RevModPhys.84.1477】Tests of the standard electroweak model at the energy frontier

24theo jet calibration 3 matrix 1645 39stat

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Unformatted text preview: , 2009c. j Abazov et al., 2007c. m Aaltonen et al., 2009f. p Amsler et al., 2008. Aaltonen et al., 2009e. Abulencia et al., 2007c. h Abazov et al., 2008f. k Abulencia et al., 2006a. n Aaltonen et al., 2007c. Rev. Mod. Phys., Vol. 84, No. 4, October–December 2012 2.2 2.5 1:8? 3.5 1.2 0.6, 0.5 0.83 6.8 1.7 1.1 4.5 0.6, 0.5 9.6 CDFa CDFb CDFc CDFd CDFe D0f CDFg D0h CDFi D0j CDFk CDFl CDFm CDFn CDF þ D0o Aaltonen et al., 2009b. Abazov et al., 2009i. i Abulencia et al., 2007d. l Aaltonen et al., 2007b. o Tevatron Electroweak Working Group, 2009c. Hobbs, Neubauer, and Willenbrock: Tests of the standard electroweak model at . . . 1508 Systematic uncertainties in top mass measurements arise from both experimental sources and theory. Although the contribution from calibration uncertainties has been significantly reduced as described in the previous paragraph, the dominant contributions to the systematic uncertainty from experimental sources are the absolute reconstructed jet energy calibration and the relative calibrations of jets initiated by b quarks and those from light quarks (u, d, s). Of these, the uncertainty from the jet calibrations dominates the experimental uncertainties. Uncertainties arising from theory include the production model as assessed by comparing event generators and fragmentation. The production model uncertainty becomes the dominant theory uncertainty when various measurements are combined. Table XXIII and Fig. 44 give a summary of the published top mass results and a comparison with the 2008 Particle Data Group (PDG) (Amsler et al., 2008) average. When multiple results from one experiment using the same method and final state were available, only the highest integrated luminosity measurement was reported. The result shown in Table XXIII R with highest integrated luminosity used a Ldt ¼ 2:9 fbÀ1 data sample. The Tevatron experiments have now reported preliminary results using up to 4 fbÀ1 , and these results have been included in a world average combination by the Tevatron Electroweak Working Group, with the most recent such combination (Tevatron Electroweak Working Group, 2009c) giving Mt ¼ 173:1 Æ 0:6ðstatÞ Æ 1:1ðsystÞ GeV=c2 : ll+lj, CDF [a] ll, CDF [b] ll, CDF [c] ll, CDF [d] ll, D0 [e] l+jets, CDF [f] l+jets, D0 [g] l+jets, D0 [h] l+jets, CDF [i] all jets, CDF [j] PDG ’08 Tevatron Average 170 180 190 200 mt (GeV) FIG. 44 (color online). Published top mass measurements. For a given experiment and final state, the results from different methods have a significant correlation. [a]Aaltonen et al. (2009d); [b] Aaltonen et al. (2009b); [c] Aaltonen et al. (2008c); [d] Abulencia et al. (2007c); [e] Abazov et al. (2009i); [f] Aaltonen et al. (2009c); [g] Abazov et al. (2008f); [h] Abazov et al. (2007c); [i] Abulencia et al. (2006a); [j] Aaltonen et al. (2007b); [k] Aaltonen et al. (2009f). Also shown are the most recent Tevatron combination (Tevatron Electroweak Working Group, 2009c) and the PDG world average (Amsler e...
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This document was uploaded on 09/28/2013.

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