BABAR Measurements on B->K(*)l+l- Rates and Rate Asymmetries

TL;DR

This paper reports detailed measurements of rare B meson decays to K(*)l+l-, including branching fractions and asymmetries, using a large dataset, and finds results consistent with Standard Model predictions.

Contribution

First comprehensive set of measurements on B->K(*)l+l- decay rates and asymmetries with high-statistics data from BABAR, providing important tests of the Standard Model.

Findings

Results agree with Standard Model predictions

Measured isospin and CP asymmetries are consistent with previous experiments

Branching fractions are precisely determined across di-lepton mass bins

Abstract

Based on 471 million BB pairs collected with the BABAR detector at the PEP-II e+e- collider, we perform a series of measurements on rare decays B->K(*)l+l-, where l+l- is either e+e- or mu+mu-. The measurements include total branching fractions, and partial branching fractions in six bins of di-lepton mass-squared. We also measure isospin asymmetries in the same six bins. Furthermore, we measure direct CP and lepton flavor asymmetries for di-lepton mass below and above the J/Psi resonance. Our measurements show good agreement with both Standard Model predictions and measurements from other experiments.