Measurement of the top quark mass in the dilepton channel using mT2} at CDF

Aaltonen, T., Bussey, P., Robson, A. and St Denis, R. (2010) Measurement of the top quark mass in the dilepton channel using mT2} at CDF. Physical Review D, 81(3), (doi:10.1103/PhysRevD.81.031102)

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We present measurements of the top quark mass using m<sub>T2</sub>, 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<sup>-1</sup>, we select 236 tt̅ candidate events. Using the m<sub>T2</sub> distribution, we measure the top quark mass to be Mtop=168.0-4.0+4.8(stat)±2.9(syst)  GeV/c<sup>2</sup>. By combining m<sub>T2</sub> with the reconstructed top quark mass distributions based on a neutrino weighting method, we measure M<sub>top</sub>=169.3±2.7(stat)±3.2(syst)  GeV/c<sup>2</sup>. This is the first application of the m<sub>T2</sub> variable in a mass measurement at a hadron collider

Item Type:Articles
Glasgow Author(s) Enlighten ID:Robson, Professor Aidan and Bussey, Dr Peter and St Denis, Dr Richard
Authors: Aaltonen, T., Bussey, P., Robson, A., and St Denis, R.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN (Online):1089-4918

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
395963Experimental Particle PhysicsAnthony DoyleScience & Technologies Facilities Council (STFC)ST/H001077/1Physics and Astronomy