Evidence for CP violation in the decay D+ → K(S)(0)π+

B R Ko; E Won; I Adachi; H Aihara; D M Asner; V Aulchenko; T Aushev; T Aziz; A M Bakich; K Belous; V Bhardwaj; B Bhuyan; M Bischofberger; A Bondar; G Bonvicini; A Bozek; M Bračko; T E Browder; M-C Chang; A Chen; P Chen; B G Cheon; K Chilikin; I-S Cho; K Cho; Y Choi; Z Doležal; Z Drásal; S Eidelman; J E Fast; V Gaur; N Gabyshev; A Garmash; Y M Goh; B Golob; J Haba; K Hayasaka; H Hayashii; Y Horii; Y Hoshi; W-S Hou; Y B Hsiung; H J Hyun; T Iijima; A Ishikawa; R Itoh; M Iwabuchi; Y Iwasaki; T Iwashita; T Julius; J H Kang; T Kawasaki; C Kiesling; H O Kim; J B Kim; K T Kim; M J Kim; Y J Kim; K Kinoshita; S Koblitz; P Kodyš; S Korpar; P Križan; P Krokovny; T Kuhr; A Kuzmin; Y-J Kwon; J S Lange; S-H Lee; J Li; Y Li; J Libby; C-L Lim; C Liu; Y Liu; Z Q Liu; D Liventsev; R Louvot; D Matvienko; Y Miyazaki; R Mizuk; G B Mohanty; A Moll; T Mori; N Muramatsu; Y Nagasaka; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Nishida; K Nishimura; O Nitoh; S Ogawa; T Ohshima; S Okuno; S L Olsen; Y Onuki; W Ostrowicz; P Pakhlov; G Pakhlova; C W Park; H K Park; K S Park; T K Pedlar; R Pestotnik; M Petrič; L E Piilonen; A Poluektov; M Ritter; M Röhrken; S Ryu; H Sahoo; K Sakai; Y Sakai; T Sanuki; Y Sato; O Schneider; C Schwanda; A J Schwartz; R Seidl; K Senyo; M E Sevior; M Shapkin; V Shebalin; C P Shen; T-A Shibata; J-G Shiu; B Shwartz; A Sibidanov; F Simon; P Smerkol; Y-S Sohn; A Sokolov; E Solovieva; S Stanič; M Starič; T Sumiyoshi; S Tanaka; G Tatishvili; Y Teramoto; K Trabelsi; T Tsuboyama; M Uchida; S Uehara; Y Unno; S Uno; G Varner; K E Varvell; A Vinokurova; V Vorobyev; C H Wang; P Wang; X L Wang; M Watanabe; Y Watanabe; H Yamamoto; Y Yamashita; C Z Yuan; C C Zhang; Z P Zhang; V Zhilich; V Zhulanov; A Zupanc; Belle Collaboration

doi:10.1103/PhysRevLett.109.021601

Evidence for CP violation in the decay D+ → K(S)(0)π+

Phys Rev Lett. 2012 Jul 13;109(2):021601. doi: 10.1103/PhysRevLett.109.021601. Epub 2012 Jul 11.

Authors

B R Ko¹, E Won, I Adachi, H Aihara, D M Asner, V Aulchenko, T Aushev, T Aziz, A M Bakich, K Belous, V Bhardwaj, B Bhuyan, M Bischofberger, A Bondar, G Bonvicini, A Bozek, M Bračko, T E Browder, M-C Chang, A Chen, P Chen, B G Cheon, K Chilikin, I-S Cho, K Cho, Y Choi, Z Doležal, Z Drásal, S Eidelman, J E Fast, V Gaur, N Gabyshev, A Garmash, Y M Goh, B Golob, J Haba, K Hayasaka, H Hayashii, Y Horii, Y Hoshi, W-S Hou, Y B Hsiung, H J Hyun, T Iijima, A Ishikawa, R Itoh, M Iwabuchi, Y Iwasaki, T Iwashita, T Julius, J H Kang, T Kawasaki, C Kiesling, H O Kim, J B Kim, K T Kim, M J Kim, Y J Kim, K Kinoshita, S Koblitz, P Kodyš, S Korpar, P Križan, P Krokovny, T Kuhr, A Kuzmin, Y-J Kwon, J S Lange, S-H Lee, J Li, Y Li, J Libby, C-L Lim, C Liu, Y Liu, Z Q Liu, D Liventsev, R Louvot, D Matvienko, Y Miyazaki, R Mizuk, G B Mohanty, A Moll, T Mori, N Muramatsu, Y Nagasaka, E Nakano, M Nakao, H Nakazawa, Z Natkaniec, S Nishida, K Nishimura, O Nitoh, S Ogawa, T Ohshima, S Okuno, S L Olsen, Y Onuki, W Ostrowicz, P Pakhlov, G Pakhlova, C W Park, H K Park, K S Park, T K Pedlar, R Pestotnik, M Petrič, L E Piilonen, A Poluektov, M Ritter, M Röhrken, S Ryu, H Sahoo, K Sakai, Y Sakai, T Sanuki, Y Sato, O Schneider, C Schwanda, A J Schwartz, R Seidl, K Senyo, M E Sevior, M Shapkin, V Shebalin, C P Shen, T-A Shibata, J-G Shiu, B Shwartz, A Sibidanov, F Simon, P Smerkol, Y-S Sohn, A Sokolov, E Solovieva, S Stanič, M Starič, T Sumiyoshi, S Tanaka, G Tatishvili, Y Teramoto, K Trabelsi, T Tsuboyama, M Uchida, S Uehara, Y Unno, S Uno, G Varner, K E Varvell, A Vinokurova, V Vorobyev, C H Wang, P Wang, X L Wang, M Watanabe, Y Watanabe, H Yamamoto, Y Yamashita, C Z Yuan, C C Zhang, Z P Zhang, V Zhilich, V Zhulanov, A Zupanc; Belle Collaboration

Affiliation

¹ Korea University, Seoul.

PMID: 23030153
DOI: 10.1103/PhysRevLett.109.021601

Abstract

We observe evidence for CP violation in the decay D+ → K(S)(0)π+ using a data sample with an integrated luminosity of 977 fb(-1) collected by the Belle detector at the KEKB e+ e- asymmetric-energy collider. The CP asymmetry in the decay is measured to be (-0.363±0.094±0.067)%, which is 3.2 standard deviations away from zero, and is consistent with the expected CP violation due to the neutral kaon in the final state.