Observation of time-dependent CP violation in B0→η′K0 decays and improved measurements of CP asymmetries in B0→φK0, KS0KS0KS0 and B0→J/ψK0 decays

K. F. Chen; K. Hara; M. Hazumi; T. Higuchi; K. Miyabayashi; Y. Nakahama; K. Sumisawa; O. Tajima; Y. Ushiroda; Y. Yusa; K. Abe; K. Abe; I. Adachi; H. Aihara; D. Anipko; K. Arinstein; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; V. Balagura; S. Banerjee; E. Barberio; M. Barbero; A. Bay; K. Belous; U. Bitenc; I. Bizjak; S. Blyth; A. Bondar; A. Bozek; M. Bračko; J. Brodzicka; T. E. Browder; P. Chang; Y. Chao; A. Chen; W. T. Chen; B. G. Cheon; R. Chistov; S. K. Choi; Y. Choi; Y. K. Choi; A. Chuvikov; S. Cole; J. Dalseno; M. Danilov; M. Dash; J. Dragic; A. Drutskoy; S. Eidelman; D. Epifanov; S. Fratina; A. Garmash; T. Gershon; A. Go; G. Gokhroo; P. Goldenzweig; B. Golob; H. Ha; J. Haba; T. Hara; K. Hayasaka; H. Hayashii; D. Heffernan; 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; H. Kakuno; J. H. Kang; S. U. Kataoka; N. Katayama; H. Kawai; T. Kawasaki; H. R. Khan; H. Kichimi; H. J. Kim; S. K. Kim; Y. J. Kim; K. Kinoshita; S. Korpar; P. Križan; P. Krokovny; R. Kulasiri; R. Kumar; C. C. Kuo; A. Kusaka; A. Kuzmin; Y. J. Kwon; G. Leder; J. Lee; M. J. Lee; T. Lesiak; J. Li; A. Limosani; S. W. Lin; Y. Liu; D. Liventsev; G. Majumder; F. Mandl; T. Matsumoto; A. Matyja; W. Mitaroff; H. Miyake; H. Miyata; Y. Miyazaki; R. Mizuk; D. Mohapatra; G. R. Moloney; A. Murakami; T. Nagamine; Y. Nagasaka; I. Nakamura; E. Nakano; M. Nakao; Z. Natkaniec; S. Nishida; O. Nitoh; S. Noguchi; T. Nozaki; S. Ogawa; T. Ohshima; S. Okuno; S. L. Olsen; Y. Onuki; W. Ostrowicz; H. Ozaki; P. Pakhlov; G. Pakhlova; H. Palka; H. Park; R. Pestotnik; L. E. Piilonen; H. Sahoo; Y. Sakai; N. Satoyama; T. Schietinger; O. Schneider; J. Schümann; A. J. Schwartz; R. Seidl; K. Senyo; M. E. Sevior; M. Shapkin; H. Shibuya; B. Shwartz; J. B. Singh; A. Sokolov; A. Somov; S. Stanič; M. Starič; H. Stoeck; T. Sumiyoshi; S. Suzuki; F. Takasaki; K. Tamai; N. Tamura; M. Tanaka; G. N. Taylor; Y. Teramoto; X. C. Tian; K. Trabelsi; T. Tsuboyama; T. Tsukamoto; S. Uehara; T. Uglov; K. Ueno; Y. Unno; S. Uno; P. Urquijo; Y. Usov; G. Varner; K. E. Varvell; S. Villa; C. C. Wang; C. H. Wang; M. Z. Wang; Y. Watanabe; R. Wedd; E. Won; Q. L. Xie; B. D. Yabsley; A. Yamaguchi; Y. Yamashita; M. Yamauchi; C. C. Zhang; Z. P. Zhang; V. Zhilich; A. Zupanc

doi:10.1103/PhysRevLett.98.031802

Observation of time-dependent CP violation in B0→η′K0 decays and improved measurements of CP asymmetries in B0→φK0, KS0KS0KS0 and B0→J/ψK0 decays

K. F. Chen, K. Hara, M. Hazumi, T. Higuchi, K. Miyabayashi, Y. Nakahama, K. Sumisawa, O. Tajima, Y. Ushiroda, Y. Yusa, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. BakichV. Balagura, S. Banerjee, E. Barberio, M. Barbero, A. Bay, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, A. Garmash, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, D. Heffernan, 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, H. Kakuno, J. H. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kusaka, A. Kuzmin, Y. J. Kwon, G. Leder, J. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, S. W. Lin, Y. Liu, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, A. Murakami, T. Nagamine, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

