Measurement Of The Top Quark Pair Production Cross Section With The Atlas Experiment At S
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| Author | : Anna Christine Henrichs |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 231 |
| Release | : 2013-10-04 |
| Genre | : Science |
| ISBN | : 3319014870 |
Download Top Quark Pair Production Book in PDF, Epub and Kindle
Before any kind of new physics discovery could be made at the LHC, a precise understanding and measurement of the Standard Model of particle physics' processes was necessary. The book provides an introduction to top quark production in the context of the Standard Model and presents two such precise measurements of the production of top quark pairs in proton-proton collisions at a center-of-mass energy of 7 TeV that were observed with the ATLAS Experiment at the LHC. The presented measurements focus on events with one charged lepton, missing transverse energy and jets. Using novel and advanced analysis techniques as well as a good understanding of the detector, they constitute the most precise measurements of the quantity at that time.
| Author | : Volker Vorwerk |
| Publisher | : |
| Total Pages | : 206 |
| Release | : 2011 |
| Genre | : |
| ISBN | : |
Download Measurement of the Top Quark Pair Production Cross Section with the ATLAS Experiment at √s Book in PDF, Epub and Kindle
| Author | : Jordi Nadal Serrano |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2012* |
| Genre | : |
| ISBN | : |
Download Simultaneous Measurement of the Top Quark Pair Production Cross-section and Rb in the ATLAS Experiment Book in PDF, Epub and Kindle
| Author | : Tatevik Abajyan |
| Publisher | : |
| Total Pages | : 139 |
| Release | : 2012 |
| Genre | : |
| ISBN | : |
Download Measurement of the Top Quark Pair Production Cross Section with the ATLAS Detector at LHC in Pp Collisions at √s Book in PDF, Epub and Kindle
| Author | : Babak Abi |
| Publisher | : |
| Total Pages | : 154 |
| Release | : 2012 |
| Genre | : |
| ISBN | : |
Download Measurement of the Top Quark Pair Production Cross Section with ATLAS Detector Book in PDF, Epub and Kindle
| Author | : Bin Guo |
| Publisher | : |
| Total Pages | : |
| Release | : 2012 |
| Genre | : |
| ISBN | : |
Download Measurement of the Top Quark Pair Production Cross Section and an In-situ B-tagging Efficiency Calibration with ATLAS in Pp Collisions at √s Book in PDF, Epub and Kindle
We present a measurement of the top anti-top quark (ttbar)production cross section in the dilepton final states from proton-proton collisions at a center of mass energy at 7 TeV at the LHC. A b-tagging algorithm based on tracks displaced from the event interaction vertex is applied to identify bottom quark jets from top quark decay and reject background events. Given the relatively pure sample of bottom quark jets in ttbar dilepton final states, a new technique to measure in-situ the b-tagging efficiency is introduced that uses the distribution of the number of observed b-tagged jets. We present results with data collected at the ATLAS detector in 2010 with an integrated luminosity of 35 pb-1. The measured ttbar cross section is 176 +22/-21 (stat.) ± 20 (syst.) ± 6 (lum.) pb in the dilepton channel. We will also discuss the future prospects of this measurement.
| Author | : |
| Publisher | : |
| Total Pages | : 32 |
| Release | : 2015 |
| Genre | : |
| ISBN | : |
Download Measurement of the Top Quark Pair Production Cross Section in Proton-proton Collisions at $\sqrt{s} Book in PDF, Epub and Kindle
The top quark pair production cross section is measured for the first time in proton-proton collisions at √s= 13 TeV by theCMS experiment at the CERN LHC, using data corresponding to an integrated luminosity of 42 pb-1. The measurement is performed by analyzing events with at least one electron and one muon of opposite charge, and at least two jets. We then measured the cross section and found that was 769 ± 60 (stat) ± 55 (syst) ± 92 (lumi) pb, in agreement with the expectation from the standard model.
| Author | : |
| Publisher | : |
| Total Pages | : 30 |
| Release | : 2013 |
| Genre | : |
| ISBN | : |
Download Measurement of the Top Quark-Pair Production Cross Section With ATLAS in Pp Collisions at $\sqrt{s} Book in PDF, Epub and Kindle
| Author | : Anna Christine Henrichs |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2012 |
| Genre | : |
| ISBN | : |
Download Precision Measurements of the Top Quark Pair Production Cross Section in the Single Lepton Channel with the ATLAS Experiment Book in PDF, Epub and Kindle
| Author | : |
| Publisher | : |
| Total Pages | : 48 |
| Release | : 2016 |
| Genre | : |
| ISBN | : |
Download Measurement of the Production Cross-section of a Single Top Quark in Association with a W Boson at 8 TeV with the ATLAS Experiment Book in PDF, Epub and Kindle
The cross-section for the production of a single top quark in association with a W boson in proton-proton collisions at √s = 8 is measured. The dataset corresponds to an integrated luminosity of 20.3 fb-1, collected by the ATLAS detector in 2012 at the Large Hadron Collider at CERN. Events containing two leptons and one central b-jet are selected. The Wt signal is separated from the backgrounds using boosted decision trees, each of which combines a number of discriminating variables into one classifier. Production of Wt events is observed with a significance of 7.7[sigma]. The cross-section is extracted in a profile likelihood fit to the classifier output distributions. The Wt cross-section, inclusive of decay modes, is measured to be 23.0±1.3(stat.)-3.5+3.2(syst.)±1.1(lumi.) pb. The measured cross-section is used to extract a value for the CKM matrix element.
