Penguin and rare decays in BaBar

TL;DR

This paper reports on recent BaBar results concerning rare B meson decays, including measurements of CP asymmetries and branching fractions, aiming to explore potential new physics beyond the Standard Model.

Contribution

It provides new experimental measurements of CP asymmetries and branching fractions in radiative B decays, enhancing the understanding of flavor physics and constraints on new physics models.

Findings

Measured time-dependent CP asymmetry in B^0 → K_S^0 π^− π^+ γ decays.

Determined direct CP asymmetries in B → X_s γ and B → X_s ℓ^+ ℓ^− decays.

Reported branching fractions for inclusive radiative B decays.

Abstract

We present recent results from the \babar Collaboration on radiative decays. These include searches for new physics via measurements of several observables such as the time-dependent $CP$ asymmetry in $B^0 \to K^0_S \pi^- \pi^+ \gamma$ exclusive decays, as well as direct $CP$ asymmetries and branching fractions in $B \to X_s \gamma$ and $B \to X_s \ell^+ \ell^-$ inclusive decays.