@article{90a0f9bd6e974095a37cdcbc02461571,
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 D. Marlow",
year = "2001",
month = aug,
day = "27",
doi = "10.1103/PhysRevLett.87.091802",
language = "English (US)",
volume = "87",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "9",
}