Z BRANCHING FRACTIONS AND THE TOP MASS

1990 ◽  
Vol 05 (13) ◽  
pp. 1001-1005 ◽  
Author(s):  
R. D. PECCEI
Keyword(s):  
Narrow Range ◽  
Branching Fractions ◽  
Precision Measurements ◽  
Radiative Corrections ◽  
Electroweak Radiative Corrections ◽  
200 Gev ◽  
Top Mass

Recent data from LEP on the hadronic and leptonic branching fractions of the Z0 favors a narrow range for the top mass around 200 GeV. These results are consistent with other precision measurements sensitive to the electroweak radiative corrections.

scholarly journals THE STANDARD MODEL AND PROTON-ANTIPROTON COLLIDERS IN THE ACOL/TEV I ERA

1988 ◽  
Vol 03 (05) ◽  
pp. 1051-1079 ◽  
Author(s):  
J.R. CUDELL ◽  
F. HALZEN ◽  
C.S. KIM
Keyword(s):  
Large Fraction ◽  
Collider Physics ◽  
Hadron Colliders ◽  
Proton Antiproton ◽  
Electroweak Radiative Corrections ◽  
The Standard Model ◽  
200 Gev ◽  
Indirect Information ◽  
Near Future ◽  
Top Mass

[Formula: see text] collider physicists must in the near future face the question: Is there life after Tristan, SLC, LEP, and HERA? We review the main topics of [Formula: see text] collider physics (jets, weak bosons, and heavy quarks) concentrating on physics issues unique to hadron colliders. We emphasize the search for top. After reviewing indirect information on the top mass (from electroweak radiative corrections, ratio of W(→eν) and Z(→e+e−) events and [Formula: see text] mixing) we discuss the unique opportunity to search a large fraction of the expected range 25 GeV <mt<200 GeV in higher energy (TEV I) and higher luminosity (ACOL) experiments.

HIGGS PROPAGATOR IN THE PRESENCE OF STRONG DYNAMICS IN THE ELECTROWEAK SECTOR

2000 ◽  
Vol 15 (24) ◽  
pp. 1483-1490
Author(s):  
BIPIN R. DESAI ◽  
ALEXANDER R. VAUCHER
Keyword(s):  
Yukawa Coupling ◽  
Higgs Mass ◽  
Scattering Amplitude ◽  
Precision Measurements ◽  
The Standard Model ◽  
200 Gev ◽  
Low Mass ◽  
Electroweak Sector ◽  
Top Mass ◽  
Compositeness Scale

The Higgs propagator, in the presence of strong top-Yukawa coupling, is expressed in the form of dispersion integrals so that unitarity in top–antitop scattering amplitude is maintained. It is found that a large top-Yukawa coupling lowers the Higgs mass from the condensate-model value of twice the top mass (≈350 GeV) to 100–200 GeV consistent with the Z0 width precision measurements. The coupling is found to be ≈3.7 at the top-mass, much larger than the Standard Model value ≈1. It corresponds to a compositeness scale ≈1.4 TeV, which is consistent with top-color models. A second scalar state around 1 TeV also emerges as a solution in combination with the low mass Higgs.

scholarly journals DO PRESENT LEP DATA PROVIDE EVIDENCE FOR ELECTROWEAK CORRECTIONS?

1993 ◽  
Vol 08 (27) ◽  
pp. 2529-2538 ◽  
Author(s):  
V.A. NOVIKOV ◽  
L.B. OKUN ◽  
M.I. VYSOTSKY
Keyword(s):  
Top Quark ◽  
Precision Measurements ◽  
Positive Contribution ◽  
Virtual Particles ◽  
Electroweak Radiative Corrections ◽  
Upper Limits ◽  
Electroweak Precision ◽  
Lower Limits ◽  
Top Mass ◽  
Electroweak Corrections

The Born approximation, based on [Formula: see text] instead of α, reproduces all electroweak precision measurements within their (1σ) accuracy. The low upper limits for the genuinely electroweak corrections constitute one of the major achievements of LEP. The astonishing smallness of these corrections results from the cancellation of a large positive contribution from the heavy top quark and large negative contributions from all other virtual particles. It is precisely the non-observation of electroweak radiative corrections that places stringent upper and lower limits on the top mass.

scholarly journals PARITY VIOLATING ASYMMETRIES AT FUTURE LEPTON COLLIDERS

1998 ◽  
Vol 13 (14) ◽  
pp. 2235-2244 ◽  
Author(s):  
ANDRZEJ CZARNECKI ◽  
WILLIAM J. MARCIANO
Keyword(s):  
Short Distance ◽  
High Energy ◽  
Precision Measurements ◽  
Radiative Corrections ◽  
Polarized Beams ◽  
Electroweak Radiative Corrections ◽  
Lepton Colliders

Parity violating left–right scattering asymmetries at future high energy e+e- and e-e- colliders are examined. The utility of two polarized beams for precision measurements is pointed out. Sensitivity to "new" short–distance physics is briefly discussed. Electroweak radiative corrections due to the running of sin 2θW·(q2) are exhibited.

scholarly journals One-loop electroweak radiative corrections to polarized e+e−→ZH

2019 ◽  
Vol 100 (7) ◽  
Author(s):  
S. Bondarenko ◽  
Ya. Dydyshka ◽  
L. Kalinovskaya ◽  
L. Rumyantsev ◽  
R. Sadykov ◽  
...  
Keyword(s):  
Radiative Corrections ◽  
Electroweak Radiative Corrections

scholarly journals Walking technicolor and electroweak radiative corrections

1993 ◽  
Vol 391 (1-2) ◽  
pp. 127-146 ◽  
Author(s):  
Raman Sundrum ◽  
Stephen D.H. Hsu
Keyword(s):  
Radiative Corrections ◽  
Electroweak Radiative Corrections
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