Measurement of the $B \to X_s \gamma$ branching fraction and photon energy

We present a measurement of the branching fraction and photon energy spectrum for the decay $B \to X_s \gamma$. This measurement uses approximately 750,000 $B\bar{B}$ events that are tagged by a fully reconstructed hadronic decay of one of the $B$ mesons. In the decay of the second $B$ meson an isolated high energy photon is identified. The small contribution from $B \to X_d\gamma$ is subtracted using theoretical predictions. The full reconstruction of one of the $B$ mesons results in improved background suppression and allows for an inclusive measurement of the photon energy spectrum in the $B$ rest frame. From the measured spectrum we calculate the first and second moments for different minimum photon energies and use them to extract the heavy quark parameters $m_b$ and $\mu_{\pi}^2$. In addition, a measurement of the direct $CP$ asymmetry $A_{CP}(B \to X_{s+d} \gamma)$ is presented.