Measurement of the Top Quark Mass in the Dilepton Channel Using $m_{T2}$ at CDF

Aaltonen, T.

doi:10.1103/PhysRevD.81.031102

Measurement of the Top Quark Mass in the Dilepton Channel Using $$m_{T2}$$ at CDF

Journal Article · Sun Nov 01 04:00:00 EST 2009 · Phys.Rev.D

DOI:https://doi.org/10.1103/PhysRevD.81.031102· OSTI ID:1847787

Aaltonen, T.

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.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: CDF

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1847787

Report Number(s):: FERMILAB-PUB-09-580-E; arXiv:0911.2956; oai:inspirehep.net:837010

Journal Information:: Phys.Rev.D, Journal Name: Phys.Rev.D Vol. 81

Country of Publication:: United States

Language:: English

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