1206.3921 (CMS Collaboration)

Search for charge-asymmetric production of W' bosons in top pair + jet
events from pp collisions at sqrt(s) = 7 TeV    [PDF]

CMS Collaboration

A search is presented for charge-asymmetric production of a W' boson that has been proposed to accommodate the forward-backward asymmetry observed in the production of top-antitop quark pairs at the Tevatron. The new heavy W' boson would be produced in association with a top quark and would decay into top and down quarks. The data correspond to an integrated luminosity of 5.0 inverse femtobarns in pp collisions at a center-of-mass energy of 7 TeV, recorded by the CMS detector at the LHC. No significant excess above the standard model expectations is observed, and, from a combination of the electron-plus-jets and muon-plus-jets channels, a lower limit of 840 GeV is set on the W' boson mass at the 95% confidence level.

View original: http://arxiv.org/abs/1206.3921