MEASUREMENT OF THE TOP QUARK MASS IN THE ALL HADRONIC FINAL STATE AT THE DØ EXPERIMENT

Simple item page
dc.contributor.advisorGutierrez, Phillip
dc.creatorJAYASINGHE, AYESH
dc.date.accessioned2019-04-27T21:26:37Z
dc.date.available2019-04-27T21:26:37Z
dc.date.issued2013
dc.description.abstractThe top quark is the heaviest fermion observed to date. A precise measurement of its mass and W boson mass is important to indirect measurements of Higgs boson mass. Furthermore, the top quark mass, W boson mass and Higgs boson mass may test the Standard Model using the correlations between them. Here in this thesis, we present a measurement of the top quark mass in the all hadronic final state using the template method. This final state has the advantage of being fully reconstructed in the detector and having the largest branching fraction. The measurement is performed on 4033 candidate events collected using the DØ detector. The data is collected from ppbar collisions generated at sqrt(s) =1.96 GeV by the TEVATRON accelerator, Fermi National Accelerator Laboratory, Batavia IL. This is a two dimensional measurement formulated to extract the top quark mass as well as lower the systematic uncertainty due to the jet energy scale calibration. A kinematic fitter is employed to build the templates of signal and background for various input top quark mass points and jet energy scale variations. These templates are compared to data to obtain the fitted top quark mass, jet energy scale shift and their uncertainties. The obtained top quark mass is mt = 170.4 ± 1.7 (stat) ± 2.9 (sys) GeV.
dc.format.extent142 pages
dc.format.mediumapplication.pdf
dc.identifier99197742902042
dc.identifier.urihttps://hdl.handle.net/11244/318701
dc.languageen_US
dc.relation.requiresAdobe Acrobat Reader
dc.subjectQuarks
dc.subjectMass (Physics)--Measurement
dc.subjectHadron colliders
dc.subjectHiggs bosons
dc.thesis.degreePh.D.
dc.titleMEASUREMENT OF THE TOP QUARK MASS IN THE ALL HADRONIC FINAL STATE AT THE DØ EXPERIMENT
dc.typetext
dc.typedocument
ou.groupCollege of Arts and Sciences::Homer L. Dodge Department of Physics and Astronomy

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
JAYASINGHE_ou_0169D_11072.pdf
Size:
3.44 MB
Format:
Adobe Portable Document Format
Download

Collections

OU - Dissertations