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Helicity of the W boson in lepton +jets t ¯t events

Research output: Contribution to journalJournal article

Published

Journal publication date26/06/2005
JournalPhysics Letters B
Journal number1-2
Volume617
Number of pages10
Pages1-10
Original languageEnglish

Abstract

We examine properties of candidate events in lepton + jets final states to establish the helicities of W bosons in t→W+b decays. Our analysis is based on a direct calculation of a probability density for each event to correspond to a final state, as a function of the helicity of the W boson. Using the 125 events/pb of data collected by the DØ experiment at the Fermilab Tevatron Collider at , we obtain a longitudinal helicity fraction F0=0.56±0.31, consistent with the prediction of F0=0.70 from the standard model.

Bibliographic note

Author list is partial - see original article for full author list.