Open-beauty production in $p$Pb collisions at $\sqrt{s_{NN}}$=5 TeV:   effect of the gluon nuclear densities
  We present our results on open beauty production in proton-nucleus collisions for the recent LHC $p$Pb run at $\sqrt{s_{NN}}$=5 TeV. We have analysed the effect of the modification of the gluon PDFs in nucleus at the level of the nuclear modification factor. Because of the absence of measurement in $pp$ collisions at the same energy, we also propose the study of the forward-to-backward yield ratio in which the unknown proton-proton yield cancel. Our results are compared with the data obtained by LHCb collaboration and show a good agreement. 
Z. Conesa del Valle, E. G. Ferreiro, F. Fleuret, J.P. Lansberg, A.   Rakotozafindrabe
hep-ph