+)) = (-0.16 +/- 0.58 +/- 0.25)%, and A(CP)(D(s)(+) --> K(S)(0)K(+)) = (+0.12 +/- 0.36 +/- 0.22)%, where the first uncertainties are statistical and the second are systematic.