Study of B- => D**0 pi-(D**0 => D(*)+ pi-) decays

TL;DR

This study investigates B meson decays into D** pi final states, measuring properties of four D** states, including the first observation of broad D*0_0 and D'0_1 mesons, using data from the Belle experiment.

Contribution

First measurement of masses and widths of four D** states, including the discovery of broad D*0_0 and D'0_1 mesons in B decays.

Findings

Measured masses and widths of four D** states.

First observation of broad D*0_0 and D'0_1 mesons.

Quantified contributions of narrow and broad D** states in B decays.

Abstract

We report the results of a study of charged B decays to the D+- pi-+ pi-+ and D*+- pi-+ pi-+ final states using complete D(*) reconstruction. The contributions of two-body B => D** pi decays with narrow (j=3/2) and broad (j=1/2) D** states have been determined and the masses and widths of four D** states have been measured. This is the first observation of the broad D*0_0 and D'0_1 mesons. The analysis is based on a data sample of 65 million B barB pairs collected in the Belle experiment.