Abstract
We use the transverse momentum spectrum of leptons in the decay chain with to measure the helicity of the bosons in the top quark rest frame. Our measurement uses a sample isolated in of data collected in collisions at with the CDF detector at the Fermilab Tevatron. Assuming a standard weak decay, we find that the fraction of 's with zero helicity in the top rest frame is , consistent with the standard model prediction of for a top mass of .
- Received 26 August 1999
DOI:https://doi.org/10.1103/PhysRevLett.84.216
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