# Measurement of the top quark mass with dilepton events selected using neuroevolution at CDF

Abstract : We report a measurement of the top quark mass $M_t$ in the dilepton decay channel $t\bar{t}\to b\ell'^{+}\nu'_\ell\bar{b}\ell^{-}\bar{\nu}_{\ell}$. 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 $p\bar{p}$ collisions collected with the CDF II detector, yielding a measurement of $M_t= 171.2\pm 2.7(\textrm{stat.})\pm 2.9(\textrm{syst.})\mathrm{GeV}/c^2$.
Document type :
Preprints, Working Papers, ...
Complete list of metadata

http://hal.in2p3.fr/in2p3-00375592
Contributor : Swarna Bassava Connect in order to contact the contributor
Submitted on : Wednesday, April 15, 2009 - 3:17:10 PM
Last modification on : Wednesday, September 15, 2021 - 2:56:02 PM

### Identifiers

• HAL Id : in2p3-00375592, version 1
• ARXIV : 0807.4652

### Citation

T. Aaltonen, J. Adelman, T. Akimoto, M.G. Albrow, B. Alvarez Gonzalez, et al.. Measurement of the top quark mass with dilepton events selected using neuroevolution at CDF. 2009. ⟨in2p3-00375592⟩

Record views