## Single-top production t-channel cross section measurement in the electron+jets final state at ATLAS with 35 pb-1 of data

 dc.contributor.advisor Cristinziani, Markus dc.contributor.author Khoriauli, Gia dc.date.accessioned 2020-04-18T01:17:56Z dc.date.available 2020-04-18T01:17:56Z dc.date.issued 03.09.2012 dc.identifier.uri http://hdl.handle.net/20.500.11811/5375 dc.description.abstract The cross section of the Standard Model electroweak production of a single top quark in the t-channel has been measured using the LHC proton-proton collision data at $sqrt{s}=7$ TeV, $35 {\rm pb}^{-1}$ of integrated luminosity, recorded by the ATLAS detector during the year 2010. The measurement has been based on a selection of the collision events with an electron and one b-tagged hadronic jet in the central region of the detector and one extra jet in the forward region of the detector. These requirements are dictated by the topology of the final state particles in the t-channel process. They helped to optimize an expected fraction of the t-channel process, according to a study based on Monte-Carlo simulation, in the selected events and suppress the contribution of the background processes. The main background processes such as production of hadronic jets via the strong interaction and production of a single W boson with associated hadronic jets are measured by means of data driven methods developed in this work. The measured cross section of single top quark production in the t-channel process is $59 ^{ +44}_{ -39} ({\rm stat.}) ^{+63}_{-39} ({\rm syst.})$ pb. The measured upper limit on the cross section is $226$ pb at the 95% confidence level. The results are in agreement with the latest theoretical prediction of the t-channel cross section of the Standard Model production of a single top quark calculated at NNLO, $64.6 ^{ +3.3}_{ -2.6}$ pb, considering $m _{t-{\rm quark}}=172.5$ GeV. dc.language.iso eng dc.rights In Copyright dc.rights.uri http://rightsstatements.org/vocab/InC/1.0/ dc.subject Standard Model dc.subject Electroweak interaction dc.subject Single top quark dc.subject t-channel dc.subject Cross section dc.subject LHC dc.subject ATLAS dc.subject Physics analysis dc.subject Data driven methods dc.subject QCD multi-jets dc.subject Likelihood dc.subject.ddc 530 Physik dc.title Single-top production t-channel cross section measurement in the electron+jets final state at ATLAS with 35 pb-1 of data dc.type Dissertation oder Habilitation dc.publisher.name Universitäts- und Landesbibliothek Bonn dc.publisher.location Bonn dc.rights.accessRights openAccess dc.identifier.urn https://nbn-resolving.org/urn:nbn:de:hbz:5n-29648 ulbbn.pubtype Erstveröffentlichung ulbbnediss.affiliation.name Rheinische Friedrich-Wilhelms-Universität Bonn ulbbnediss.affiliation.location Bonn ulbbnediss.thesis.level Dissertation ulbbnediss.dissID 2964 ulbbnediss.date.accepted 26.06.2012 ulbbnediss.fakultaet Mathematisch-Naturwissenschaftliche Fakultät dc.contributor.coReferee Wermes, Norbert
﻿

### This item appears in the following Collection(s)

The following license files are associated with this item:

Indexed by
Theme by