INDIRECT CONSTRAINTS ON THE TRIPLE GAUGE BOSON COUPLINGS FROM $\bm{Z\to b{\bar b}}$ PARTIAL WIDTH: AN UPDATE

2000 ◽  
Vol 15 (01) ◽  
pp. 1-7 ◽  
Author(s):  
O. J. P. ÉBOLI ◽  
M. C. GONZALEZ-GARCIA ◽  
S. F. NOVAES
Keyword(s):  
Gauge Boson ◽  
Partial Width ◽  
Boson Mass ◽  
Higgs Boson Mass ◽  
Present Value ◽  
Triple Gauge Couplings ◽  
The Standard Model ◽  
Model Predictions ◽  
Anomalous Triple Gauge Couplings ◽  
Gauge Boson Couplings

We update the indirect bounds on anomalous triple gauge couplings coming from the non-universal one-loop contributions to the [Formula: see text] width. These bounds, which are independent of the Higgs boson mass, are in agreement with the standard model predictions for the gauge boson self-couplings since the present value of Rb agrees fairly well with the theoretical estimates. Moreover, these indirect constraints on [Formula: see text] and [Formula: see text] are most stringent than the present direct bounds on these quantities, while the indirect limit on λZ is weaker than the available experimental data.

scholarly journals Anomalous gauge-boson couplings and the Higgs-boson mass

2005 ◽  
Vol 42 (2) ◽  
pp. 139-161 ◽  
Author(s):  
O. Nachtmann ◽  
F. Nagel ◽  
M. Pospischil
Keyword(s):  
Higgs Boson ◽  
Gauge Boson ◽  
Boson Mass ◽  
Higgs Boson Mass ◽  
Gauge Boson Couplings

CHARGED TGC FROM 1999 DELPHI DATA

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 299-301
Author(s):  
DIMITRIS FASSOULIOTIS
Keyword(s):  
Standard Model ◽  
Gauge Boson ◽  
Final States ◽  
Dipole Coupling ◽  
Quadrupole Coupling ◽  
The Standard Model ◽  
Model Predictions ◽  
Gauge Boson Couplings

Measurements of the trilinear gauge boson couplings WWγ and WWZ are presented from data taken by DELPHI in 1999 at an energy ranging from 192 to 202 GeV. Values are extracted with respect to [Formula: see text] and Δ κγ, the differences of the WWZ charge coupling and of the WWγ dipole coupling from their Standard Model values, and λγ, the WWγ quadrupole coupling. The study uses data from the final states jjℓν, jjjj, ℓX, jjX and γX, where j represents a quark jet, l an identified lepton and X missing four-momentum. The observations are consistent with the Standard Model predictions.

scholarly journals Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
A. M. Sirunyan ◽  
◽  
A. Tumasyan ◽  
W. Adam ◽  
T. Bergauer ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Confidence Level ◽  
Branching Fraction ◽  
Vector Boson ◽  
Boson Mass ◽  
Higgs Boson Mass ◽  
Vector Boson Fusion ◽  
Upper Limit ◽  
The Standard Model

Abstract A search is presented for a Higgs boson that is produced via vector boson fusion and that decays to an undetected particle and an isolated photon. The search is performed by the CMS collaboration at the LHC, using a data set corresponding to an integrated luminosity of 130 fb−1, recorded at a center-of-mass energy of 13 TeV in 2016–2018. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for production via vector boson fusion and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a Higgs boson mass of 125 GeV, assuming the standard model production rates, the observed (expected) 95% confidence level upper limit on the branching fraction is 3.5 (2.8)%. This is the first search for such decays in the vector boson fusion channel. Combination with a previous search for Higgs bosons produced in association with a Z boson results in an observed (expected) upper limit on the branching fraction of 2.9 (2.1)% at 95% confidence level.

scholarly journals Diboson production at LHC and Tevatron

2014 ◽  
Vol 31 ◽  
pp. 1460279 ◽  
Author(s):  
Jian Wang ◽  
Keyword(s):  
Standard Model ◽  
Center Of Mass ◽  
Mass Energy ◽  
Diboson Production ◽  
Center Of Mass Energy ◽  
Triple Gauge Couplings ◽  
Model Predictions ◽  
Energy Formula ◽  
Anomalous Triple Gauge Couplings ◽  
8 Tev

This is a report at the conference Physics In Collision 2013. The experimental results on physics of diboson production are reviewed. The measurements use pp collision at the LHC with center-of-mass energy [Formula: see text] and 8 TeV, and [Formula: see text] collision at the Tevatron with [Formula: see text]. These include measurements of Wγ, Zγ, WW, WZ and ZZ production. The results are compared with Standard Model predictions, and are interpreted in terms of constraints on charged and neutral anomalous triple gauge couplings.

scholarly journals Higgs boson mass bounds in the Standard Model with type III and type I seesaw

2008 ◽  
Vol 668 (2) ◽  
pp. 121-125 ◽  
Author(s):  
Ilia Gogoladze ◽  
Nobuchika Okada ◽  
Qaisar Shafi
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Boson Mass ◽  
Type I ◽  
Higgs Boson Mass ◽  
Type Iii ◽  
The Standard Model

scholarly journals Remarks on an Anomalous Triple Gauge Boson Couplings

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Patricio Gaete ◽  
J. A. Helayël-Neto ◽  
L. P. R. Ospedal
Keyword(s):  
Gauge Boson ◽  
Wilson Loop ◽  
Higgs Mechanism ◽  
Linear Potential ◽  
Gauge Invariant ◽  
Physical Observable ◽  
The Standard Model ◽  
Electroweak Sector ◽  
Path Dependent ◽  
Gauge Boson Couplings

We address the effect of an anomalous triple gauge boson couplings on a physical observable for the electroweak sector of the Standard Model, when the S U 2 L ⊗ U 1 Y symmetry is spontaneously broken by the Higgs mechanism to U 1 e m . Our calculation is done within the framework of the gauge-invariant, but path-dependent variable formalism is an alternative to the Wilson loop approach. Our result shows that the interaction energy is the sum of a Yukawa and a linear potential, leading to the confinement of static probe charges. The point we wish to emphasize, however, is that the anomalous triple gauge boson couplings ( Z γ γ ) contributes to the confinement for distances on the intranuclear scale.

Upper Bound on the Higgs-Boson Mass in the Standard Model

1988 ◽  
Vol 61 (6) ◽  
pp. 678-681 ◽  
Author(s):  
Julius Kuti ◽  
Lee Lin ◽  
Yue Shen
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Upper Bound ◽  
Boson Mass ◽  
Higgs Boson Mass ◽  
The Standard Model
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