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- Abazov, V. M. (author)
Search for right-handed W bosons in top quark decay
- Article/chapterEnglish2005
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- 2005
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:kth-37827
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37827URI
- https://doi.org/10.1103/PhysRevD.72.011104DOI
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- Language:English
- Summary in:English
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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 (t) over bar 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 (p) over bar Collider at root s=1.96 TeV. We use a constrained fit to reconstruct the kinematics of the t (t) over bar and decay products, which allows for the measurement of the leptonic decay angle theta(*) for each event. By comparing the cos theta(*) 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 x 10(-4).
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- NATURVETENSKAP Fysik hsv//swe
- NATURAL SCIENCES Physical Sciences hsv//eng
- Physics
- Fysik
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- Åsman, Barbro (author)
- Clément, Christophe (author)
- Gollub, Nils (author)
- Lager, Sara (author)
- Strandberg, Jonas (author)
- Zverev, E.G. (author)
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- In:Physical Review D72:1, s. 011104-1550-79981550-2368
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