Top mass shift resulting from the recalibration of flavor-dependent jet energy corrections in the D{\O} lepton+jets top mass measurement

Abstract

We review the possible effects of the miscalibration of the flavor-dependent Jet Energy Corrections ($F_{\mathrm{Corr}}$) on the D{\O} lepton+jets top mass measurement. The work is based on a previous study, where the D{\O} $F_{\mathrm{Corr}}$ calibration procedure was repeated based on the release of the internal D{\O} notes after a 5-year moratorium. The cited study was motivated by the extraordinary precision claimed by D{\O} in their top mass measurement. Using a Pythia6-based $F_{\mathrm{Corr}}$ recalibration, the $m_t$ result was shifted from 174.95 to 173.16 GeV. Moreover, utilizing a Herwig7-based $F_{\mathrm{Corr}}$ calibration (not accounted for in D{\O} studies), a shift down to 171.84 GeV was observed. We find this both convincing and specific evidence for re-reviewing a part of the $F_{\mathrm{Corr}}$ calibration process. However, D{\O} has been unwilling to open such studies or to provide other convincing counter-evidence.