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Inclusive and differential measurements of the t¯t charge asymmetry in pp collisions at √ s = 8 TeV
CMS Collaboration
CMS Collaboration
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Abstract
Thett¯ charge asymmetry is measured in proton–proton collisions at a centre-of-mass energy of 8 TeV8 TeV. The data, collected with the CMS experiment at the LHC, correspond to an integrated luminosity of 19.7 fb−1. Selected events contain an electron or a muon and four or more jets, where at least one jet is identified as originating from b-quark hadronization. The inclusive charge asymmetry is found to be 0.0010±0.0068 (stat)±0.0037 (syst)0.0010±0.0068 (stat)±0.0037 (syst). In addition, differential charge asymmetries as a function of rapidity, transverse momentum, and invariant mass of the View the MathML sourcett¯ system are studied. For the first time at the LHC, the measurements are also performed in a reduced fiducial phase space of top quark pair production, with an integrated result of −0.0035±0.0072 (stat)±0.0031 (syst)−0.0035±0.0072 (stat)±0.0031 (syst). All measurements are consistent within two standard deviations with zero asymmetry as well as with the predictions of the standard model.
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Date
2016-06-10
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Elsevier
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CMSCollaboration_2016.pdf
Adobe PDF, 1.09 MB
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Keywords
CMS, Physics, Top quark, Charge asymmetry
Citation
Vaitkus, J. V. (2016). Inclusive and differential measurements of the tt¯ charge asymmetry in pp collisions at√ s= 8 TeV. Physics letters B, 154-179.