  The bottomonium states due to their varying binding energies dissolve at
different temperatures and thus their nuclear modification factors and relative
yields have potential to map the properties of Quark Gluon Plasma (QGP). We
estimate the suppression of bottomonia states due to color screening in an
expanding QGP of finite lifetime and size with the conditions relevant for PbPb
collisions at LHC. The properties of $\Upsilon$ states and recent results on
their dissociation temperatures have been used as ingredient in the study. The
nuclear modification factors and the ratios of yields of $\Upsilon$ states are
then obtained as a function of transverse momentum and centrality. We compare
our theoretical calculations with the bottomonia yields measured with CMS in
PbPb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV. The model calculations
explain the data very well.
