Measurement of the Top Quark Mass Using the Invariant Mass of Lepton Pairs in Soft Muon b-tagged Events

Abstract

We present the first measurement of the mass of the top quark in a sample of $t\bar{t}\to \ell \bar{\nu }b\bar{b}q\bar{q}$ events (where $\ell =e$, $\mu$) selected by identifying jets containing a muon candidate from the semileptonic decay of heavy-flavor hadrons (soft muon $b$-tagging). The $p\bar{p}$ collision data used corresponds to an integrated luminosity of 2 fb${}^{-1}$ and was collected by the CDF II detector at the Fermilab Tevatron. The measurement is based on a novel technique exploiting the invariant mass of a subset of the decay particles, specifically the lepton from the $W$ boson of the $t\to Wb$ decay, and the muon from a semileptonic $b$ decay. We fit template histograms, derived from simulation of $t\bar{t}$ events and a modeling of the background, to the mass distribution observed in the data and measure a top quark mass of $180.5\pm 12.0(stat.)\pm 3.6(syst.)\mathrm{GeV}/c^2$, consistent with the current world average.

submitted to Phys. Rev. D (R)

References in corpus (1)

• Measurement of the $\ttbar$ Production Cross Section in 2 fb${}^{-1}$ of $\ppbar$ Collisions at $\sqrt{s}=1.96$ TeV Using Lepton Plus Jets Events with Soft Muon b-Tagging

Cited by in corpus (8)

• A homoclinic route to asymptotic full cooperation in adaptive networks and its failure
• Fragmentation Uncertainties in Hadronic Observables for Top-quark Mass Measurements
• A Phenomenological Study of Bottom Quark Fragmentation in Top Quark Decay
• Precision measurements of the top quark mass from the Tevatron in the pre-LHC era
• Top Quark Physics at the Tevatron
• Higgs mediated Double Flavor Violating top decays in Effective Theories
• Boosted top tagging and its interpretation using Shapley values
• Top Quark Physics at the Tevatron