Measurement of the top quark mass at CDF using the "neutrino phi weighting" template method on a lepton plus isolated track sample
Name
Aaltonen-2009-Measurement of the T.pdf
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Author(s)
Choudalakis, Georgios
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Hahn, Kristian Allan
Henderson, C.
Knuteson, Bruce O.
Paus, Christoph M. E.
Xie, Si
Makhoul, Khaldoun
Bauer, Gerry P
Date Issued
April 2009
Journal
Physical Review D
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Measurement of the top quark mass at CDF using the "neutrino phi weighting" template method on a lepton plus isolated track sample.” Physical Review D 79.7 (2009): 072005. c2010 American Physical Society.
Version
Final published version
Abstract
We present a measurement of the top quark mass with tt̅ dilepton events produced in pp̅ collisions at the Fermilab Tevatron (√s=1.96 TeV) and collected by the CDF II detector. A sample of 328 events with a charged electron or muon and an isolated track, corresponding to an integrated luminosity of 2.9 fb[superscript -1], are selected as tt̅ candidates. To account for the unconstrained event kinematics, we scan over the phase space of the azimuthal angles (ϕ[subscript ν1],ϕ[subscript ν2]) of neutrinos and reconstruct the top quark mass for each ϕ[subscript ν1], ϕ[subscript ν2] pair by minimizing a χ[superscript 2] function in the tt̅ dilepton hypothesis. We assign χ[superscript 2]-dependent weights to the solutions in order to build a preferred mass for each event. Preferred mass distributions (templates) are built from simulated tt̅ and background events, and parametrized in order to provide continuous probability density functions. A likelihood fit to the mass distribution in data as a weighted sum of signal and background probability density functions gives a top quark mass of 165.5[subscript -3.3][superscript +3.4](stat)±3.1(syst) GeV/c[superscript 2].
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.79.072005
