AI Article Synopsis
- The study measures the top-quark mass using data from t ̄t events at the Fermilab Tevatron, specifically with a luminosity of 5.7 fb(-1) from p ̄p collisions at √s=1.96 TeV.
- The analysis focuses on events with large missing transverse energy and contains four to six jets, ensuring at least one b-tagged jet while excluding identified charged leptons.
- Utilizing a multidimensional template method, the researchers fit the data to signal and background templates to determine the top-quark mass as M(top)=172.32±2.4(stat)±1.0(syst) GeV/c(2).
Article Abstract
We present a measurement of the top-quark mass using a sample of t ̄t events in 5.7 fb(-1) of integrated luminosity from p ̄p collisions at the Fermilab Tevatron with √s=1.96 TeV and collected by the CDF II Detector. We select events having large missing transverse energy, and four, five, or six jets with at least one jet tagged as coming from a b quark, and reject events with identified charged leptons. This analysis considers events from the semileptonic t ̄t decay channel, including events that contain tau leptons. The measurement is based on a multidimensional template method. We fit the data to signal templates of varying top-quark masses and background templates, and measure a top-quark mass of M(top)=172.32±2.4(stat)±1.0(syst) GeV/c(2).
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| http://dx.doi.org/10.1103/PhysRevLett.107.232002 | DOI Listing |
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