Observation of CP violation in the B(0) meson system.
By B. Aubert, D. Boutigny, J. Gaillard, A. Hicheur, Y. Karyotakis, J. Lees, P. Robbe, V. Tisserand, A. Palano, G. Chen and 489 more. 2001
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Author(s): Aubert, B; Boutigny, D; Gaillard, JM; Hicheur, A; Karyotakis, Y; Lees, JP; Robbe, P; Tisserand, V; Palano, A; Chen, GP; Chen, JC; Qi, ND; Rong, G; Wang, P; Zhu, YS; Eigen, G; Reinertsen, PL; Stugu, B; Abbott, B; Abrams, GS; Borgland, AW; Breon, AB; Brown, DN; Button-Shafer, J; Cahn, RN; Clark, AR; Gill, MS; Gritsan, AV; Groysman, Y; Jacobsen, RG; Kadel, RW; Kadyk, J; Kerth, LT; Kluth, S; Kolomensky, YG; Kral, JF; LeClerc, C; Levi, ME; Liu, T; Lynch, G; Meyer, AB; Momayezi, M; Oddone, PJ; Perazzo, A; Pripstein, M; Roe, NA; Romosan, A; Ronan, MT; Shelkov, VG; Telnov, AV; Wenzel, WA; Zisman, MS; Bright-Thomas, PG; Harrison, TJ; Hawkes, CM; Knowles, DJ; O'Neale, SW; Penny, RC; Watson, AT; Watson, NK; Deppermann, T; Goetzen, K; Koch, H; Krug, J; Kunze, M; Lewandowski, B; Peters, K; Schmuecker, H; Steinke, M; Andress, JC; Barlow, NR; Bhimji, W; Chevalier, N; Clark, PJ; Cottingham, WN; De Groot, N; Dyce, N; Foster, B; McFall, JD; Wallom, D; Wilson, FF; Abe, K; Hearty, C; Mattison, TS; McKenna, JA | Abstract: We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of γ(4S)decays collected in 2001, bringing the data available to 32 ×106BB¯We select events in which one neutral B meson is fully reconstructed in a final state containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2β, is derived from the decay time distributions in such events. The result sin2β=0.59 ± 0.14(stat)±0.05(syst) establishes CP violation in the B0meson system. We also determine |λ|= 0.93±0.09(stat)±0.03(syst), consistent with no direct CP violation. © 2001 The American Physical Society.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/5b5b04df1d0c16e871b9728999db8dedf7180752
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In Nuclear and High Energy Physics
Citations in the corpus
- Oscillations of neutrinos and mesons in quantum field theory (2001, methodology): “The most accurate measurements are by the BABAR [139] and Belle [140] collaborations:”
- Physics at Super B Factory (2004, methodology): “In the summer of 2001 the presence of CP violation in the B meson system was established by the Belle collaboration [3,4,5,6] (and simultaneously by the BaBar collaboration [7,8,9,10]) through the measurement of the time dependent asymmetry in the decay process B0(B̄0) → J/ψK0 S .”