Measurements of the Branching Fraction and Time-Dependent CP-Asymmetries of B0->J/Psi pi0 Decays

TL;DR

This paper reports measurements of the branching fraction and time-dependent CP asymmetries in B0->J/Psi pi0 decays using data from the BaBar detector, providing insights into CP violation in B meson decays.

Contribution

First measurement of the branching fraction and CP asymmetry parameters for B0->J/Psi pi0 decays with a large data sample from BaBar.

Findings

Branching fraction B(B0->J/Psi pi0) = (1.94 +/- 0.22 +/- 0.17) x 10^-5

CP asymmetry parameter C = -0.21 +/- 0.26 +/- 0.09

CP asymmetry parameter S = -0.68 +/- 0.30 +/- 0.04

Abstract

We present measurements of the branching fraction and time-dependent CP asymmetries in B0->J/Psi pi0 decays based on (231.8 +/- 2.6)*10^6 Upsilon(4S) -> BBbar decays collected with the BaBar detector at the PEP-II asymmetric-energy B factory at SLAC during the years 1999-2004. We obtain a branching fraction B(B0->J/Psi pi0) = (1.94 +/- 0.22 (stat) +/- 0.17 (syst))*10^-5. We also measure the CP asymmetry parameters C = -0.21 +/- 0.26 (stat) +/- 0.09 (syst) and S = -0.68 +/- 0.30 (stat) +/- 0.04 (syst). All results presented in this paper are preliminary.