# $\Bz\to\pip\pim\piz$ Time Dependent Dalitz analysis at BaBar

## TL;DR

This paper reports a time-dependent Dalitz analysis of neutral B meson decays to three pions, using BaBar data, finding no significant CP violation and constraining the weak angle alpha.

## Contribution

First time-dependent Dalitz analysis of $B^0 o
ho o \pi ext{pions}$ decays at BaBar, providing constraints on the weak angle alpha.

## Key findings

- No significant CP violation observed.
- 68% confidence interval on alpha: [75°, 152°].
- Analysis based on 346 million B meson pairs.

## Abstract

I present here results of a time-dependent analysis of the Dalitz structure of neutral $B$ meson decays to $\pip\pim\piz$ from a dataset of 346 million $B \bar B$ pairs collected at the $\Upsilon(4S)$ center of mass energy by the BaBar detector at the SLAC PEP-II $e^+e^-$ accelerator. No significant CP violation effects are observed and 68% confidence interval is derived on the weak angle $\alpha$ to be [75$^o$,152$^o$]