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Title
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Measurement of the top-quark mass with dilepton events selected using neuroevolution at CDF
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| We report a measurement of the top-quark mass Mt in the dilepton decay channel tt̅ →bl′+νl′b̅ l-ν̅ l. 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 2.0 fb-1 of pp̅ collisions collected with the CDF II detector, yielding a measurement of Mt=171.2±2.7(stat)±2.9(syst) GeV/c2. |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
:
American Physical Society
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2009
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ISSN
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0031-9007
[print]
1079-7114
[online]
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Volume/pages
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102
:15
(2009)
, p. 152001,1-152001,8
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ISI
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000265285700016
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Full text (Publisher's DOI)
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Full text (open access)
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