Aaltonen, T;
Adelman, J;
Akimoto, T;
Albrow, MG;
Gonzalez, BA;
Amerio, S;
Amidei, D;
... CDF Collaboration; + view all
(2009)
Measurement of the Top-Quark Mass with Dilepton Events Selected Using Neuroevolution at CDF.
Physical Review Letters
, 102
(15)
, Article 152001. 10.1103/PhysRevLett.102.152001.
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Abstract
We report a measurement of the top-quark mass M-t in the dilepton decay channel tt -> bl('+)nu(')(l)b1 nu(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 pp collisions collected with the CDF II detector, yielding a measurement of M-t=171.2 +/- 2.7(stat)+/- 2.9(syst) GeV/c(2).
Type: | Article |
---|---|
Title: | Measurement of the Top-Quark Mass with Dilepton Events Selected Using Neuroevolution at CDF |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevLett.102.152001 |
Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.102.152001 |
Language: | English |
Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | NEURAL-NETWORKS, FERMILAB, COLLISIONS, TEVATRON, TEV |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
URI: | https://discovery-pp.ucl.ac.uk/id/eprint/131645 |
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