Measurement of the Top Quark Pair Production Cross Section and Simultaneous Extraction of the W Heavy Flavor Fraction at √s = 7 TeV with the ATLAS Detector at the LHC

Roe, Adam

dc.contributor.advisor	Quadt, Arnulf Prof. Dr.	de
dc.contributor.author	Roe, Adam	de
dc.date.accessioned	2012-04-27T15:58:09Z	de
dc.date.accessioned	2013-01-18T13:43:58Z	de
dc.date.available	2013-01-30T23:51:15Z	de
dc.date.issued	2012-04-27	de
dc.identifier.uri	http://hdl.handle.net/11858/00-1735-0000-000D-F082-7	de
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-2968
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-2968
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-2968
dc.format.mimetype	application/pdf	de
dc.language.iso	eng	de
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/	de
dc.title	Measurement of the Top Quark Pair Production Cross Section and Simultaneous Extraction of the W Heavy Flavor Fraction at √s = 7 TeV with the ATLAS Detector at the LHC	de
dc.type	doctoralThesis	de
dc.title.translated	Messung des Top-Quark-Paar Wirkungsquerschnitts und gleichzeitige Bestimmung des W Heavy Flavor Anteils bei √s = 7 TeV mit dem ATLAS Detektor am LHC	de
dc.contributor.referee	Quadt, Arnulf Prof. Dr.	de
dc.date.examination	2012-03-22	de
dc.subject.dnb	530 Physik	de
dc.subject.gok	RDE 000	de
dc.description.abstracteng	The top quark pair production cross section, σtt, is measured in the semileptonic channel in two datasets using a binned profiled likelihood template fit to data to discriminate the signal, tt, from its main background, the production of a W-boson in association with jets (W+jets). Templates in the first analysis are derived from a four variable flavor-sensitive discriminant to measure σtt in ∫ L dt = 35 pb-1. A similar but flavor-insensitive discriminant is then used to measure σtt in ∫ L dt = 0.7 fb-1. A third analysis is presented which simultaneously fits the fractions of tt and W+jets events in which heavy flavor jets are produced, using a single flavor-sensitive distribution in the ∫ L dt = 0.7 fb-1 dataset. Experimental precision of the top quark pair production cross section surpasses the theoretical uncertainty. No significant deviations from predictions are found but the results are higher than expectation.	de
dc.contributor.coReferee	Große-Knetter, Jörn PD Dr.	de
dc.contributor.thirdReferee	Schumann, Steffen Prof. Dr.	de
dc.subject.topic	Physics	de
dc.subject.ger	Teilchenphysik	de
dc.subject.ger	Top Quark	de
dc.subject.ger	ATLAS	de
dc.subject.ger	LHC	de
dc.subject.ger	Wirkungsquerschnitt	de
dc.subject.ger	quershnitt	de
dc.subject.eng	Particle Physics	de
dc.subject.eng	Top Quark	de
dc.subject.eng	ATLAS	de
dc.subject.eng	LHC	de
dc.subject.eng	cross section	de
dc.subject.eng	production cross section	de
dc.subject.bk	33.56	de
dc.identifier.urn	urn:nbn:de:gbv:7-webdoc-3484-8	de
dc.identifier.purl	webdoc-3484	de
dc.affiliation.institute	Fakultät für Physik	de
dc.identifier.ppn	727053043	de

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