Study of B0 -> \bar{D}(*)0 pi+ pi- decays

TL;DR

This study analyzes neutral B meson decays to D0 pi+ pi- and D*0 pi+ pi- final states, identifying contributions from various intermediate resonant states using data from the Belle experiment.

Contribution

It provides the first detailed analysis of B0 decays to these specific multi-body final states, including contributions from narrow D** states and other resonances.

Findings

Identification of contributions from D**(j_q=3/2) states.

Observation of B→D(*)ρ, D(*)f2, D(*)σ decay modes.

Preliminary results based on large Belle data sample.

Abstract

We report the results of a study of neutral B decays to the $D^0 \pi^+ \pi^-$ and $D^{*0} \pi^+ \pi^-$ final states using complete $D^{(*)0}$ reconstruction. The contributions from two-body $B\to D^{**} \pi$ with narrow ($j_q=3/2$) $D^{**}$ states and $B\to D^{(*)}\rho, D^{(*)} f_2, D^{(*)}\sigma$ decays have been determined. All results are preliminary, and are based on a large data sample collected in the Belle experiment at the KEKB $e^+e^-$ collider.