$W$ boson polarization measurement in the $t\bar{t}$ dilepton channel using the CDF II Detector - INSPIRE

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$W$ boson polarization measurement in the $t\bar{t}$ dilepton channel using the CDF II Detector

CDF

Collaboration

May, 2012

7 pages

Published in:

Phys.Lett.B 722 (2013) 48-54

Published: May 13, 2013

e-Print:

1205.0354 [hep-ex]

DOI:

10.1016/j.physletb.2013.03.032

Report number:

FERMILAB-PUB-12-114-E

Experiments:

FNAL-E-0830

View in:

reference search16 citations

Citations per year

Abstract: (Elsevier)

We present a measurement of the W-boson polarization in top-quark decays in tt@? events with decays to dilepton final states using data corresponding to 5.1 fb^-^1 of integrated luminosity in pp@? collisions collected by the CDF II detector at the Tevatron. Assuming a top-quark mass of 172.5 GeV/c^2, a simultaneous measurement of the fractions of longitudinal (f_0) and right-handed (f_+) W-bosons yields the results f_0=0.70_-_0_._1_7^+^0^.^1^8(stat)+/-0.06(syst) and f_+=-0.09+/-0.09(stat)+/-0.03(syst). Combining this measurement with our previous measurement based on single-lepton final states, we obtain f_0=0.84+/-0.09(stat)+/-0.05(syst) and f_+=-0.16+/-0.05(stat)+/-0.04(syst). The results are consistent with the standard model expectation.

12.15.Ji
13.38.Be
13.88.+e
14.65.Ha
W: polarization
top: pair production
dilepton: final state
boson: yield
CDF
anti-p p: interaction

References(21)

Figures(3)

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