@article{5b2b3272e7af47b68bdbf945eec90682,
title = "Observation of large CP violation in the neutral B meson system",
abstract = "We present a measurement of the standard model CP violation parameter sin2ϕ1 based on a 29.1 fb−1 data sample collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. One neutral B meson is fully reconstructed as a J/ψKS, ψ(2S)KS, χc1KS, ηcKS, J/ψKL, or J/ψK*0 decay and the flavor of the accompanying B meson is identified from its decay products. From the asymmetry in the distribution of the time intervals between the two B meson decay points, we determine sin2ϕ1=0.99±0.14(stat)±0.06(syst). We conclude that we have observed CP violation in the neutral B meson system.",
author = "{Belle Collaboration} and K. Abe and K. Abe and R. Abe and I. Adachi and Ahn, {Byoung Sup} and H. Aihara and M. Akatsu and G. Alimonti and K. Asai and M. Asai and Y. Asano and T. Aso and V. Aulchenko and T. Aushev and Bakich, {A. M.} and E. Banas and S. Behari and Behera, {P. K.} and D. Beiline and A. Bondar and A. Bozek and Browder, {T. E.} and Casey, {B. C.K.} and P. Chang and Y. Chao and Chen, {K. F.} and Cheon, {B. G.} and R. Chistov and Choi, {S. K.} and Y. Choi and Dong, {L. Y.} and J. Dragic and A. Drutskoy and S. Eidelman and V. Eiges and Y. Enari and R. Enomoto and Everton, {C. W.} and F. Fang and H. Fujii and C. Fukunaga and M. Fukushima and N. Gabyshev and A. Garmash and Gershon, {T. J.} and A. Gordon and K. Gotow and H. Guler and R. Guo and H. Ishino",
year = "2001",
month = aug,
day = "27",
doi = "10.1103/PhysRevLett.87.091802",
language = "English",
volume = "87",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "9",
}