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

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#### Pysyväisosoite

http://hdl.handle.net/10138/24084

#### Lähdeviite

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

 Julkaisun nimi: Measurement of the top quark mass in the dilepton channel using mT2 at CDF Toissijainen nimi: Top Quark Mass Measurement using mT2 in the Dilepton Channel at CDF Tekijä: Aaltonen, Timo; Mehtälä, Petteri; Orava, Risto; Saarikko, Heimo; Österberg, Kenneth; CDF Collaboration Tekijän organisaatio: Department of PhysicsHelsinki Institute of Physics Päiväys: 2010 Kieli: eng Sivumäärä: 9 Kuuluu julkaisusarjaan: Physical Review D : Particles, Fields, Gravitation and Cosmology ISSN: 1550-7998 DOI-tunniste: https://doi.org/10.1103/PhysRevD.81.031102 URI: http://hdl.handle.net/10138/24084 Tiivistelmä: 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.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. Kuvaus: Submitted to Phys. Rev. D Avainsanat: hep-ex 114 Physical sciences Vertaisarvioitu: Kyllä Pääsyrajoitteet: restrictedAccess
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