Centrality and rapidity dependence of inclusive pion and prompt photon   production in p+Pb collisions at the LHC with EPS09s nPDFs
  The centrality dependencies of the inclusive neutral pion and prompt photon nuclear modification factors for p+Pb collisions at the LHC are studied using a spatially dependent set of nuclear PDFs, EPS09s. The calculations are performed at mid- and forward rapidities searching for an observable which would optimally probe the spatial dependence of the nuclear PDFs. In addition, we discuss to which $x$ values of the nucleus the different observables are sensitive. 
Ilkka Helenius, Kari J. Eskola, Hannu Paukkunen
hep-ph nucl-th