Phi_2 (alpha) measurement using B -> rho pi decays at Belle

TL;DR

This paper reports on measurements of time-dependent asymmetries in neutral B meson decays to rho+ pi- using data from the Belle detector, providing insights into CP violation.

Contribution

First measurement of time-dependent CP asymmetries in B0 -> rho+ pi- decays at Belle, enhancing understanding of CP violation in B mesons.

Findings

Measured CP asymmetries in B0 -> rho+ pi- decays.

Data supports Standard Model predictions of CP violation.

Provides constraints on the CKM angle phi_2.

Abstract

We present measurements of time-dependent asymmetries in decays of neutral B mesons to the final states B0 -> rho+ pi-. Measurements are based on a 140 fb-1 data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.