Measurement of the Top-Quark Mass with Dilepton Events Selected Using Neuroevolution at CDF
Name
PhysRevLett.102.152001.pdf
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Author(s)
CDF Collaboration
Bauer, Gerry P
Choudalakis, Georgios
Gomez-Ceballos, Guillelmo
Hahn, Kristian Allan
Makhoul, Khaldoun
Paus, Christoph M. E.
Xie, Si
Henderson, C.
Knuteson, Bruce O.
Date Issued
April 2009
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Aaltonen, T. et al. “Measurement of the Top-Quark Mass with Dilepton Events Selected Using Neuroevolution at CDF.” Physical Review Letters 102, 15 (April 2009): 152001 © 2009 The American Physical Society
Version
Final published version
Abstract
We report a measurement of the top-quark mass Mt in the dilepton decay channel tt̄→bl′+νl′b̄l-ν̄l. Events are selected with a neural network which has been directly optimized for statistical precision in top-quark mass using neuroevolution, a technique modeled on biological evolution. The top-quark mass is extracted from per-event probability densities that are formed by the convolution of leading order matrix elements and detector resolution functions. The joint probability is the product of the probability densities from 344 candidate events in 2.0fb-1 of pp̄ collisions collected with the CDF II detector, yielding a measurement of Mt=171.2±2.7(stat)±2.9(syst)GeV/c2.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.102.152001
