Continuum components in dilepton mass spectrum in Pb+Pb collisions at √sNN = 2.76 TeV

The heavy ion collisions are performed to study the interaction of matter at extreme temperatures and densities where it is expected to be in the form of Quark Gluon Plasma (QGP), a state where color degrees of freedom are dominant. One of the most striking signal of QGP is the suppression of quarkonium both for charmonia and bottomonia measured through their decays in dilepton channels. The dilepton invariant mass spectrum is also sensitive to many different sources. In the present study, the production cross section for charm and beauty quark pairs using pQCD up to next to leading order (NLO) and their contributions to dileptons for Pb+Pb collisions at √sNN 2.76 TeV have been calculated. The dileptons coming from QGP and hadron phases are calculated using thermal model and DY using pythia. The relative contribution of different sources have been estimated employing Monte Carlo methods and have been studied in different kinematical ranges relevant for detectors used at LHC