Branching Fraction and CP Asymmetry Measurements in Inclusive B -> Xs l+l- and B -> Xs gamma Decays from BABAR

TL;DR

This paper reports updated measurements of branching fractions and CP asymmetries in inclusive B meson decays involving Xs, l+l-, and gamma, providing new constraints on theoretical parameters and CP violation.

Contribution

It offers the first measurement of the CP asymmetry difference between charged and neutral B -> Xs gamma decays, constraining Wilson coefficient ratios.

Findings

First measurement of CP asymmetry difference in B -> Xs gamma decays

Updated branching fractions and CP asymmetries for B -> Xs l+l- and gamma decays

New constraint on Im(C8/C7) ratio

Abstract

We present an update on total and partial branching fractions and on CP asymmetries in the semi-inclusive decay B -> Xs l+l-. Further, we summarize our results on branching fractions and CP asymmetries for semi-inclusive and fully-inclusive B -> Xs gamma decays. We present the first result on the CP asymmetry difference of charged and neutral B -> Xs gamma$ decays yielding the first constraint on the ratio of Wilson coefficients Im (C8/C7).