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Measurement of spin correlations in ttproduction using the matrix element method in the muon+jets final state in pp collisions at √s=8TeV
CMS Collaboration
CMS Collaboration
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Abstract
The consistency of the spin correlation strength in top quark pair production with the standard model (SM) prediction is tested in the muon+jets final state. The events are selected from pp collisions, collected by the CMS detector, at a centre-of-mass energy of 8TeV, corresponding to an integrated luminosity of 19.7fb−1. The data are compared with the expectation for the spin correlation predicted by the SM and with the expectation of no correlation. Using a template fit method, the fraction of events that show SM spin correlations is measured to be 0.72 ±0.08 (stat)+0.15−0.13(syst), representing the most precise measurement of this quantity in the muon+jets final state to date.
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Date
2016-05-06
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Elsevier
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Keywords
CMS, LHC, Top quark, Matrix element method, Spin
Citation
CMS collaboration. (2016). Measurement of spin correlations in production using the matrix element method in the muon+ jets final state in pp collisions at. Physics letters B, 758, 321-346.