scholarly journals Complete Higgs mass dependence of top quark pair threshold production to order

2006 ◽  
Vol 757 (1-2) ◽  
pp. 197-210 ◽  
Author(s):  
D. Eiras ◽  
M. Steinhauser
Keyword(s):  
Top Quark ◽  
Higgs Mass ◽  
Mass Dependence

scholarly journals RENORMALIZATION GROUP IMPROVED RADIATIVE CORRECTIONS TO THE SUPERSYMMETRIC HIGGS BOSON MASSES

1995 ◽  
Vol 10 (40) ◽  
pp. 3129-3137 ◽  
Author(s):  
A.V. GLADYSHEV ◽  
D.I. KAZAKOV
Keyword(s):  
Renormalization Group ◽  
Higgs Boson ◽  
Effective Potential ◽  
Top Quark ◽  
Higgs Mass ◽  
Radiative Corrections ◽  
Mass Dependence ◽  
The One ◽  
Top Mass

The one-loop radiative corrections to the Higgs boson potential in the MSSM, originating from the top quark and squark loops, are summed in the leading log approximation using the renormalization group (RG). The RG improved effective potential is minimized and the corrections to the CP-odd and CP-even Higgs boson masses are calculated. The resulting masses exhibit smoother top mass dependence than those calculated without RG summation. We have also found that for preferable values of the top mass the light Higgs mass does not exceed 100 GeV.

scholarly journals ZH production in gluon fusion: two-loop amplitudes with full top quark mass dependence

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Long Chen ◽  
Gudrun Heinrich ◽  
Stephen P. Jones ◽  
Matthias Kerner ◽  
Jonas Klappert ◽  
...  
Keyword(s):  
Top Quark ◽  
Quark Mass ◽  
Gluon Fusion ◽  
Top Quarks ◽  
Mass Dependence ◽  
Finite Part ◽  
Top Quark Mass ◽  
Helicity Amplitudes ◽  
Quark Mass Dependence ◽  
Loop Amplitudes

Abstract We present results for the two-loop helicity amplitudes entering the NLO QCD corrections to the production of a Higgs boson in association with a Z -boson in gluon fusion. The two-loop integrals, involving massive top quarks, are calculated numerically. Results for the interference of the finite part of the two-loop amplitudes with the Born amplitude are shown as a function of the two kinematic invariants on which the amplitudes depend.

scholarly journals Full top quark mass dependence in Higgs boson pair production at NLO

2016 ◽  
Vol 2016 (10) ◽  
Author(s):  
S. Borowka ◽  
N. Greiner ◽  
G. Heinrich ◽  
S.P. Jones ◽  
M. Kerner ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Pair Production ◽  
Top Quark ◽  
Quark Mass ◽  
Mass Dependence ◽  
Top Quark Mass ◽  
Boson Pair ◽  
Boson Pair Production ◽  
Quark Mass Dependence

scholarly journals Erratum: Top quark mass dependence of the Higgs boson-gluon form factor at three loops [Phys. Rev. D 100 , 034017 (2019)]

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
Joshua Davies ◽  
Ramona Gröber ◽  
Andreas Maier ◽  
Thomas Rauh ◽  
Matthias Steinhauser
Keyword(s):  
Form Factor ◽  
Higgs Boson ◽  
Top Quark ◽  
Quark Mass ◽  
Mass Dependence ◽  
Top Quark Mass ◽  
Quark Mass Dependence

THE HIGGS PHENOMENON

1996 ◽  
Vol 11 (27) ◽  
pp. 4779-4783 ◽  
Author(s):  
RUDOLF RODENBERG
Keyword(s):  
Top Quark ◽  
Quantum Coherence ◽  
Higgs Mass ◽  
Scalar Fields ◽  
Scale Dependence ◽  
Multiple Point ◽  
Higgs Particle ◽  
Theoretical Methods ◽  
Low Energies ◽  
Nonlinear Realizations

We briefly discuss why we are forced to use the Higgs–Kibble mechanism just, for example, to be able to "present" masses and what in this sense the so-called Higgs phenomenon really means. But, independent of this fact that we cannot calculate physical masses, we, in spite of this reality, briefly demonstrate presently available theoretical methods for understanding the top-Higgs-mass correlations, for example, especially since the discovery of the top quark at FNAL. It is possible that model-dependent ways, using SUSY and SUGRA models, for example, to overcome the so-called scale dependence (just from the Planck down to the Fermi scale), nonlinear realizations of SUSY and also the requirement of phase coexistence of the two minima of the effective potential with one-loop corrections and its degeneracy ("multiple point criticality principle"), might indicate that in this sense the existence of supersymmetry can be "partially" ruled out. In this context the top-Higgs-mass spectrum belongs neither to the SM nor to SUSY. Also, the loss of quantum coherence, which is very small at low energies for everything except scalar fields, leads to the prediction that we may never observe the Higgs particle either.

scholarly journals CONSTRAINTS ON THE ELECTROWEAK UNIVERSAL PARAMETERS AND THE TOP AND HIGGS MASSES FROM UPDATED LEP/SLC DATA