Department of Physics

Research output: Contribution to journal › Article › peer-review

167 Citations (Scopus)

Abstract

We present improved measurements of CP-violation parameters in B0→K0, η′K0, KS0KS0KS0 decays based on a sample of 535×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We obtain sin 2 1eff=+0.64±0.10(stat) ±0.04(syst) for B0→η′K0, +0.50±0.21(stat)±0. 06(syst) for B0→ K0, and +0.30±0.32(stat)±0.08(syst) for B0→KS0KS0KS0 decays. We have observed CP violation in the B0→η′K0 decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B0→J/ψK0 decays and obtain sin 2 1=+0.642±0.031(stat)±0.017(syst).

Original language	English
Article number	031802
Journal	Physical review letters
Volume	98
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.98.031802
Publication status	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.98.031802

Cite this

Chen, K. F., Hara, K., Hazumi, M., Higuchi, T., Miyabayashi, K., Nakahama, Y., Sumisawa, K., Tajima, O., Ushiroda, Y., Yusa, Y., Abe, K., Abe, K., Adachi, I., Aihara, H., Anipko, D., Arinstein, K., Aulchenko, V., Aushev, T., Aziz, T., ... Zupanc, A. (2007). Observation of time-dependent CP violation in B0→η′K0 decays and improved measurements of CP asymmetries in B0→φK0, KS0KS0KS0 and B0→J/ψK0 decays. Physical review letters, 98(3), [031802]. https://doi.org/10.1103/PhysRevLett.98.031802

Chen, KF, Hara, K, Hazumi, M, Higuchi, T, Miyabayashi, K, Nakahama, Y, Sumisawa, K, Tajima, O, Ushiroda, Y, Yusa, Y, Abe, K, Abe, K, Adachi, I, Aihara, H, Anipko, D, Arinstein, K, Aulchenko, V, Aushev, T, Aziz, T, Bakich, AM, Balagura, V, Banerjee, S, Barberio, E, Barbero, M, Bay, A, Belous, K, Bitenc, U, Bizjak, I, Blyth, S, Bondar, A, Bozek, A, Bračko, M, Brodzicka, J, Browder, TE, Chang, P, Chao, Y, Chen, A, Chen, WT, Cheon, BG, Chistov, R, Choi, SK, Choi, Y, Choi, YK, Chuvikov, A, Cole, S, Dalseno, J, Danilov, M, Dash, M, Dragic, J, Drutskoy, A, Eidelman, S, Epifanov, D, Fratina, S, Garmash, A, Gershon, T, Go, A, Gokhroo, G, Goldenzweig, P, Golob, B, Ha, H, Haba, J, Hara, T, Hayasaka, K, Hayashii, H, Heffernan, D, Hokuue, T, Hoshi, Y, Hou, S, Hou, WS, Hsiung, YB, Iijima, T, Ikado, K, Imoto, A, Inami, K, Ishikawa, A, Ishino, H, Itoh, R, Iwasaki, M, Iwasaki, Y, Kakuno, H, Kang, JH, Kataoka, SU, Katayama, N, Kawai, H, Kawasaki, T, Khan, HR, Kichimi, H, Kim, HJ, Kim, SK, Kim, YJ, Kinoshita, K, Korpar, S, Križan, P, Krokovny, P, Kulasiri, R, Kumar, R, Kuo, CC, Kusaka, A, Kuzmin, A, Kwon, YJ, Leder, G, Lee, J, Lee, MJ, Lesiak, T, Li, J, Limosani, A, Lin, SW, Liu, Y, Liventsev, D, Majumder, G, Mandl, F, Matsumoto, T, Matyja, A, Mitaroff, W, Miyake, H, Miyata, H, Miyazaki, Y, Mizuk, R, Mohapatra, D, Moloney, GR, Murakami, A, Nagamine, T, Nagasaka, Y, Nakamura, I, Nakano, E, Nakao, M, Natkaniec, Z, Nishida, S, Nitoh, O, Noguchi, S, Nozaki, T, Ogawa, S, Ohshima, T, Okuno, S, Olsen, SL, Onuki, Y, Ostrowicz, W, Ozaki, H, Pakhlov, P, Pakhlova, G, Palka, H, Park, H, Pestotnik, R, Piilonen, LE, Sahoo, H, Sakai, Y, Satoyama, N, Schietinger, T, Schneider, O, Schümann, J, Schwartz, AJ, Seidl, R, Senyo, K, Sevior, ME, Shapkin, M, Shibuya, H, Shwartz, B, Singh, JB, Sokolov, A, Somov, A, Stanič, S, Starič, M, Stoeck, H, Sumiyoshi, T, Suzuki, S, Takasaki, F, Tamai, K, Tamura, N, Tanaka, M, Taylor, GN, Teramoto, Y, Tian, XC, Trabelsi, K, Tsuboyama, T, Tsukamoto, T, Uehara, S, Uglov, T, Ueno, K, Unno, Y, Uno, S, Urquijo, P, Usov, Y, Varner, G, Varvell, KE, Villa, S, Wang, CC, Wang, CH, Wang, MZ, Watanabe, Y, Wedd, R, Won, E, Xie, QL, Yabsley, BD, Yamaguchi, A, Yamashita, Y, Yamauchi, M, Zhang, CC, Zhang, ZP, Zhilich, V & Zupanc, A 2007, 'Observation of time-dependent CP violation in B0→η′K0 decays and improved measurements of CP asymmetries in B0→φK0, KS0KS0KS0 and B0→J/ψK0 decays', Physical review letters, vol. 98, no. 3, 031802. https://doi.org/10.1103/PhysRevLett.98.031802

