scholarly journals LIMIT ON THE COLOR-TRIPLET HIGGS MASS IN THE MINIMUM SUPERSYMMETRIC SU(5) MODEL

1995 ◽  
Vol 10 (30) ◽  
pp. 2267-2278 ◽  
Author(s):  
J. HISANO ◽  
T. MOROI ◽  
K. TOBE ◽  
T. YANAGIDA
Keyword(s):  
Renormalization Group ◽  
Lower Limit ◽  
Top Quark ◽  
Quark Mass ◽  
Higgs Mass ◽  
Group Analysis ◽  
Proton Decay ◽  
Top Quark Mass ◽  
Renormalization Group Analysis ◽  
Upper Limit

In the minimum supersymmetric SU(5) GUT, we derive the upper limit on the mass of the color-triplet Higgs multiplets as [Formula: see text] (90% C.L.) taking all possible corrections into account in a renormalization group analysis. If the above upper limit is compared with a lower limit on [Formula: see text] from the negative search for the proton decay; [Formula: see text] (in which effects of the larger top-quark mass are included), the minimum supersymmetric SU(5) GUT is severely constrained.

RG-IMPROVED BOUNDS ON HIGGS BOSON AND TOP QUARK MASSES FROM ELECTROWEAK BARYOGENESIS

1994 ◽  
Vol 09 (05) ◽  
pp. 459-464 ◽  
Author(s):  
A.S. MAJUMDAR ◽  
S.K. SETHI ◽  
S. MAHAJAN ◽  
A. MUKHERJEE ◽  
N. PANCHAPAKESAN ◽  
...  
Keyword(s):  
Renormalization Group ◽  
Higgs Boson ◽  
Top Quark ◽  
Quark Mass ◽  
Higgs Mass ◽  
Higgs Doublet ◽  
Baryon Asymmetry ◽  
Top Quark Mass ◽  
Quark Masses ◽  
Doublet Model

Electroweak baryogenesis in a single Higgs doublet model is considered. A renormalization group-improved effective potential is used. The requirement that the created baryon asymmetry is not washed out leads to bounds on the Higgs mass which vary significantly with the top quark mass.

$B^0 - \bar B^0 $ MIXING IN A SUPERSYMMETRY-INSPIRED TWO HIGGS DOUBLET MODEL

1988 ◽  
Vol 03 (11) ◽  
pp. 1099-1105 ◽  
Author(s):  
AMITAVA RAYCHAUDHURI ◽  
SREERUP RAYCHAUDHURI
Keyword(s):  
Top Quark ◽  
Quark Mass ◽  
Higgs Mass ◽  
Vacuum Expectation ◽  
Higgs Doublet ◽  
Top Quark Mass ◽  
Expectation Values ◽  
Charged Higgs ◽  
Doublet Model ◽  
Two Higgs Doublet Model

A supersymmetry-motivated two Higgs doublet model with equal vacuum expectation values for the two neutral Higgs and with a physical charged Higgs mass of 80–100 GeV is carefully examined in the context of its implications for [Formula: see text] mixing. Even with this conservative choice of Higgs parameters, the lower bound on the top quark mass coming from the ARGUS data is found to be considerably relaxed. An upper bound is also set, using results from CLEO and Mark II.

scholarly journals Towards a Higgs mass determination in asymptotically safe gravity with a dark portal

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
Astrid Eichhorn ◽  
Martin Pauly ◽  
Shouryya Ray
Keyword(s):  
Standard Model ◽  
Top Quark ◽  
Quark Mass ◽  
Higgs Mass ◽  
Beyond The Standard Model ◽  
Top Quark Mass ◽  
Dark Sector ◽  
Central Value ◽  
The Standard Model ◽  
Higgs Portal

Abstract There are indications that an asymptotically safe UV completion of the Standard Model with gravity could constrain the Higgs self-coupling, resulting in a prediction of the Higgs mass close to the vacuum stability bound in the Standard Model. The predicted value depends on the top quark mass and comes out somewhat higher than the experimental value if the current central value for the top quark mass is assumed. Beyond the Standard Model, the predicted value also depends on dark fields coupled through a Higgs portal. Here we study the Higgs self-coupling in a toy model of the Standard Model with quantum gravity that we extend by a dark scalar and fermion. Within the approximations used in [1], there is a single free parameter in the asymptotically safe dark sector, as a function of which the predicted (toy model) Higgs mass can be lowered due to mixing effects if the dark sector undergoes spontaneous symmetry breaking.

