Abstract
Measurements of top quark pair production are presented based on data recorded with the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) in 2011 and 2012. Inclusive and differential top quark pair production cross section measurements in various channels are described. Inclusive as well as differential measurements of the charge asymmetry in top quark pair events are summarised and a method for the extraction of the strong coupling alpha(s) from the measured top pair production cross section is discussed. All measurements are in agreement with the Standard Model predictions.
Highlights
The top quark is the heaviest fundamental particle described by the Standard Model of particle physics
Measurements of top quark pair production are presented based on data recorded with the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC) in 2011 and 2012
The charge asymmetry is measured in the semileptonic [15] as well as in the di-leptonic channels [17] w√ith electrons and muons at a centre-of-mass energy of s = 7 TeV
Summary
The top quark is the heaviest fundamental particle described by the Standard Model of particle physics. Due to the high mass its lifetime is shorter than the hadronisation time. This makes it possible to study the properties of top quarks based on their decay products. Top quark production is an important process to perform precision tests of the Standard Model. In many predicted processes of physics beyond the Standard Model top quark events are one of the dominant background contributions. The CMS detector [1] is one of the two large multi-purpose detectors at the LHC and allows for a study of a wide range of physics processes.
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