1995 ◽  
Vol 10 (33) ◽  
pp. 2553-2569 ◽  
Author(s):  
SEIJI MATSUMOTO
Keyword(s):  
Form Factor ◽  
Higgs Boson ◽  
Top Quark ◽  
Higgs Mass ◽  
Global Analysis ◽  
Mean Value ◽  
The Standard Model ◽  
The Mean ◽  
The Masses ◽  
Vertex Form Factor

A global analysis is performed using the recent data from LEP and SLC. Constraints on the electroweak universal parameters (S, T, U) and on the masses of the top quark and Higgs boson within the standard model (SM) are investigated. The uncertainties due to the QCD and QED effective couplings, αs(mz) and , [Formula: see text] are examined in detail. Even though the mean value of S is increased to be consistent with zero, the naive Technicolor models are still disfavored due to its reduced error. Within the SM, we find the 90% CL constraints; 133 GeV<mt<190 GeV and 10 GeV<mH< 440 GeV for αs(mz)=0.116 and [Formula: see text]. The experimental constraints on the ZbLbL vertex form factor, [Formula: see text] play an important role in disfavoring the region of large mt(mt~200GeV) and large mH(mH~1000 GeV). If mt is precisely known, the present electroweak data give a rather strict upper bound on the Higgs mass, mH<140(300) GeV at 95% CL, for mt=160(175) GeV and for the above αs(mz) and [Formula: see text].

scholarly journals STUDYING STRUCTURE OF ELECTROWEAK CORRECTIONS

1995 ◽  
Vol 10 (26) ◽  
pp. 3803-3815 ◽  
Author(s):  
ZENRŌ HIOKI
Keyword(s):  
Top Quark ◽  
Confidence Level ◽  
Born Approximation ◽  
Higgs Mass ◽  
New Physics ◽  
The Other ◽  
Precision Measurements ◽  
Quantum Corrections ◽  
Electroweak Theory ◽  
Weak Boson

Several different effects in electroweak quantum corrections are explored separately through the latest data on the weak-boson masses. The leading-log approximation, the improved-Born approximation and the nondecoupling top-quark effects are studied without depending on the recent CDF data about mt, and the results are given in a form independent, of the Higgs mass. On the other hand, the bosonic and the nondecoupling Higgs effects are examined by fully taking account of those CDF data. It is emphasized that future precision measurements of MW and mt are considerably significant not only for further studies of the electroweak theory at higher confidence level but also for new-physics searches beyond it.

scholarly journals CONSTRAINTS ON THE CHARGED HIGGS BOSON OF THE TWO-HIGGS DOUBLET MODEL TYPE III

2011 ◽  
Vol 26 (25) ◽  
pp. 1869-1879 ◽  
Author(s):  
H. CARDENAS ◽  
J. DUARTE ◽  
J. ALEXIS RODRIGUEZ
Keyword(s):  
Higgs Boson ◽  
Top Quark ◽  
Higgs Mass ◽  
Higgs Doublet ◽  
Charged Higgs Boson ◽  
Top Quark Mass ◽  
Type Iii ◽  
Charged Higgs ◽  
Doublet Model ◽  
Two Higgs Doublet Model

The D0 experiment has reported a direct search for a charged Higgs boson produced by [Formula: see text] annihilation and decaying to [Formula: see text] final state, in the 180≤MH+≤300 GeV mass range. The analysis has led to upper limits on the production cross-section in the framework of the two-Higgs doublet model types I, II and III. We compare the predictions of two different scenarios in the framework of the two-Higgs doublet type III to the cross-section limits reported by D0 collaboration, and we obtain constraints on the charged Higgs mass, for the case when the charged Higgs mass is bigger than the top quark mass. Also, searches for the charged Higgs boson with a mass smaller than top quark mass are considered, we discuss the possible limits on the charged Higgs boson mass obtained from measurements of the ratio [Formula: see text] within the two-Higgs doublet model type III.

Top-quark mass dependence of the decayBs→γγin the standard electroweak model

1990 ◽  
Vol 42 (7) ◽  
pp. 2314-2323 ◽  
Author(s):  
Guey-Lin Lin ◽  
Jiang Liu ◽  
York-Peng Yao
Keyword(s):  
Top Quark ◽  
Quark Mass ◽  
Mass Dependence ◽  
Top Quark Mass ◽  
Quark Mass Dependence ◽  
Electroweak Model

CLEAN PRECISION TESTS OF THE ELECTROWEAK THEORY

1992 ◽  
Vol 07 (12) ◽  
pp. 1009-1021 ◽  
Author(s):  
ZENRŌ HIOKI
Keyword(s):  
Experimental Data ◽  
Top Quark ◽  
Higgs Mass ◽  
Quantum Correction ◽  
Electroweak Theory ◽  
Weak Boson ◽  
Yukawa Couplings ◽  
Symmetry Breakdown ◽  
Electroweak Precision ◽  
Spontaneous Symmetry Breakdown

Present status of electroweak precision tests via the weak boson masses is reviewed, emphasizing that the standard SU(2) × U(1) theory is phenomenologically very successful also at quantum correction level. In particular, it is shown that the latest experimental data indicate the existence not only of the whole one-loop corrections but also of the non-decoupling top-quark effects, independent of the Higgs mass, which are a characteristic feature of theories with masses generated by spontaneous symmetry breakdown plus large Yukawa couplings.

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