EFFECTS OF THE W-BOSON WIDTH IN e+e−→W+W− REACTIONS

1986 ◽  
Vol 01 (03) ◽  
pp. 203-210 ◽  
Author(s):  
T. MUTA ◽  
R. NAJIMA ◽  
S. WAKAIZUMI
Keyword(s):  
Cross Section ◽  
W Boson ◽  
Precise Determination ◽  
Boson Mass ◽  
Finite Width ◽  
Threshold Region ◽  
Width Effect ◽  
Higher Order Corrections ◽  
Proper Account

The total cross section for the process e+e−→W+W− followed by subsequent W-boson decays is calculated in the tree approximation by taking proper account of the W-boson width. It is found that the cross section is considerably modified by the finite-width effect in the threshold region, thus affecting the precise determination of the W-boson mass by experimental data. The effect of higher-order corrections is also considered.

scholarly journals Experimental Assessment of the Depth of the Deformed Layer in the Roller Burnishing Process

2019 ◽  
Vol 290 ◽  
pp. 03008
Author(s):  
Marek Kowalik ◽  
Tomasz Trzepiecinski
Keyword(s):  
Cross Section ◽  
Precise Determination ◽  
Roller Burnishing ◽  
Elastic Zone ◽  
Original Measurement ◽  
The Face ◽  
Burnishing Process ◽  
Deformed Layer ◽  
Slight Deformation

This paper presents the methods of experimental determining the depth of the plastically deformed top layer in the roller burnishing process. Precise determination of the depth of the plastically deformed layer is difficult due to slight deformation at the boundary of the plastic and elastic zone, the lack of visible changes in the microstructure, and minimal changes in microhardness. The article shows the method of original measurement method that consists in determining the thickness of the deformed layer using rings. The method involves the profilographometric measurements of the disconnected rings (samples) which are flat-faced in the package on the mandrel. The rings material deforms plastically in the surface layer causing wrapping of the end face of the ring in the direction of the rolling tool movement. After dismantling the ring pack, measurements were made on the face of each ring along radial directions, and the thickness of the deformed layer was observed on the microscope. The method was verified by microhardness measurements in the cross-section and cross-section of the ring. The results of deformation depth measurements were verified by finite-element-based numerical simulation.

scholarly journals Nonperturbative Uncertainties on the Transverse Momentum Distribution of Electroweak Bosons and on the Determination of the W Boson Mass at the LHC

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Giuseppe Bozzi ◽  
Andrea Signori
Keyword(s):  
Transverse Momentum ◽  
W Boson ◽  
Direct Determination ◽  
Boson Mass ◽  
Proton Proton ◽  
Theoretical Predictions ◽  
Quark Transverse Momentum ◽  
The Impact ◽  
Proton Proton Collisions

In this contribution we present an overview of recent results concerning the impact of a possible flavour dependence of the intrinsic quark transverse momentum on electroweak observables. In particular, we focus on the qT spectrum of electroweak gauge bosons produced in proton-proton collisions at the LHC and on the direct determination of the W boson mass. We show that these effects are comparable in size to other nonperturbative effects commonly included in phenomenological analyses and should thus be included in precise theoretical predictions for present and future hadron colliders.

scholarly journals Electroweak measurements from W, Z and photon final states

2014 ◽  
Vol 31 ◽  
pp. 1460276
Author(s):  
Hang Yin ◽  
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Z Boson ◽  
W Boson ◽  
Charge Asymmetry ◽  
Distribution Functions ◽  
Boson Mass ◽  
Electroweak Theory ◽  
Final States ◽  
Parton Distribution Functions

We present the most recent precision electroweak measurements of single W and Z boson cross section and properties from the LHC and Tevatron colliders, analyzing data collected by ATLAS, CDF, CMS, D0, and LHCb detectors. The results include the measurement of the single W and Z boson cross section at LHC, the differential cross section measurements, the measurement of W boson mass, the measurement of W and Z charge asymmetry. These measurements provide precision tests on the electroweak theory, high order predictions and the information can be used to constraint parton distribution functions.

scholarly journals MEASUREMENT OF THE W BOSON MASS AND WIDTH IN DELPHI AT LEP

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 284-286 ◽  
Author(s):  
◽  
MARTIJN MULDERS
Keyword(s):  
W Boson ◽  
Center Of Mass ◽  
Final Analysis ◽  
Systematic Errors ◽  
Boson Mass ◽  
Delphi Collaboration ◽  
Delphi Analysis

A measurement of the W boson mass and width has been performed by the DELPHI collaboration. During the years 1997-1999 DELPHI collected data with an interrated luminosity of 435 pb-1 at center-of-mass energies ranging from 183 to 202 GeV. LEP is currently running at energies up to 208 GeV. The DELPHI analysis and preliminary numbers presented at ICHEP 2000, Osaka, are discussed and an overview is given of improvements in statistical sensitivity and determination of systematic errors to be expected for the final analysis of the total LEP2 data sample.

scholarly journals Towards the high-accuracy determination of the238U fission cross section at the threshold region at CERN – n_TOF

2016 ◽  
Vol 111 ◽  
pp. 02002 ◽  
Author(s):  
M. Diakaki ◽  
L. Audouin ◽  
E. Berthoumieux ◽  
M. Calviani ◽  
N. Colonna ◽  
...  
Keyword(s):  
Cross Section ◽  
Fission Cross Section ◽  
High Accuracy ◽  
Threshold Region ◽  
Accuracy Determination

A Precise Determination of the Total Cross Section of Uranium-235 from 0.000818 ev to 0.0818 ev

1959 ◽  
Vol 6 (5) ◽  
pp. 433-440 ◽  
Author(s):  
G. J. Safford ◽  
W. W. Havens ◽  
B. M. Rustad
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Precise Determination
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