Top pair invariant mass distribution: A window on new physics

Abstract

We explore in detail the physics potential of a measurement of the t invariant mass distribution. First, we assess the accuracy of the best available predictions for this observable and find that in the low invariant mass region, the shape is very well predicted and could be used to perform a top mass measurement. Second, we study the effects of a heavy s-channel resonance on the t invariant mass distribution in a model independent way. We provide the necessary Monte Carlo tools to perform the search and outline a simple three-step analysis. © 2009 SISSA.