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Measurement of the W boson helicity in top quark decay at D0.

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Measurement of the W boson helicity in top quark decay at D0. / Abazov, V. M.; Bertram, Iain; Borissov, Guennadi et al.
In: Physical Review D, Vol. 75, 2007, p. 031102.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Abazov VM, Bertram I, Borissov G, Fox H, Ratoff P, Sopczak A. Measurement of the W boson helicity in top quark decay at D0. Physical Review D. 2007;75:031102. doi: 10.1103/PhysRevD.75.031102

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Abazov, V. M. ; Bertram, Iain ; Borissov, Guennadi et al. / Measurement of the W boson helicity in top quark decay at D0. In: Physical Review D. 2007 ; Vol. 75. pp. 031102.

Bibtex

@article{93d2c328b4d64026a9424a80220d4f76,
title = "Measurement of the W boson helicity in top quark decay at D0.",
abstract = "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[overline t] events in the [script-l]+jets and dilepton decay channels corresponding to an integrated luminosity of 370 pb-1 collected by the D0 detector at the Fermilab Tevatron p[overline p] Collider at sqrt(s)=1.96 TeV. We reconstruct the decay angle theta* for each lepton. By comparing the costheta* distribution from the data with that for the expected background and signal for various values of f+ (where we assume that the fraction of longitudinally-polarized W bosons has the standard model value of 0.70), we find f+=0.056±0.080(stat)±0.057(syst) (f+<0.23 at 95% C.L.), consistent with the standard model prediction of f+=3.6×10-4.",
author = "Abazov, {V. M.} and Iain Bertram and Guennadi Borissov and Harald Fox and Peter Ratoff and Andre Sopczak",
year = "2007",
doi = "10.1103/PhysRevD.75.031102",
language = "English",
volume = "75",
pages = "031102",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Measurement of the W boson helicity in top quark decay at D0.

AU - Abazov, V. M.

AU - Bertram, Iain

AU - Borissov, Guennadi

AU - Fox, Harald

AU - Ratoff, Peter

AU - Sopczak, Andre

PY - 2007

Y1 - 2007

N2 - 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[overline t] events in the [script-l]+jets and dilepton decay channels corresponding to an integrated luminosity of 370 pb-1 collected by the D0 detector at the Fermilab Tevatron p[overline p] Collider at sqrt(s)=1.96 TeV. We reconstruct the decay angle theta* for each lepton. By comparing the costheta* distribution from the data with that for the expected background and signal for various values of f+ (where we assume that the fraction of longitudinally-polarized W bosons has the standard model value of 0.70), we find f+=0.056±0.080(stat)±0.057(syst) (f+<0.23 at 95% C.L.), consistent with the standard model prediction of f+=3.6×10-4.

AB - 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[overline t] events in the [script-l]+jets and dilepton decay channels corresponding to an integrated luminosity of 370 pb-1 collected by the D0 detector at the Fermilab Tevatron p[overline p] Collider at sqrt(s)=1.96 TeV. We reconstruct the decay angle theta* for each lepton. By comparing the costheta* distribution from the data with that for the expected background and signal for various values of f+ (where we assume that the fraction of longitudinally-polarized W bosons has the standard model value of 0.70), we find f+=0.056±0.080(stat)±0.057(syst) (f+<0.23 at 95% C.L.), consistent with the standard model prediction of f+=3.6×10-4.

U2 - 10.1103/PhysRevD.75.031102

DO - 10.1103/PhysRevD.75.031102

M3 - Journal article

VL - 75

SP - 031102

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

ER -