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

Xxxii shows the yields for the d0 analysis the

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Unformatted text preview: 9:30 14:38 Æ 2:09 29:57 Æ 4:33 15:45 Æ 1:91 7:59 Æ 0:81 0:31 Æ 0:03 7:27 Æ 1:12 184:7 Æ 33:04 809:6 Æ 159:4 1:70 Æ 0:14 805 1:00 Æ 0:18 7:40 Æ 3:96 0:96 Æ 0:49 2:14 Æ 0:34 0:69 Æ 0:10 0:22 Æ 0:04 0:01 Æ 0:01 0:58 Æ 0:06 0:00 Æ 0:01 0:00 Æ 0:01 1:16 Æ 0:44 14:2 Æ 4:0 0:09 Æ 0:01 11 Rev. Mod. Phys., Vol. 84, No. 4, October–December 2012 Plug region 5879 ST þ JP 3:18 Æ 0:49 6:23 Æ 3:37 1:53 Æ 0:81 1:79 Æ 0:31 0:51 Æ 0:08 0:24 Æ 0:04 0:12 Æ 0:04 0:42 Æ 0:05 0:01 Æ 0:01 0:01 Æ 0:01 1:51 Æ 0:55 15:5 Æ 3:6 0:06 Æ 0:01 13 ST þ NN 28:47 Æ 3:30 43:09 Æ 12:33 33:37 Æ 9:55 7:17 Æ 1:00 1:53 Æ 0:20 3:54 Æ 0:47 3:00 Æ 0:20 1:62 Æ 0:09 0:02 Æ 0:00 0:24 Æ 0:03 18:34 Æ 5:54 140:4 Æ 16:9 0:20 Æ 0:01 138 Hobbs, Neubauer, and Willenbrock: Tests of the standard electroweak model at . . . TABLE XXXII. The predicted and observed yields for the D0 1 fbÀ1 WH search. From Abazov et al. (2009j). W þ 2 jet 1b tag W þ 3 jet 1b tag W þ 3 jet 2b tag 2:8 Æ 0:3 34:5 Æ 3:7 268 Æ 67 347 Æ 87 95 Æ 17 49:4 Æ 9:0 104 Æ 29 896 Æ 177 885 WH WZ " Wbb W þ jets " tt Single t m jet Total Data W þ 2 jet 2b tag 1:5 Æ 0:2 5:3 Æ 0:6 54 Æ 14 14:0 Æ 4:4 37:4 Æ 7:0 12:4 Æ 2:3 8:9 Æ 2:1 132 Æ 27 136 0:7 Æ 0:1 9:1 Æ 1:0 87 Æ 22 96 Æ 24 156 Æ 29 15:7 Æ 2:9 54 Æ 15 418 Æ 76 385 0:4 Æ 0:1 1:7 Æ 0:2 22:7 Æ 5:7 8:5 Æ 2:7 81 Æ 15 6:7 Æ 1:2 8:7 Æ 2:1 129 Æ 24 122 (‘) is not identified and thus generates ET and a final state 6 consistent with the WH final state. Both CDF and D0 derive their final result by comparing the predicted and observed spectra using binned likelihoods. For both experiments, the single-tag and double-tag samples are separated and their likelihoods combined for the final results. (a) 104 D0 further separates the samples into events with exactly two jets and events with three jets. When determining the final result, CDF uses the dijet mass as the input to their likelihood. D0 uses the NN output for the two jet events and the dijet mass for three jet events. The likelihood methods are described in Sec. V.C. Systematic uncertainties are evaluated by both experiments for trigger efficiency, lepton identification efficiency, b-jet (mis)identification efficiency, the jet identification efficiency and jet energy calibration, multijet background calculation method, luminosity, and theory cross sections used for background and signal event yield calculations. CDF additionally reports uncertainties from parton density functions and initial- and final-state radiation modeling. D0 reports an additional systematic from the W þ jets simulation derived by comparing shapes of distributions of data and simulated events before b tagging. The CDF NN output distributions for the tagged event selections are shown in Fig. 50. The D0 NN output distribution (two jet events) and dijet mass distribution (three jet events) are shown in Fig. 51. The CDF and D0 cross-section limits for the WH ! ‘bb...
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