Change search
ReferencesLink to record
Permanent link

Direct link
Measurement of the W Boson Helicity in Top Quark Decays Using 5.4 fb-1 of $p\bar{p}$ Collision Data
Stockholm University, Faculty of Science, Department of Physics.
2011 (English)In: Physical Review D, ISSN 1550-7998, Vol. 83, no 3, 032009- p.Article in journal (Refereed) Published
Abstract [en]

We present a measurement of the helicity of the W boson produced in top quark decays using tt̅ decays in the ℓ+jets and dilepton final states selected from a sample of 5.4  fb-1 of collisions recorded using the D0 detector at the Fermilab Tevatron pp̅ collider. We measure the fractions of longitudinal and right-handed W bosons to be f0=0.669±0.102[±0.078(stat.)±0.065(syst.)] and f+=0.023±0.053[±0.041(stat.)±0.034(syst.)], respectively. This result is consistent at the 98% level with the standard model. A measurement with f0 fixed to the value from the standard model yields f+=0.010±0.037[±0.022(stat.)±0.030(syst.).].

Place, publisher, year, edition, pages
2011. Vol. 83, no 3, 032009- p.
National Category
Subatomic Physics
Research subject
URN: urn:nbn:se:su:diva-62692DOI: 10.1103/PhysRevD.83.032009ISI: 000287486700001OAI: diva2:443991
Swedish Research Council
Publikationen har totalt 429 författare, V. Abazov et al.Available from: 2011-09-27 Created: 2011-09-27 Last updated: 2012-01-26Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Åsman, Barbro
By organisation
Department of Physics
In the same journal
Physical Review D
Subatomic Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 26 hits
ReferencesLink to record
Permanent link

Direct link