We present the final combination of CDF and D0 measurements of cross sections for single-top-quark production in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7 fb^-1 per experiment. The t-channel cross section is measured to be σ_t=2.25_-0.31^+0.29 pb. We also present the combinations of the two-dimensional measurements of the s- vs t-channel cross section. In addition, we give the combination of the s+t channel cross section measurement resulting in σ_s+t=3.30_-0.40^+0.52 pb, without assuming the standard model value for the ratio σ_s/σ_t. The resulting value of the magnitude of the top-to-bottom quark coupling is |V_tb|=1.02_-0.05^+0.06, corresponding to |V_tb|>0.92 at the 95% C.L.
Tevatron Combination of Single-Top-Quark Cross Sections and Determination of the Magnitude of the Cabibbo-Kobayashi-Maskawa Matrix Element V_tb
PAGLIARONE, Carmine Elvezio;
2015-01-01
Abstract
We present the final combination of CDF and D0 measurements of cross sections for single-top-quark production in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7 fb^-1 per experiment. The t-channel cross section is measured to be σ_t=2.25_-0.31^+0.29 pb. We also present the combinations of the two-dimensional measurements of the s- vs t-channel cross section. In addition, we give the combination of the s+t channel cross section measurement resulting in σ_s+t=3.30_-0.40^+0.52 pb, without assuming the standard model value for the ratio σ_s/σ_t. The resulting value of the magnitude of the top-to-bottom quark coupling is |V_tb|=1.02_-0.05^+0.06, corresponding to |V_tb|>0.92 at the 95% C.L.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
