We report a measurement of the single-top-quark production cross section in 2.2 fb(-1) of p (p) over bar collision data collected by the Collider Detector at Fermilab at root s = 1.96 TeV. Candidate events are classified as signal-like by three parallel analyses which use likelihood, matrix element, and neural network discriminants. These results are combined in order to improve the sensitivity. We observe a signal consistent with the standard model prediction, but inconsistent with the background-only model by 3.7 standard deviations with a median expected sensitivity of 4.9 standard deviations. We measure a cross section of 2.2(-0.6)(+0.7)(stat + syst) pb, extract the Cabibbo-Kobayashi-Maskawa matrix-element value vertical bar V(tb)vertical bar 0.88(-0.12)(+0.13)(stat + syst) +/- 0.07(theory), and set the limit vertical bar V(tb)vertical bar > 0.66 at the 95% C.L.

CDF Collaboration, T. Aaltonen, J. Adelman, T. Akimoto, M. G. Albrow, B. Álvarez González, et al. (2008). Measurement of the Single Top Quark Production Cross Section at CDF. PHYSICAL REVIEW LETTERS, 101(25), 1-8 [10.1103/PhysRevLett.101.252001].

Measurement of the Single Top Quark Production Cross Section at CDF

CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2008

Abstract

We report a measurement of the single-top-quark production cross section in 2.2 fb(-1) of p (p) over bar collision data collected by the Collider Detector at Fermilab at root s = 1.96 TeV. Candidate events are classified as signal-like by three parallel analyses which use likelihood, matrix element, and neural network discriminants. These results are combined in order to improve the sensitivity. We observe a signal consistent with the standard model prediction, but inconsistent with the background-only model by 3.7 standard deviations with a median expected sensitivity of 4.9 standard deviations. We measure a cross section of 2.2(-0.6)(+0.7)(stat + syst) pb, extract the Cabibbo-Kobayashi-Maskawa matrix-element value vertical bar V(tb)vertical bar 0.88(-0.12)(+0.13)(stat + syst) +/- 0.07(theory), and set the limit vertical bar V(tb)vertical bar > 0.66 at the 95% C.L.
2008
CDF Collaboration, T. Aaltonen, J. Adelman, T. Akimoto, M. G. Albrow, B. Álvarez González, et al. (2008). Measurement of the Single Top Quark Production Cross Section at CDF. PHYSICAL REVIEW LETTERS, 101(25), 1-8 [10.1103/PhysRevLett.101.252001].
CDF Collaboration; T. Aaltonen; J. Adelman; T. Akimoto; M. G. Albrow; B. Álvarez González; S. Amerio; D. Amidei; A. Anastassov; A. Annovi; J. Antos; G...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/71761
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