B hadron production and decay at ATLAS

Selected recent B-physics results published by the ATLAS experiment at the LHC are presented. The parity-violating decay asymmetry parameter, $\alpha_b$, is measured to be $0.30 \pm 0.16 (\textrm{stat}) \pm 0.06 (\textrm{syst})$. A new excited state of the $B_c^{\pm}$ meson is observed with a mass $6842 \pm 4(\textrm{stat}) \pm 5(\textrm{syst})$ MeV, consistent with expectations for the second $S$-wave state of the $B_c^{\pm}$ meson, $B_c^{\pm}(2S)$.