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Search for right-handed W bosons in top quark decay

DO Collaboration, The and Bertram, Iain A. and Borissov, Guennadi V. and Ratoff, Peter N. and Sopczak, Andre (2005) Search for right-handed W bosons in top quark decay. Physical Review D, 72 (1). 011104. ISSN 1550-7998

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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[overline t] 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[overline p] Collider at sqrt(s)=1.96 TeV. We use a constrained fit to reconstruct the kinematics of the t[overline t] and decay products, which allows for the measurement of the leptonic decay angle theta* for each event. By comparing the costheta* 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+=3.6×10-4.

Item Type: Article
Journal or Publication Title: Physical Review D
Additional Information: Author list is partial - see original article for full author list
Uncontrolled Keywords: intermediate boson production ; quark decay ; elementary particle jets ; proton-proton inclusive interactions ; meson leptonic decay ; standard model ; high-energy elementary particle interactions
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 10096
Deposited By: Ms Margaret Calder
Deposited On: 03 Jul 2008 20:22
Refereed?: Yes
Published?: Published
Last Modified: 15 Mar 2016 01:02
Identification Number:

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