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

Abstract : 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/$c^2$.
Document type :
Preprints, Working Papers, ...

http://hal.in2p3.fr/in2p3-00356263
Contributor : Swarna Bassava <>
Submitted on : Tuesday, January 27, 2009 - 10:11:41 AM
Last modification on : Monday, December 14, 2020 - 9:47:19 AM

### Identifiers

• HAL Id : in2p3-00356263, version 1
• ARXIV : 0901.3773

### Citation

T. Aaltonen, J. Adelman, T. Akimoto, B. Alvarez Gonzalez, S. Amerioy, et al.. Measurement of the top quark mass at CDF using the "neutrino $\phi$ weighting" template method on a lepton plus isolated track sample. 2009. ⟨in2p3-00356263⟩

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