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We present a new method for the experimental determination of the top quarkmass that is based upon the mean distance of travel of b hadrons in top quarkevents. The dominant systematic uncertainties of this method are not correlatedwith those of other methods, but alarge number of events is required to achievesmall statistical uncertainty. Large ttbar event samples are expected from RunII of the Fermilab Tevatron and the CERN Large Hadron Collider (LHC). We showthat by the end of Run II, a single experiment at the Tevatron could achieve atop quark mass uncertainty of ~5 GeV/c^2 by this method alone. At the CERN LHC,this method could be comparable to all others methods, which are expected toachieve an uncertainty of ~1.5 GeV/c^2 per experiment. This new method wouldprovide a useful cross-check to other methods, and could be combined with themto obtain a substantially reduced overall uncertainty.Comment: Submitted to Phys. Rev. D, 35 pages, 13 figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Method for measurement of the top quark mass using the mean decay length of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>b</mml:mi></mml:math>hadrons in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>t</mml:mi><mml:mover accent="true"><mml:mi mathvariant="italic">t</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>events

Method for measurement of the top quark mass using the mean decay length ofbhadrons intt¯events