Top-quark mass measurements using jet rates at LHC

Abstract

This work presents a new method to measure the top-quark mass in hadronic collisions[1]. The method uses the sensitivity of the tt¯+1$tar t + 1$-jet production on the top-quark mass. In detail we study the ℛ distribution defined as the tt¯+1$tar t + 1$-jet normalized cross section differential in the invariant mass of the total system and calculated at NLO accuracy. We prove that the ℛ distribution has a high sensitivity to the top-quark mass. Furthermore we investigate and quantify the impact of the dominant theoretical and experimental uncertainties. The results obtained show, that the method has the potential to be competitive in precision with established approaches and allows a complementary measurement of the top-quark mass at hadron colliders. We emphasize that in the proposed method the mass parameter is uniquely defined through one-loop renormalization.