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Measurement of CP asymmetries in B-0 -> K-0 pi(0) decays

Authors
Fujikawa, M.Yusa, Y.Dalseno, J.Hazumi, M.Sumisawa, K.Aihara, H.Arinstein, K.Aulchenko, V.Aushev, T.Aziz, T.Bakich, A. M.Balagura, V.Barberio, E.Belous, K.Bhardwaj, V.Bischofberger, M.Bondar, A.Bozek, A.Bracko, M.Browder, T. E.Chao, Y.Chen, A.Cheon, B. G.Choi, S. -K.Choi, Y.Dungel, W.Eidelman, S.Feindt, M.Goldenzweig, P.Ha, H.Haba, J.Han, B. -Y.Hara, K.Hasegawa, Y.Hayasaka, K.Hayashii, H.Horii, Y.Hoshi, Y.Hou, W. -S.Hyun, H. J.Iijima, T.Inami, K.Ishino, H.Itoh, R.Iwasaki, M.Iwasaki, Y.Julius, T.Kang, J. H.Kawai, H.Kiesling, C.Kim, H. O.Kim, S. K.Kim, Y. I.Kim, Y. J.Kinoshita, K.Ko, B. R.Korpar, S.Kreps, M.Krokovny, P.Kuhr, T.Kumar, R.Kumita, T.Kwon, Y. -J.Kyeong, S. -H.Lee, S. -H.Li, J.Liu, C.Liventsev, D.Louvot, R.McOnie, S.Miyabayashi, K.Miyata, H.Miyazaki, Y.Mori, T.Nagasaka, Y.Nakano, E.Nakao, M.Nishida, S.Nishimura, K.Nitoh, O.Nozaki, T.Ohshima, T.Okuno, S.Olsen, S. L.Ozaki, H.Pakhlov, P.Pakhlova, G.Park, C. W.Park, H.Park, H. K.Pestotnik, R.Piilonen, L. E.Rozanska, M.Sakai, Y.Schneider, O.Schwartz, A. J.Senyo, K.Shapkin, M.Shebalin, V.Shen, C. P.Shiu, J. -G.Singh, J. B.Sokolov, A.Solovieva, E.Stanic, S.Staric, M.Sumiyoshi, T.Taylor, G. N.Teramoto, Y.Trabelsi, K.Uehara, S.Unno, Y.Uno, S.Urquijo, P.Usov, Y.Varner, G.Vervink, K.Vinokurova, A.Wang, C. H.Wang, P.Watanabe, Y.Wedd, R.Won, E.Yabsley, B. D.Yamashita, Y.Zhang, C. C.Zhang, Z. P.Zupanc, A.
Issue Date
Jan-2010
Publisher
American Physical Society
Citation
Physical Review D - Particles, Fields, Gravitation and Cosmology, v.81, no.1, pp 1 - 7
Pages
7
Indexed
SCI
SCIE
SCOPUS
Journal Title
Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume
81
Number
1
Start Page
1
End Page
7
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/193915
DOI
10.1103/PhysRevD.81.011101
ISSN
1550-7998
1550-2368
Abstract
We report measurements of CP violation parameters in B-0 -> K-0 pi(0) decays based on a data sample of 657 X 10(6)B (B) over bar pairs collected with the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. We use B-0 -> K-S(0)pi(0) decays for both mixing-induced and direct CP violating asymmetry measurements and B-0 -> K-L(0)pi(0) decays for the direct CP violation measurement. The CP violation parameters obtained are sin2 phi(eff)(1) - +0.67 +/- 0.31(stat) +/- 0.08(syst) and A(K0 pi 0) - +0.14 +/- 0.13(stat) +/- 0.06(syst). The branching fraction of B-0 -> K-0 pi(0) decay is measured to be B(B-0 -> K-0 pi(0)) - (8.7 +/- 0.5(stat) +/- 0.6(syst)) X 10(-6). The observed A(K0 pi 0) value differs by 1.9 standard deviations from the value expected from an isospin sum rule.
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