@article{fd87b3f32b53429f8437be3111248db7,

title = "Observation of time-dependent CP violation in B0→η′K0 decays and improved measurements of CP asymmetries in B0→φK0, KS0KS0KS0 and B0→J/ψK0 decays",

abstract = "We present improved measurements of CP-violation parameters in B0→K0, η′K0, KS0KS0KS0 decays based on a sample of 535×106 B{\=B} pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We obtain sin 2 1eff=+0.64±0.10(stat) ±0.04(syst) for B0→η′K0, +0.50±0.21(stat)±0. 06(syst) for B0→ K0, and +0.30±0.32(stat)±0.08(syst) for B0→KS0KS0KS0 decays. We have observed CP violation in the B0→η′K0 decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B0→J/ψK0 decays and obtain sin 2 1=+0.642±0.031(stat)±0.017(syst).",

author = "Chen, {K. F.} and K. Hara and M. Hazumi and T. Higuchi and K. Miyabayashi and Y. Nakahama and K. Sumisawa and O. Tajima and Y. Ushiroda and Y. Yusa and K. Abe and K. Abe and I. Adachi and H. Aihara and D. Anipko and K. Arinstein and V. Aulchenko and T. Aushev and T. Aziz and Bakich, {A. M.} and V. Balagura and S. Banerjee and E. Barberio and M. Barbero and A. Bay and K. Belous and U. Bitenc and I. Bizjak and S. Blyth and A. Bondar and A. Bozek and M. Bra{\v c}ko and J. Brodzicka and Browder, {T. E.} and P. Chang and Y. Chao and A. Chen and Chen, {W. T.} and Cheon, {B. G.} and R. Chistov and Choi, {S. K.} and Y. Choi and Choi, {Y. K.} and A. Chuvikov and S. Cole and J. Dalseno and M. Danilov and M. Dash and J. Dragic and A. Drutskoy and S. Eidelman and D. Epifanov and S. Fratina and A. Garmash and T. Gershon and A. Go and G. Gokhroo and P. Goldenzweig and B. Golob and H. Ha and J. Haba and T. Hara and K. Hayasaka and H. Hayashii and D. Heffernan and T. Hokuue and Y. Hoshi and S. Hou and Hou, {W. S.} and Hsiung, {Y. B.} and T. Iijima and K. Ikado and A. Imoto and K. Inami and A. Ishikawa and H. Ishino and R. Itoh and M. Iwasaki and Y. Iwasaki and H. Kakuno and Kang, {J. H.} and Kataoka, {S. U.} and N. Katayama and H. Kawai and T. Kawasaki and Khan, {H. R.} and H. Kichimi and Kim, {H. J.} and Kim, {S. K.} and Kim, {Y. J.} and K. Kinoshita and S. Korpar and P. Kri{\v z}an and P. Krokovny and R. Kulasiri and R. Kumar and Kuo, {C. C.} and A. Kusaka and A. Kuzmin and Kwon, {Y. J.} and G. Leder and J. Lee and Lee, {M. J.} and T. Lesiak and J. Li and A. Limosani and Lin, {S. W.} and Y. Liu and D. Liventsev and G. Majumder and F. Mandl and T. Matsumoto and A. Matyja and W. Mitaroff and H. Miyake and H. Miyata and Y. Miyazaki and R. Mizuk and D. Mohapatra and Moloney, {G. R.} and A. Murakami and T. Nagamine and Y. Nagasaka and I. Nakamura and E. Nakano and M. Nakao and Z. Natkaniec and S. Nishida and O. Nitoh and S. Noguchi and T. Nozaki and S. Ogawa and T. Ohshima and S. Okuno and Olsen, {S. L.} and Y. Onuki and W. Ostrowicz and H. Ozaki and P. Pakhlov and G. Pakhlova and H. Palka and H. Park and R. Pestotnik and Piilonen, {L. E.} and H. Sahoo and Y. Sakai and N. Satoyama and T. Schietinger and O. Schneider and J. Sch{\"u}mann and Schwartz, {A. J.} and R. Seidl and K. Senyo and Sevior, {M. E.} and M. Shapkin and H. Shibuya and B. Shwartz and Singh, {J. B.} and A. Sokolov and A. Somov and S. Stani{\v c} and M. Stari{\v c} and H. Stoeck and T. Sumiyoshi and S. Suzuki and F. Takasaki and K. Tamai and N. Tamura and M. Tanaka and Taylor, {G. N.} and Y. Teramoto and Tian, {X. C.} and K. Trabelsi and T. Tsuboyama and T. Tsukamoto and S. Uehara and T. Uglov and K. Ueno and Y. Unno and S. Uno and P. Urquijo and Y. Usov and G. Varner and Varvell, {K. E.} and S. Villa and Wang, {C. C.} and Wang, {C. H.} and Wang, {M. Z.} and Y. Watanabe and R. Wedd and E. Won and Xie, {Q. L.} and Yabsley, {B. D.} and A. Yamaguchi and Y. Yamashita and M. Yamauchi and Zhang, {C. C.} and Zhang, {Z. P.} and V. Zhilich and A. Zupanc",

