## Precision measurement of the top quark mass from dilepton events at CDF II

We report a measurement of the top-quark mass, Mt, in the dilepton decay channel of t[overline t]-->b[script-l][prime]+nu[script-l][prime][overline b][script-l]-[overline nu ][script-l] using an integrated luminosity of 1.0 fb-1 of p[overline p] collisions collected with the CDF II detector. We apply a method that convolutes a leading-order matrix element with detector resolution functions to form event-by-event likelihoods; we have enhanced the leading-order description to describe the effects of initial-state radiation. The joint likelihood is the product of the likelihoods from 78 candidate events in this sample, which yields a measurement of Mt=164.5$\pm$3.9(stat.)$\pm$3.9(syst.) GeV/c2, the most precise measurement of Mt in the dilepton 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.*,

*D75*, 031105.

*Phys. Rev.*D75 (2007): 031105.

*Phys. Rev.*, vol. D75, 2007, p. 031105.

## 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