Top quark polarization and -odd spin correlations as tools for testing (non) standard model predictions

1992 ◽  
Vol 297 (3-4) ◽  
pp. 318-326 ◽  
Author(s):  
W. Bernreuther ◽  
J.P. Ma ◽  
T. Schröder
Keyword(s):  
Standard Model ◽  
Top Quark ◽  
Spin Correlations ◽  
Model Predictions

scholarly journals Collider-independent top quark forward-backward asymmetries: Standard model predictions

2012 ◽  
Vol 86 (11) ◽  
Author(s):  
J. A. Aguilar-Saavedra ◽  
W. Bernreuther ◽  
Z.-G. Si
Keyword(s):  
Standard Model ◽  
Top Quark ◽  
Model Predictions

Electroweak tests using leptonic decays of the Z°

1991 ◽  
Vol 336 (1642) ◽  
pp. 271-279 ◽  
Keyword(s):  
Standard Model ◽  
Cross Sections ◽  
Differential Cross ◽  
Top Quark ◽  
Polar Angle ◽  
Differential Cross Sections ◽  
Leptonic Decays ◽  
The Standard Model ◽  
Model Predictions

LEP results characterizing the reactions e + e - → Z° → e + e - , μ + μ - , τ + τ - are presented. Measurements of the partial widths for these reactions, and of their differential cross sections as a function of polar angle permit a determination of electroweak parameters. Comparisons between these measured electroweak parameters and the Standard Model predictions are a precise test of the Standard Model. Alternatively, it can be assumed that the Standard Model is correct, in which case the data can be used to infer a mass for the top quark.

scholarly journals Indirect $$ \mathcal{CP} $$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Henning Bahl ◽  
Philip Bechtle ◽  
Sven Heinemeyer ◽  
Judith Katzy ◽  
Tobias Klingl ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Top Quark ◽  
Decay Channel ◽  
New Physics ◽  
Current Data ◽  
Quark Interaction ◽  
The Standard Model ◽  
Vector Bosons ◽  
Selection Of

Abstract The $$ \mathcal{CP} $$ CP structure of the Higgs boson in its coupling to the particles of the Standard Model is amongst the most important Higgs boson properties which have not yet been constrained with high precision. In this study, all relevant inclusive and differential Higgs boson measurements from the ATLAS and CMS experiments are used to constrain the $$ \mathcal{CP} $$ CP -nature of the top-Yukawa interaction. The model dependence of the constraints is studied by successively allowing for new physics contributions to the couplings of the Higgs boson to massive vector bosons, to photons, and to gluons. In the most general case, we find that the current data still permits a significant $$ \mathcal{CP} $$ CP -odd component in the top-Yukawa coupling. Furthermore, we explore the prospects to further constrain the $$ \mathcal{CP} $$ CP properties of this coupling with future LHC data by determining tH production rates independently from possible accompanying variations of the $$ t\overline{t}H $$ t t ¯ H rate. This is achieved via a careful selection of discriminating observables. At the HL-LHC, we find that evidence for tH production at the Standard Model rate can be achieved in the Higgs to diphoton decay channel alone.

scholarly journals Mass Reconstruction of MSSM Higgs Boson

2019 ◽  
Vol 64 (8) ◽  
pp. 714
Author(s):  
T. V. Obikhod ◽  
I. A. Petrenko
Keyword(s):  
Experimental Data ◽  
Higgs Boson ◽  
Standard Model ◽  
Top Quark ◽  
Computer Programs ◽  
Higgs Bosons ◽  
Associated Production ◽  
The Standard Model ◽  
The Masses ◽  
Mass Reconstruction

The problems of the Standard Model, as well as questions related to Higgs boson properties led to the need to model the ttH associated production and the Higgs boson decay to a top quark pair within the MSSM model. With the help of computer programs MadGraph, Pythia, and Delphes and using the latest kinematic cuts taken from experimental data obtained at the LHC, we have predicted the masses of MSSM Higgs bosons, A and H.

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 REMARKS ON THE VALUE OF THE HIGGS MASS FROM THE PRESENT LEP DATA

1995 ◽  
Vol 10 (10) ◽  
pp. 845-852 ◽  
Author(s):  
M. CONSOLI ◽  
Z. HIOKI
Keyword(s):  
Standard Model ◽  
Higgs Mass ◽  
Detailed Comparison ◽  
The Other ◽  
Firm Conclusion ◽  
Other Hand ◽  
Model Predictions ◽  
The One

We perform a detailed comparison of the present LEP data with the one-loop standard model predictions. It is pointed out that for mt = 174 GeV the "bulk" of the data prefers a rather large value of the Higgs mass in the range of 500–1000 GeV, in agreement with the indications from the W mass. On the other hand, to accommodate a light Higgs it is crucial to include the more problematic data for the τ FB asymmetry. We discuss further improvements on the data which are required to obtain a firm conclusion.

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