scholarly journals Direct measurement of the W boson decay width in proton-antiproton collisions at √s = 1.96-TeV

2004 ◽  
Author(s):  
Jun-jie Zhu
Keyword(s):  
Decay Width ◽  
Direct Measurement ◽  
W Boson ◽  
Proton Antiproton

DIRECT MEASUREMENT OF THE W WIDTH IN $p{\bar p}$ COLLISIONS AT $\sqrt{s} = 1.96~{\rm TEV}$

2005 ◽  
Vol 20 (15) ◽  
pp. 3243-3252
Author(s):  
JUNJIE ZHU
Keyword(s):  
Decay Width ◽  
Direct Measurement ◽  
W Boson ◽  
Mass Region ◽  
Transverse Mass ◽  
Tail Region ◽  
Total Decay Width ◽  
Tevatron Collider ◽  
Mass Distributions ◽  
200 Gev

This paper describes a direct measurement of the W boson total decay width ΓW using the DØ detector at the Fermilab Tevatron Collider. The measurement uses an integrated luminosity of 177.3 pb-1, collected during the 2002-2003 run. The width is determined by normalizing the predicted signal and background transverse mass distributions to 75,285 W → eν candidates in the transverse mass region 50 < MT < 100 GeV and then fitting the predicted shape to the 625 candidates in the tail region 100 < MT < 200 GeV . The W width is determined to be ΓW = 2.011 ± 0.093 ( stat ) ± 0.107 ( syst ) GeV .

The sircular polarization of γ-quanta in the radiative decay H Þ`ffγ (II)

2021 ◽  
pp. 134-141
Author(s):  
S.K. Abdullayev ◽  
◽  
E.Sh. Omarova ◽  
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Circular Polarization ◽  
Invariant Mass ◽  
Decay Width ◽  
Radiative Decay ◽  
W Boson ◽  
Decay Channel ◽  
Fermion Pair ◽  
The Standard Model

Within the framework of the Standard Model, the radiative decay channel of the Higgs boson into fermion-antifermion pair is investigated: H Þ` ff γ. Taking into account the fermion and W -boson loop diagrams an analytical expression for the decay width is obtained, the circular polarization of the γ-quanta is studied in dependence of the angle θ and invariant mass of the fermion pair.

PROPERTIES OF THE W BOSON FROM THE FERMILAB TEVATRON

1995 ◽  
Vol 10 (31) ◽  
pp. 4413-4467 ◽  
Author(s):  
SACHA E. KOPP
Keyword(s):  
Perturbative Qcd ◽  
Decay Width ◽  
Top Quark ◽  
W Boson ◽  
Vector Boson ◽  
Branching Ratios ◽  
Experimental Knowledge ◽  
Intermediate Vector ◽  
Intermediate Vector Boson

The experimental knowledge of the charged intermediate vector boson, the W, is reviewed. Measurements of the electroweak properties of the W boson, such as its mass, decay width, couplings to fermions, and leptonic branching ratios, are summarized. As well, I review production properties of the W as measured in [Formula: see text] collisions and how they can be used as tests of perturbative QCD. I also discuss new particle searches that make use of the W signature, such as new charged electroweak bosons and the now-confirmed discovery of the top quark.

scholarly journals Impact of the W boson decay width on photon bremsstrahlung accompanying W pair production

2000 ◽  
Vol 18 (1) ◽  
pp. 73-82 ◽  
Author(s):  
A.P. Chapovsky ◽  
V.A. Khoze ◽  
W.J. Stirling
Keyword(s):  
Pair Production ◽  
Decay Width ◽  
W Boson

scholarly journals Direct Measurement of the Total Decay Width of the Top Quark

2013 ◽  
Vol 111 (20) ◽  
Author(s):  
T. Aaltonen ◽  
S. Amerio ◽  
D. Amidei ◽  
A. Anastassov ◽  
A. Annovi ◽  
...  
Keyword(s):  
Decay Width ◽  
Direct Measurement ◽  
Top Quark ◽  
Total Decay Width

MEASUREMENT OF THE ANGULAR DISTRIBUTION OF ELECTRONS FROM W→eν DECAYS OBSERVED IN $p\bar p$ COLLISIONS AT $\sqrt{s} =1.8\, {\rm TeV}$

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 318-321
Author(s):  
◽  
GEORG STEINBRÜCK
Keyword(s):  
Angular Distribution ◽  
Transverse Momentum ◽  
Perturbative Qcd ◽  
W Boson ◽  
Mass Measurement ◽  
Polar Angle ◽  
Distribution Parameter ◽  
Boson Mass ◽  
Leading Order ◽  
Proton Antiproton

We present the first measurement of the electron angular distribution parameter α2 in W → e ν events in proton-antiproton collisions as a function of the W boson transverse momentum. Our analysis is based on data collected using the DØ detector during the 1994–1995 Fermilab Tevatron run. We compare our results with next-to-leading order perturbative QCD, which predicts an angular distribution of (1 ± α1 cos θ* + α2 cos 2 θ*), where θ* is the polar angle of the electron in the Collins-Soper frame and α1 and α2 are functions of [Formula: see text], the W boson transverse momentum. This measurement provides a test of next-to-leading order QCD corrections which are a non-negligible contrbution to the W boson mass measurement.

MEASUREMENTS OF THE W AND Z PRODUCTION CROSS SECTIONS TIMES THE LEPTONIC BRANCHING RATIOS AT THE FERMILAB TEVATRON

2005 ◽  
Vol 20 (15) ◽  
pp. 3225-3229
Author(s):  
VICTORIA MARTIN
Keyword(s):  
Decay Width ◽  
Cross Sections ◽  
W Boson ◽  
Production Cross ◽  
Z Bosons ◽  
Branching Ratios ◽  
Total Decay Width ◽  
The Cross ◽  
Using Data

We report measurements of inclusive cross sections times branching ratios in electrons, muons or taus for W and Z bosons produced in [Formula: see text] collisions at 1.96 TeV using data collected with the DØ and CDF detectors in 2002-2004. Using the ratio of the cross sections times branching ratios for the W and Z bosons we also obtain constraints on the total decay width of the W boson.

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