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Abstract: It is anticipated that a number of techniques to measure the top quark massat the LHC will yield m top with uncertainties of about 0.5-1 percent. Theseuncertainties are mostly theoretical; they are usually estimated using partonshower Monte Carlo programs whose reliability at this level of precision isdifficult to assess. The goal of this paper is to contrast those estimates withthe results of NLO QCD computations for a few observables, often discussed inthe context of high-precision top quark mass measurements at the LHC. Inparticular, we study the NLO QCD corrections to the invariant mass distributionof a charged lepton and a B-meson in lepton+jets channels. In the dileptonchannel we investigate the invariant mass distribution of a charged lepton anda b-jet, the average energy of the two leptons and the average energy of theb-jets from top decays.



Author: Sandip Biswas, Kirill Melnikov, Markus Schulze

Source: https://arxiv.org/







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