Forward Physics with ATLAS

An overview of the latest results of physical measurements in the forward region (|eta|>3) using the ATLAS detector at the LHC is presented. The data used comprise the 2010 proton-proton data taken at sqrt(s)=7TeV by ATLAS at low luminosity and with low pile-up contamination. In particular, the measurement of (forward) rapidity gap differential cross section as function of the rapidity gap size, the inclusive forward jet cross section, the total forward energy and the energy density flow measured with the ATLAS Forward Calorimeter (FCAL) are discussed. The main results and the conclusions of the comparison with theoretical models incorporated in montecarlo event generators is drawn. Performance results of the Zero Degree Calorimeter (ZDC) detector in pp and in HI collisions are shown and the potential of this detector to tag forward going neutrons produced in Ultraperipheral collisions (UPCs) in ion-ion and ion-proton interactions is shown.