year = "2007",

doi = "10.1103/PhysRevLett.98.031802",

language = "English",

volume = "98",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - Observation of time-dependent CP violation in B0→η′K0 decays and improved measurements of CP asymmetries in B0→φK0, KS0KS0KS0 and B0→J/ψK0 decays

AU - Chen, K. F.

AU - Hara, K.

AU - Hazumi, M.

AU - Higuchi, T.

AU - Miyabayashi, K.

AU - Nakahama, Y.

AU - Sumisawa, K.

AU - Tajima, O.

AU - Ushiroda, Y.

AU - Yusa, Y.

AU - Abe, K.

AU - Adachi, I.

AU - Aihara, H.

AU - Anipko, D.

AU - Arinstein, K.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Aziz, T.

AU - Bakich, A. M.

AU - Balagura, V.

AU - Banerjee, S.

AU - Barberio, E.

AU - Barbero, M.

AU - Bay, A.

AU - Belous, K.

AU - Bitenc, U.

AU - Bizjak, I.

AU - Blyth, S.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Brodzicka, J.

AU - Browder, T. E.

AU - Chang, P.

AU - Chao, Y.

AU - Chen, A.

AU - Chen, W. T.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Choi, S. K.

AU - Choi, Y.

AU - Choi, Y. K.

AU - Chuvikov, A.

AU - Cole, S.

AU - Dalseno, J.

AU - Danilov, M.

AU - Dash, M.

AU - Dragic, J.

AU - Drutskoy, A.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Fratina, S.

AU - Garmash, A.

AU - Gershon, T.

AU - Go, A.

AU - Gokhroo, G.

AU - Goldenzweig, P.

AU - Golob, B.

AU - Ha, H.

AU - Haba, J.

AU - Hara, T.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Heffernan, D.

AU - Hokuue, T.

AU - Hoshi, Y.

AU - Hou, S.

AU - Hou, W. S.

AU - Hsiung, Y. B.

AU - Iijima, T.

AU - Ikado, K.

AU - Imoto, A.

AU - Inami, K.

AU - Ishikawa, A.

AU - Ishino, H.

AU - Itoh, R.

AU - Iwasaki, M.

AU - Iwasaki, Y.

AU - Kakuno, H.

AU - Kang, J. H.

AU - Kataoka, S. U.

AU - Katayama, N.

AU - Kawai, H.

