Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Top quarks at the Tevatron: Measurements of the top quark production and decay with the D0 experiment
Stockholms universitet.ORCID iD: 0000-0002-8913-0981
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis presents two measurements of the top quark using 230 pb-1 of data taken with the D0 detector at the Tevatron accelerator. The first measurement determines the top pair production cross section at sqrt(s)=1.96 TeV in proton-antiproton collisions. In the standard model of particle physics the top quark decays almost exclusively into a W boson and a b quark. Candidate events are selected by requiring that at least one jet in the event is tagged with the secondary vertex algorithm. The measured top pair production cross section is:

8.6 +1.6-1.5 (stat. + syst.) +- 0.6 (lumi.) pb.

The second measurement uses the observed and predicted number of events with 0, 1 and 2 b-tagged jets to estimate the ratio R:

R = B(t->Wb) / B(t->Wq)

where q stands for any down-type quark. The measured value is

R = 1.03 +0.19-0.17 (stat. + syst.)

in good agreement with the standard model prediction of R=1. The result can be used to obtain a lower limit for R:

R > 0.61 (95% C.L.).

Place, publisher, year, edition, pages
Fysikum , 2006. , 149 p.
Keyword [en]
elementary particle physics, D0, Tevatron, top quark
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-84528ISBN: 91-7155-222-7 (print)OAI: oai:DiVA.org:kth-84528DiVA: diva2:499532
Public defence
2006-03-24, sal FA31, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 13:00
Opponent
Supervisors
Note
QC 20120529Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2012-05-29Bibliographically approved

Open Access in DiVA

No full text

Authority records BETA

Strandberg, Jonas

Search in DiVA

By author/editor
Strandberg, Jonas
Subatomic Physics

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 195 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf