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Measurement of the top quark mass in the dilepton channel using m[subscript T2] at CDF

Author(s)
Choudalakis, Georgios; Gomez-Ceballos, Guillelmo; Hahn, Kristian Allan; Henderson, C.; Knuteson, Bruce O.; Paus, Christoph M. E.; Xie, Si; Bauer, Gerry P; Goncharov, Maxim; Makhoul, Khaldoun; ... Show more Show less
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Alternative title
Measurement of the top quark mass in the dilepton channel using mT2 at CDF
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We present measurements of the top quark mass using m[subscript T2], a variable related to the transverse mass in events with two missing particles. We use the template method applied to tt̅ dilepton events produced in pp̅ collisions at Fermilab’s Tevatron Collider and collected by the CDF detector. From a data sample corresponding to an integrated luminosity of 3.4  fb[superscript -1], we select 236 tt̅ candidate events. Using the m[subscript T2] distribution, we measure the top quark mass to be M[subscript top]=168.0[subscript -4.0][superscript +4.8](stat)±2.9(syst)  GeV/c[superscript 2]. By combining m[subscript T2] with the reconstructed top quark mass distributions based on a neutrino weighting method, we measure M[subscript top]=169.3±2.7(stat)±3.2(syst)  GeV/c[superscript 2]. This is the first application of the m[subscript T2] variable in a mass measurement at a hadron collider.
Date issued
2010-02
URI
http://hdl.handle.net/1721.1/56258
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review D
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Measurement of the top quark mass in the dilepton channel using mT2 at CDF.” Physical Review D 81.3 (2010): 031102. © 2010 The American Physical Society
Version: Final published version
ISSN
1550-7998
1550-2368

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