Measurement of the CKM angles alpha and gamma at the BaBar experiment

TL;DR

This paper reports measurements of the CKM angles alpha and gamma using various B meson decay modes at BaBar, providing new constraints on the Standard Model's CP violation parameters.

Contribution

First measurements of time-dependent CP asymmetries in B0 -> a1+(1260) pi- and gamma in B+ -> D(*)0 K+ decays using Dalitz analysis.

Findings

Constraints on alpha from multiple decay channels

First measurement of CP asymmetries in B0 -> a1+(1260) pi-

Gamma measurement via Dalitz analysis in B+ decays

Abstract

We present recent measurements of the CKM angles alpha and gamma using data collected by the BaBar detector at the PEP-II asymmetric-energy e+ e- collider at the Stanford Linear Accelerator Center. In addition to constraints on alpha from the decays B0 -> pi+ pi-, B0 -> rho+ pi- and B0 -> rho+ rho-, we also report the first measurement of time-dependent CP asymmetries in the decay B0 -> a1+(1260) pi-. We present measurements of gamma in B+ -> D(*)0 K+ decays using a Dalitz analysis in the modes D^0 -> Ks pi+ pi- and D^0 -> pi+ pi- pi0.