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The Forward-Backward Asymmetry (AFB) in Z' physics is commonly only perceivedas the observable which possibly allows one to interpret a Z' signal bydistinguishing different models of such (heavy) spin-1 bosons. In this paper,we examine the potential of AFB in setting bounds on or even discovering a Z'boson at the Large Hadron Collider (LHC) and show that it might be a powerfultool for this purpose. We analyse two different scenarios: Z' bosons with anarrow and wide width, respectively. We find that, in the first case, thesignificance of the AFB search can be comparable with that of the bump searchusually adopted by the experimental collaborations; however, being a ratio of(differential) cross sections the AFB has the advantage of reducingsystematical errors. In the second case, the AFB search can win over the bumpsearch in terms of event shape, as the structure of the AFB distribution as afunction of the invariant mass of the reconstructed Z'boson could nail down thenew broad resonance much better than the event counting strategy usuallyadopted in such cases.

Forward-Backward Asymmetry as a Discovery Tool for Z' Bosons at the LHC