A Direct measurement of the $W$ boson width in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96-TeV - INSPIRE

DataBETA

A Direct measurement of the $W$ boson width in $p \bar{p}$ collisions at $\sqrt{s}$ = 1.96-TeV

CDF

Collaboration

Oct, 2007

7 pages

Published in:

Phys.Rev.Lett. 100 (2008) 071801

e-Print:

0710.4112 [hep-ex]

DOI:

10.1103/PhysRevLett.100.071801

PDG:

{{\mathit W}}

Report number:

FERMILAB-PUB-07-563-E

Experiments:

FNAL-E-0830

View in:

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Abstract: (arXiv)

A direct measurement of the total decay width of the W boson G_W is presented using 350 pb-1 of data from ppbar collisions at sqrt(s) = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The width is determined by normalizing predicted signal and background distributions to 230185 W candidates decaying to enu and munu in the transverse-mass region 50 < M_T < 90 GeV and then fitting the predicted shape to 6055 events in the high-M_T region, 90 < M_T < 200 GeV. The result is G_W = 2032 +/- 45 (stat.) +/- 57 (syst.) MeV, consistent with the standard model expectation.

Note:

submitted to Phys. Rev. Lett. Version 3: update with PRL reviewer comments

13.38.Be
14.70.Fm
anti-p p: colliding beams
W: hadroproduction
W: width
W: leptonic decay
background
mass spectrum: transverse
electroweak interaction: standard model
CDF

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Figures(0)

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