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Helicity of the W boson in lepton + jets tt̄ events

Abstract:

We examine properties of tt̄ 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 tt̄ 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 pp̄ Collider at s=1.8 TeV, we obtain a longitudinal helicity fraction F0=0.56±0.31, consistent with the pred...

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Authors


Abazov, VM More by this author
Abdesselam, A More by this author
Abolins, M More by this author
Abramov, V More by this author
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Journal:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume:
617
Issue:
1-2
Pages:
1-10
Publication date:
2005-06-23
DOI:
ISSN:
0370-2693
URN:
uuid:8d272f42-b6be-4153-854c-bcabee04d93d
Source identifiers:
178303
Local pid:
pubs:178303
Language:
English

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