Measurement of the top quark mass at CDF using the 'neutrino $\phi$ weighting' template method on a lepton plus isolated track sample - INSPIRE

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Measurement of the top quark mass at CDF using the 'neutrino $\phi$ weighting' template method on a lepton plus isolated track sample

CDF

Collaboration

Jan, 2009

17 pages

Published in:

Phys.Rev.D 79 (2009) 072005

e-Print:

0901.3773 [hep-ex]

DOI:

10.1103/PhysRevD.79.072005

PDG:

{{\mathit t}}

-Quark Mass (Direct Measurements)

Report number:

FERMILAB-PUB-09-022-E

Experiments:

FNAL-E-0830

View in:

reference search13 citations

Citations per year

Abstract: (arXiv)

We present a measurement of the top quark mass with t-tbar dilepton events produced in p-pbar collisions at the Fermilab Tevatron (

\sqrt{s}

=1.96 TeV) and collected by the CDF II detector. A sample of 328 events with a charged electron or muon and an isolated track, corresponding to an integrated luminosity of 2.9 fb

^{-1}

, are selected as t-tbar candidates. To account for the unconstrained event kinematics, we scan over the phase space for the azimuthal angles (

\phi_{\nu_1},\phi_{\nu_2}

) of neutrinos and reconstruct the top quark mass by minimizing a

\chi^2

function in the t-tbar dilepton hypothesis. We assign

\chi^2

-dependent weights to the solutions in order to build a preferred mass for each event. Preferred mass distributions (templates) are built from simulated t-tbar and background events, and parameterized in order to provide continuous probability density functions. A likelihood fit of the preferred mass distribution in data to a weighted sum of signal and background probability density functions gives a top quark mass of

165.5^{+{3.4}}_{-{3.3}}

(stat.)

\pm 3.1

(syst.) GeV/

c^2

.

Note:

Submitted to Phys. Rev. D

12.15.Ff
14.65.Ha
13.85.Qk
top: mass
mass spectrum
dilepton: final state
neutrino: angular distribution
CDF
Batavia TEVATRON Coll
kinematics

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