Recent Results on Radiative and Electroweak Penguin Decays of B Mesons at BaBar

TL;DR

This paper reports recent BaBar measurements of radiative and electroweak penguin B meson decays, providing constraints on new physics beyond the Standard Model through various decay rate and asymmetry analyses.

Contribution

It presents new experimental results on B meson decay processes, including branching fractions and CP asymmetries, and discusses their implications for new physics constraints.

Findings

No evidence for new physics was observed.

Measured branching fractions and CP asymmetries are consistent with Standard Model predictions.

Constraints on new physics models are derived from the results.

Abstract

Radiative and electroweak decays of B mesong (B to X_{s(d)}{\gamma} and B to X_{s(d)}\ell\ell, respectively, where X is a hadronic system and s or d labels the underlying quark process b to s(d)\gamma) provide good places to search for new physics (NP) beyond the standard model. Recent BaBar measurements are reported: inclusive BF(B to X_s \gamma), direct CP asymmetry for inclusive X_s {\gamma} and X_{s+d} {\gamma}, and searches for the rare decays B to \pi(\eta)\ell\ell. No evidence for NP was found, but several constraints are discussed.