Search for right-handed W bosons in top quark decay

Abazov, V. M. ; Mondal, N. K. ; et., al (2005) Search for right-handed W bosons in top quark decay Physical Review D - Particles, Fields, Gravitation and Cosmology, 72 (1). e011104_1- e011104_8. 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 tt̅ 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 pp̅ Collider at √s=1.96 TeV. We use a constrained fit to reconstruct the kinematics of the tt̅ and decay products, which allows for the measurement of the leptonic decay angle θ* for each event. By comparing the cosθ* 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
Source:Copyright of this article belongs to The American Physical Society.
ID Code:76173
Deposited On:31 Dec 2011 08:16
Last Modified:31 Dec 2011 08:16

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