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

 dc.contributor.author Aaltonen, Timo dc.contributor.author Mehtälä, Petteri dc.contributor.author Orava, Risto dc.contributor.author Saarikko, Heimo dc.contributor.author Österberg, Kenneth dc.contributor.author CDF Collaboration dc.date.accessioned 2010-12-16T11:51:00Z dc.date.available 2010-12-16T11:51:00Z dc.date.issued 2010 dc.identifier.citation Aaltonen , T , Mehtälä , P , Orava , R , Saarikko , H , Österberg , K & CDF Collaboration 2010 , ' Measurement of the top quark mass in the dilepton channel using mT2 at CDF ' , Physical Review D : Particles, Fields, Gravitation and Cosmology , vol. 81 , no. 3 , pp. 031102 . https://doi.org/10.1103/PhysRevD.81.031102 dc.identifier.other PURE: 7609963 dc.identifier.other PURE UUID: 9e5ea496-eaad-406d-ae58-1e1876e79e6f dc.identifier.other ArXiv: http://arxiv.org/abs/0911.2956v3 dc.identifier.other WOS: 000275069000002 dc.identifier.other Scopus: 77749320139 dc.identifier.other ORCID: /0000-0003-4807-0414/work/29936369 dc.identifier.uri http://hdl.handle.net/10138/24084 dc.description Submitted to Phys. Rev. D dc.description.abstract We present measurements of the top quark mass using the \mT2, a variable related to the transverse mass in events with two missing particles. We use the template method applied to t\tbar dilepton events produced in p\pbar collisions at Fermilab's Tevatron and collected by the CDF detector. From a data sample corresponding to an integrated luminosity of 3.4 \invfb, we select 236 t\tbar candidate events. Using the \mT2 distribution, we measure the top quark mass to be M_{Top} = 168.0^{+4.8}_{-4.0} $\pm$ {2.9} GeV/c^{2}. By combining the \mT2 with the reconstructed top mass distributions based on a neutrino weighting method, we measure M_{top}=169.3 $\pm$ 2.7 $\pm$ 3.2 GeV/c^{2}. This is the first application of the \mT2 variable in a mass measurement at a hadron collider. fi dc.description.abstract We present measurements of the top quark mass using mT2, 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-1, we select 236 tt̅ candidate events. Using the mT2 distribution, we measure the top quark mass to be Mtop=168.0-4.0+4.8(stat)±2.9(syst)  GeV/c2. By combining mT2 with the reconstructed top quark mass distributions based on a neutrino weighting method, we measure Mtop=169.3±2.7(stat)±3.2(syst)  GeV/c2. This is the first application of the mT2 variable in a mass measurement at a hadron collider. en dc.format.extent 9 dc.language.iso eng dc.relation.ispartof Physical Review D : Particles, Fields, Gravitation and Cosmology dc.rights.uri info:eu-repo/semantics/restrictedAccess dc.subject hep-ex dc.subject 114 Physical sciences dc.title Measurement of the top quark mass in the dilepton channel using mT2 at CDF en dc.title.alternative Top Quark Mass Measurement using mT2 in the Dilepton Channel at CDF fi dc.type Article dc.contributor.organization Department of Physics dc.contributor.organization Helsinki Institute of Physics dc.description.reviewstatus Peer reviewed dc.relation.doi https://doi.org/10.1103/PhysRevD.81.031102 dc.relation.issn 1550-7998 dc.rights.accesslevel restrictedAccess dc.identifier.url http://prd.aps.org/pdf/PRD/v81/i3/e031102