uu.seUppsala University Publications
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(p)over-bar collision data
Show others and affiliations
2011 (English)In: Physical Review D - Particles, Fields, Gravitation and Cosmology, 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 t (t) over bar 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 p (p) over bar collider. We measure the fractions of longitudinal and right-handed W bosons to be f(0) = 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 f(0) 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
Physical Sciences
URN: urn:nbn:se:uu:diva-148996DOI: 10.1103/PhysRevD.83.032009ISI: 000287486700001OAI: oai:DiVA.org:uu-148996DiVA: diva2:403653
Available from: 2011-03-14 Created: 2011-03-14 Last updated: 2013-03-01Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
High Energy Physics
Physical Sciences

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: 170 hits
ReferencesLink to record
Permanent link

Direct link