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Título

Measurement of the top-quark mass using missing E-T plus jets events with secondary vertex b-tagging at CDF II

Autor Aaltonen, T.; Ruiz Jimeno, Alberto ; Gómez, G. ; Cuenca Almenar, Cristóbal ; Palencia, Enrique ; Menzemer, Stephanie; Cabrera, Susana ; Cuevas, Javier ; Piedra, Jonatan ; Chuang, S. H. ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; Casal, Bruno ; Rodrigo, Teresa
Palabras clave [PACS] Quark and lepton masses and mixing in electroweak interactions
[PACS] Hadron-induced inclusive production with identified hadrons (energy > 10 GeV)
[PACS] Top quarks
Fecha de publicación 29-jun-2007
EditorAmerican Physical Society
Citación Physical Review D 75: 111103(R) (2007)
ResumenWe present a measurement of the top-quark mass in p(p)over bar collisions at sqrt{s} = 1.96 TeV which uses events with an inclusive signature of missing transverse energy and jets. The event selection is sensitive to t(t)over bar -> W(+)bW(-)(b)over bar -> l nu bqq'(b)over bar independent of the lepton flavor and results in a large acceptance for W -> tau nu decays. All-hadronic t(t)over bar decays and events with identified electrons or muons are vetoed to provide a statistically independent sample with respect to all previous measurements. The top-quark mass is inferred from the distribution of the scalar sum of all jet transverse energies and the missing transverse energy. Using 311 pb(-1) of integrated luminosity recorded by the Collider Detector at Fermilab, we measure a top-quark mass m(t) = 172.3(-9.6)(+10.8)(stat) ± 10.8(syst) GeV/c^2. While the uncertainty on m(t) is larger than that of other measurements, the result is statistically uncorrelated with those of other methods and thus can help to reduce the overall m(t) uncertainty when combined with other existing measurements.
Descripción 8 pages, 4 figures.-- PACS nrs.: 12.15.Ff, 13.85.Ni, 14.65.Ha.-- CDF Collaboration: et al.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevD.75.111103
URI http://hdl.handle.net/10261/8535
DOI10.1103/PhysRevD.75.111103
ISSN1550-7998
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