UPPER LIMITS ON THE TOP QUARK MASS IN MODELS WITH NEW GAUGE BOSONS

1990 ◽  
Vol 05 (02) ◽  
pp. 115-123 ◽  
Author(s):  
THOMAS G. RIZZO
Keyword(s):  
Top Quark ◽  
Quark Mass ◽  
Top Quark Mass ◽  
Gauge Bosons ◽  
Gauge Sector ◽  
Upper Limit ◽  
Upper Limits ◽  
The Standard Model ◽  
Lower Limits ◽  
Rule Out

The experimental value of the ρ parameter is used to obtain an upper limit on the top-quark mass (mt) in models with extended gauge sectors. This limit is found to be generally stronger than that obtained from similar considerations in the Standard Model (SM). This bound, however, is shown to depend strongly on the particular extension of the usual SM gauge sector under consideration. Improved experimental lower limits on mt can also be used to rule out large regions of the parameter space of extended electroweak models.

ON THE W BOSON ANOMALOUS MAGNETIC MOMENT

1990 ◽  
Vol 05 (14) ◽  
pp. 1119-1123
Author(s):  
KENNETH B. SAMUEL ◽  
MARK A. SAMUEL ◽  
G. LI
Keyword(s):  
Magnetic Moment ◽  
Top Quark ◽  
Anomalous Magnetic Moment ◽  
Quark Mass ◽  
Higgs Mass ◽  
W Boson ◽  
Top Quark Mass

The anomalous magnetic moment of the W boson is computed as a function of the unknown Higgs mass (MH) and the unknown top quark mass (mt). The results for (g − 2)w are as follows [Formula: see text]

scholarly journals HIGGS MASS IN THE STANDARD MODEL FROM COUPLING CONSTANT REDUCTION

2002 ◽  
Vol 17 (03) ◽  
pp. 335-346 ◽  
Author(s):  
B. ANANTHANARAYAN ◽  
J. PASUPATHY
Keyword(s):  
Renormalization Group ◽  
Standard Model ◽  
Top Quark ◽  
Higgs Mass ◽  
Gauge Coupling ◽  
Renormalization Scale ◽  
Coupling Constant ◽  
Top Quark Mass ◽  
The Standard Model ◽  
The One

Plausible interrelations between parameters of the standard model are studied. The empirical value of the top quark mass, when used in the renormalization group equations, suggests that the ratio of the color SU(3) gauge coupling g3, and the top coupling gt is independent of the renormalization scale. On the other hand, the variety of top-condensate models suggests that the Higgs self-coupling λ is proportional to [Formula: see text]. Invoking the requirement that the ratio [Formula: see text] is independent of the renormalization scale t, fixes the Higgs mass. The pole mass of the Higgs (which differs from the renormalization group mass by a few percent) is found to be ~ 154 GeV for the one-loop equations and ~ 148 GeV for the two-loop equations.

scholarly journals QCD CORRECTIONS TO THE $H^ + \to t\bar b$ DECAY WITHIN THE MINIMAL SUPERSYMMETRIC STANDARD MODEL

1995 ◽  
Vol 10 (15n16) ◽  
pp. 1113-1118 ◽  
Author(s):  
HEINZ KÖNIG
Keyword(s):  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Top Quark ◽  
Quark Mass ◽  
Higgs Mass ◽  
Top Quarks ◽  
Top Quark Mass ◽  
Charged Higgs ◽  
Left And Right

The results of the QCD corrections to the [Formula: see text] decay within the minimal super-symmetric standard model such that gluinos and scalar quarks are taken within the relevant loop diagram are presented. The mixing of the scalar partners of the left- and right-handed top quarks which is proportional to the top quark mass is included. The standard corrections via gluons and quarks are about +7% for a charged Higgs mass of 300 GeV and about −10% for a Higgs mass of 800 GeV. The standard corrections can be shown to diminish or enhance by a non-negligible amount of certain values of the supersymmetric parameter space. The sign changes can also be obtained.

STABILITY OF THE TOP QUARK MASS IN SUPERSYMMETRIC TOP CONDENSATE MODELS

1991 ◽  
Vol 06 (35) ◽  
pp. 3225-3237 ◽  
Author(s):  
T. E. CLARK ◽  
S. T. LOVE ◽  
W. T. A. TER VELDHUIS
Keyword(s):  
Fixed Point ◽  
Renormalization Group ◽  
Yukawa Coupling ◽  
Top Quark ◽  
Quark Mass ◽  
Coupling Constant ◽  
Top Quark Mass ◽  
Higher Dimensional

The top quark mass prediction in supersymmetric top condensate models is found to be insensitive to the inclusion of the effects of higher dimensional operators. For associated coefficients of characteristically moderate strength, the supersymmetric renormalization group trajectories are strongly focused to the infrared quasi-fixed point of the top Yukawa coupling constant.

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