## Top quark mass measurement from dilepton events at CDF II with the matrix-element method

We describe a measurement of the top quark mass using events with two charmed leptons collected by the CDF II detector from p anti-p collisions with s**(1/2) = 1.96 TeV at the Fermilab Tevatron. The likelihood in top mass is calculated for each event by convoluting the leading order matrix element describing qqbar --> t anti-t --> b l nu_l b-bar l' nu_l' with detector resolution functions. The presence of background events in the data sample is modeled using similar calculations involving the matrix elements for major background processes. In a data sample with integrated luminosity of 340 pb-1, we observe 33 candidate events and measure M_top = 165.2 +/- 6.1(stat.) +/- 3.4(syst.) GeV/c2. This measurement represents the first application of this method to events with two charged leptons and is the most precise single measurement of the top quark mass in this channel.

### Duke Scholars

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## Publication Date

## Volume

## Start / End Page

## Related Subject Headings

- Nuclear & Particles Physics
- 5107 Particle and high energy physics
- 5101 Astronomical sciences
- 4902 Mathematical physics
- 0206 Quantum Physics
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0201 Astronomical and Space Sciences

### Citation

*Phys. Rev.*,

*D74*, 032009.

*Phys. Rev.*D74 (2006): 032009.

*Phys. Rev.*, vol. D74, 2006, p. 032009.

## Published In

## Publication Date

## Volume

## Start / End Page

## Related Subject Headings

- Nuclear & Particles Physics
- 5107 Particle and high energy physics
- 5101 Astronomical sciences
- 4902 Mathematical physics
- 0206 Quantum Physics
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
- 0201 Astronomical and Space Sciences