Muon veto system and backgrounds of the DayaBay experiment

The DayaBay reactor neutrino experiment aims to measure the last unknown neutrino mixing angle $\theta_{13}$. To reach our goal sensitivity of $\sin^22\theta_{13}<0.01$ we must identify and veto cosmic ray induced backgrounds at each of our three detector sites. The DayaBay experiment combines a water Cherenkov detector with RPCs to tag muons with an overall efficiency exceeding 99.5\%. This talk will provide an overview of the DayaBay muon veto system and potential cosmic ray induced backgrounds.