AU - Kawasaki, T.

AU - Khan, H. R.

AU - Kichimi, H.

AU - Kim, H. J.

AU - Kim, S. K.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Korpar, S.

AU - Križan, P.

AU - Krokovny, P.

AU - Kulasiri, R.

AU - Kumar, R.

AU - Kuo, C. C.

AU - Kusaka, A.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Leder, G.

AU - Lee, J.

AU - Lee, M. J.

AU - Lesiak, T.

AU - Li, J.

AU - Limosani, A.

AU - Lin, S. W.

AU - Liu, Y.

AU - Liventsev, D.

AU - Majumder, G.

AU - Mandl, F.

AU - Matsumoto, T.

AU - Matyja, A.

AU - Mitaroff, W.

AU - Miyake, H.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mizuk, R.

AU - Mohapatra, D.

AU - Moloney, G. R.

AU - Murakami, A.

AU - Nagamine, T.

AU - Nagasaka, Y.

AU - Nakamura, I.

AU - Nakano, E.

AU - Nakao, M.

AU - Natkaniec, Z.

AU - Nishida, S.

AU - Nitoh, O.

AU - Noguchi, S.

AU - Nozaki, T.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Onuki, Y.

AU - Ostrowicz, W.

AU - Ozaki, H.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Palka, H.

AU - Park, H.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Satoyama, N.

AU - Schietinger, T.

AU - Schneider, O.

AU - Schümann, J.

AU - Schwartz, A. J.

AU - Seidl, R.

AU - Senyo, K.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shibuya, H.

AU - Shwartz, B.

AU - Singh, J. B.

AU - Sokolov, A.

AU - Somov, A.

AU - Stanič, S.

AU - Starič, M.

AU - Stoeck, H.

AU - Sumiyoshi, T.

AU - Suzuki, S.

AU - Takasaki, F.

AU - Tamai, K.

AU - Tamura, N.

AU - Tanaka, M.

AU - Taylor, G. N.

AU - Teramoto, Y.

AU - Tian, X. C.

AU - Trabelsi, K.

AU - Tsuboyama, T.

AU - Tsukamoto, T.

AU - Uehara, S.

AU - Uglov, T.

AU - Ueno, K.

AU - Unno, Y.

AU - Uno, S.

AU - Urquijo, P.

AU - Usov, Y.

AU - Varner, G.

AU - Varvell, K. E.

AU - Villa, S.

AU - Wang, C. C.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Watanabe, Y.

AU - Wedd, R.

AU - Won, E.

AU - Xie, Q. L.

AU - Yabsley, B. D.

AU - Yamaguchi, A.

AU - Yamashita, Y.

AU - Yamauchi, M.

AU - Zhang, C. C.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zupanc, A.

PY - 2007

Y1 - 2007

N2 - We present improved measurements of CP-violation parameters in B0→K0, η′K0, KS0KS0KS0 decays based on a sample of 535×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We obtain sin 2 1eff=+0.64±0.10(stat) ±0.04(syst) for B0→η′K0, +0.50±0.21(stat)±0. 06(syst) for B0→ K0, and +0.30±0.32(stat)±0.08(syst) for B0→KS0KS0KS0 decays. We have observed CP violation in the B0→η′K0 decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B0→J/ψK0 decays and obtain sin 2 1=+0.642±0.031(stat)±0.017(syst).

AB - We present improved measurements of CP-violation parameters in B0→K0, η′K0, KS0KS0KS0 decays based on a sample of 535×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We obtain sin 2 1eff=+0.64±0.10(stat) ±0.04(syst) for B0→η′K0, +0.50±0.21(stat)±0. 06(syst) for B0→ K0, and +0.30±0.32(stat)±0.08(syst) for B0→KS0KS0KS0 decays. We have observed CP violation in the B0→η′K0 decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B0→J/ψK0 decays and obtain sin 2 1=+0.642±0.031(stat)±0.017(syst).

UR - http://www.scopus.com/inward/record.url?scp=33846351250&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.98.031802

DO - 10.1103/PhysRevLett.98.031802

M3 - Article

AN - SCOPUS:33846351250

SN - 0031-9007

VL - 98

JO - Physical Review Letters

JF - Physical Review Letters

IS - 3

M1 - 031802

ER -

Observation of time-dependent CP violation in B0→η′K0 decays and improved measurements of CP asymmetries in B0→φK0, KS0KS0KS0 and B0→J/ψK0 decays

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