Recent ATLAS results in the field of meson physics

Recent results on flavor physics are presented, using data from the ATLAS detector. The $\Upsilon(nS)$ and charmonium inclusive production cross-sections are discussed. $J/\Psi$ production associated with a $W$ vector boson is presented. An inclusive analysis of the $B(u)$ meson production is shown. Results on the production of heavy quarkonia are complemented by the measurement of inclusive phi meson production. The latest information on heavy flavor spectroscopy and searches for new physics using $b$-meson rare decays is also covered. These results are based on data samples collected during the 2011 and 2012 LHC running periods.