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Título

Measurement of the top quark mass using the invariant mass of lepton pairs in soft muon b-tagged events

AutorCDF Collaboration; Cabrera, Susana ; Cuenca Almenar, Cristóbal ; Álvarez González, B.; Casal, Bruno ; Cuevas, Javier ; Gómez, G. ; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; Aaltonen, T.
Fecha de publicación8-sep-2009
EditorAmerican Physical Society
CitaciónPhysical Review - Section D - Particles and Fields 80 (5): 051104 (2009)
ResumenWe present the first measurement of the mass of the top quark in a sample of t (t) over bar -> l (nu) over barb (b) over barq (q) over bar events (where l = e, mu) selected by identifying jets containing a muon candidate from the semileptonic decay of heavy-flavor hadrons (soft muon b tagging). The p (p) over bar collision data used correspond to an integrated luminosity of 2 fb(-1) and were collected by the CDF II detector at the Fermilab Tevatron Collider. The measurement is based on a novel technique exploiting the invariant mass of a subset of the decay particles, specifically the lepton from the W boson of the t -> Wb decay and the muon from a semileptonic b decay. We fit template histograms, derived from simulation of t (t) over bar events and a modeling of the background, to the mass distribution observed in the data and measure a top quark mass of 180.5 +/- 12.0(stat) +/- 3.6(syst) GeV/c(2), consistent with the current world average value.
Versión del editorhttp://dx.doi.org/ 10.1103/PhysRevD.80.051104
URIhttp://hdl.handle.net/10261/22213
DOI10.1103/PhysRevD.80.051104
ISSN1550-7998
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