Top quark mass measurement in the tt all hadronic channel using a matrix element technique in pp collisions at {radical}(s)=1.96 TeV
- Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
We present a measurement of the top quark mass in the all hadronic channel (tt{yields}bbq{sub 1}q{sub 2}q{sub 3}q{sub 4}) using 943 pb{sup -1} of pp collisions at {radical}(s)=1.96 TeV collected at the CDF II detector at Fermilab (CDF). We apply the standard model production and decay matrix element (ME) to tt candidate events. We calculate per-event probability densities according to the ME calculation and construct template models of signal and background. The scale of the jet energy is calibrated using additional templates formed with the invariant mass of pairs of jets. These templates form an overall likelihood function that depends on the top quark mass and on the jet energy scale (JES). We estimate both by maximizing this function. Given 72 observed events, we measure a top quark mass of 171.1{+-}3.7(stat+JES){+-}2.1(syst) GeV/c{sup 2}. The combined uncertainty on the top quark mass is 4.3 GeV/c{sup 2}.
- OSTI ID:
- 21308140
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 79, Issue 7; Other Information: DOI: 10.1103/PhysRevD.79.072010; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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