Forward–backward asymmetry of Drell–Yan lepton pairs in pp collisions at ... formula ...... formula ...

摘要

A measurement of the forward–backward asymmetry AFB of oppositely charged lepton pairs (μμ and ee) produced via Z/γ^∗ boson exchange in pp collisions at s=8 TeV is presented. The data sample corresponds to an integrated luminosity of 19.7 fb^-1 collected with the CMS detector at the LHC. The measurement of AFB is performed for dilepton masses between 40 GeV and 2 TeV and for dilepton rapidity up to 5. The AFB measurements as a function of dilepton mass and rapidity are compared with the standard model predictions.