# A Study of Time-Dependent $CP$ Asymmetry in $B^0 \rightarrow J/\psi\pi^0$ Decays

Abstract : We present our first study of the time-dependent CP-violating asymmetry in B0 --> J/psi pi0 decays using e^+e^- annihilation data collected with the BABAR detector at the Y(4S) resonance during the years 1999--2002 at the PEP-II asymmetric-energy B Factory at SLAC. With about 88 million B Bbar pairs, our preliminary results for the coefficients of the cosine and sine terms of the CP asymmetry are C_{J/psi pi0} = 0.38 +/- 0.41 (stat) +/- 0.09 (syst) and S_{J/psi pi0} = 0.05 +/- 0.49 (stat) +/- 0.16 (syst).
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00012432
Contributor : Claudine Bombar <>
Submitted on : Tuesday, January 14, 2003 - 5:23:25 PM
Last modification on : Wednesday, January 6, 2021 - 6:22:02 PM

### Citation

B. Aubert, D. Boutigny, J.M. Gaillard, A. Hicheur, Y. Karyotakis, et al.. A Study of Time-Dependent $CP$ Asymmetry in $B^0 \rightarrow J/\psi\pi^0$ Decays. International Conference on High Energy Physics 31 ICHEP 2002, Jul 2002, Amsterdam, Netherlands. pp.1-17. ⟨in2p3-00012432⟩

Record views