Improved measurement of time-dependent CP violation in B0 -> J/Psi pi0 decays

Details Improved measurement of time-dependent CP violation in B0 -> J/Psi pi0 decays Improved measurement of time-dependent CP violation in B0 -> J/Psi pi0 decays

2007-08-02

arxiv.org/abs/0708.0304v3

Phys.Rev.D77:071101,2008

Physics

High Energy Physics

High Energy Physics - Experiment

Resubmitted to PRD(RC), including 4 figures, 6pages Revision has been made according to communication with PRD referees

Scientific paper

10.1103/PhysRevD.77.071101

We report improved measurements of time-dependent CP violation parameters for $B^0(\bar{B}^0) \to J/\psi \pi^0$ decay. This analysis is based on 535 million $B\bar{B}$ pairs accumulated at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters $\mathcal{S}_{J/\psi \pi^0} = -0.65\pm0.21 (\rm{stat})\pm0.05 (\rm{syst})$ and $\mathcal{A}_{J/\psi \pi^0} = +0.08\pm0.16 (\rm{stat})\pm0.05 (\rm{syst})$, which are consistent with Standard Model expectations.

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