Search for right-handed W bosons in top quark decay
2005 (English)In: Physical Review D, ISSN 1550-7998, Vol. 72, no 1, 011104- p.Article in journal (Refereed) Published
We present a measurement of the fraction f(+) of right-handed W bosons produced in top quark decays, based on a candidate sample of t (t) over bar events in the lepton+jets decay mode. These data correspond to an integrated luminosity of 230 pb(-1), collected by the D0 detector at the Fermilab Tevatron p (p) over bar Collider at root s=1.96 TeV. We use a constrained fit to reconstruct the kinematics of the t (t) over bar and decay products, which allows for the measurement of the leptonic decay angle theta(*) for each event. By comparing the cos theta(*) distribution from the data with those for the expected background and signal for various values of f(+), we find f(+)=0.00 +/- 0.13(stat)+/- 0.07(syst). This measurement is consistent with the standard model prediction of f(+)=3.6 x 10(-4).
Place, publisher, year, edition, pages
2005. Vol. 72, no 1, 011104- p.
IdentifiersURN: urn:nbn:se:kth:diva-37827DOI: 10.1103/PhysRevD.72.011104ISI: 000230889400004ScopusID: 2-s2.0-26944500592OAI: oai:DiVA.org:kth-37827DiVA: diva2:435297