Measurement of the top quark mass using template methods on dilepton events in <script type="math/tex">p\overline{p}</script> collisions at <script type="math/tex">\sqrt{s}</script>=1.96 TeV

Abulencia, A.; Van Remortel, N.; et al.

doi:10.1103/PHYSREVD.73.112006

Title

Measurement of the top quark mass using template methods on dilepton events in $p\overline{p}$ collisions at $\sqrt{s}$ =1.96 TeV

Author

Abulencia, A.

Van Remortel, N.

et al.

Abstract

We describe a measurement of the top quark mass from events produced in pp̅ collisions at a center-of-mass energy of 1.96 TeV, using the Collider Detector at Fermilab. We identify tt̅ candidates where both W bosons from the top quarks decay into leptons (eν, μν, or τν) from a data sample of 360 pb-1. The top quark mass is reconstructed in each event separately by three different methods, which draw upon simulated distributions of the neutrino pseudorapidity, tt̅ longitudinal momentum, or neutrino azimuthal angle in order to extract probability distributions for the top quark mass. For each method, representative mass distributions, or templates, are constructed from simulated samples of signal and background events, and parametrized to form continuous probability density functions. A likelihood fit incorporating these parametrized templates is then performed on the data sample masses in order to derive a final top quark mass. Combining the three template methods, taking into account correlations in their statistical and systematic uncertainties, results in a top quark mass measurement of 170.1±6.0(stat.)±4.1(syst.) GeV/c2.

Language

English

Source (journal)

Physical review : D : particles, fields, gravitation, and cosmology / American Physical Society. - Ridge, N.Y., 2004 - 2015

Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003

Publication

Ridge, N.Y. : American Physical Society , 2006

ISSN

1550-7998 [print]

1550-2368 [online]

DOI

10.1103/PHYSREVD.73.112006