scholarly journals Impact of an extra gauge interaction on naturalness of supersymmetry

2018 ◽  
Vol 2018 (8) ◽  
Author(s):  
Marcin Badziak ◽  
Keisuke Harigaya
Keyword(s):  
Gauge Interaction

scholarly journals THE MASS DIFFERENCE OF $F-\bar{F}$ WITH SO(3) FAMILY GAUGE SYMMETRY

2012 ◽  
Vol 27 (20) ◽  
pp. 1250107 ◽  
Author(s):  
HONG-LEI LI ◽  
SHOU-SHAN BAO ◽  
ZONG-GUO SI
Keyword(s):  
Gauge Symmetry ◽  
Mass Difference ◽  
Simple Extension ◽  
Gauge Bosons ◽  
Majorana Neutrinos ◽  
Mixing Matrix ◽  
Gauge Interaction

As a simple extension, a non-Abelian family gauge symmetry SO(3), as well as three family Majorana neutrinos, was introduced to explain the tri-bimaximal mixing matrix of neutrinos. We discuss the effect of the possible SO(3) family gauge interaction to the mass differences of [Formula: see text] and [Formula: see text], and get the constrains to the new gauge bosons.

scholarly journals Right-handed neutrino dark matter under the B − L gauge interaction

2017 ◽  
Vol 2017 (2) ◽  
Author(s):  
Kunio Kaneta ◽  
Zhaofeng Kang ◽  
Hye-Sung Lee
Keyword(s):  
Dark Matter ◽  
Gauge Interaction

THE CHIRAL LAGRANGIAN APPROACH TO THE NON-UNIVERSAL EFFECTS IN THE $Z b \bar b$ VERTEX

1994 ◽  
Vol 09 (21) ◽  
pp. 1955-1961 ◽  
Author(s):  
X. ZHANG
Keyword(s):  
Top Quark ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Coset Space ◽  
Dynamical Models ◽  
Quark Loop ◽  
Mass Generation ◽  
Effective Lagrangian ◽  
Gauge Interaction ◽  
Chiral Lagrangian

We calculate the top quark loop corrections to the [Formula: see text] vertex in the chiral Lagrangian of the dynamical electroweak symmetry breaking theory. We use the effective Lagrangian based on coset space SU(2)×U(1)/U(1) with the electroweak gauge interaction switched off, so these corrections are directly related to the physics associated with the heavy top quark and the mass generation in the dynamical models.

WHY IS TOP HEAVIER THAN BOTTOM? YUKAWA AND MASS UNIFICATION IN SUSY MODEL

1992 ◽  
Vol 07 (36) ◽  
pp. 3379-3390 ◽  
Author(s):  
MASAKO BANDO ◽  
TAICHIRO KUGO ◽  
NOBUHIRO MAEKAWA ◽  
HIROAKI NAKANO
Keyword(s):  
Lower Bound ◽  
Top Quark ◽  
Susy Breaking ◽  
Third Generation ◽  
Parameter Choice ◽  
Yukawa Couplings ◽  
The Third ◽  
Mass Pattern ◽  
Gauge Interaction ◽  
Breaking Scale

We examine whether the unification constraints on the Yukawa couplings and on the Higgs masses in the minimal supersymmetric Standard Model can be consistent with the observed mass pattern of the third generation fermions. The effects of the QCD interaction and the SU(2)R breaking owing to the U(1) Y gauge interaction and the absence of ντR are crucial. We observe that the parameter choice of “no-scale” supergravity is favored and the SUSY breaking scale has a lower bound, in order for the top quark to be much heavier than the bottom quark.

scholarly journals B-anomalies from flavorful U(1)$$'$$ extensions, safely

2022 ◽  
Vol 82 (1) ◽  
Author(s):  
Rigo Bause ◽  
Gudrun Hiller ◽  
Tim Höhne ◽  
Daniel F. Litim ◽  
Tom Steudtner
Keyword(s):  
Standard Model ◽  
Predictive Power ◽  
Planck Scale ◽  
Low Energy ◽  
Energy Parameters ◽  
Left Handed ◽  
The Standard Model ◽  
Scalar Sector ◽  
Gauge Interaction ◽  
Gauge Anomaly

Abstract$$U(1)^\prime $$ U ( 1 ) ′ extensions of the standard model with generation-dependent couplings to quarks and leptons are investigated as an explanation of anomalies in rare B-decays, with an emphasis on stability and predictivity up to the Planck scale. To these ends, we introduce three generations of vector-like standard model singlet fermions, an enlarged, flavorful scalar sector, and, possibly, right-handed neutrinos, all suitably charged under the $$U(1)^\prime $$ U ( 1 ) ′ gauge interaction. We identify several gauge-anomaly free benchmarks consistent with $$B_s$$ B s -mixing constraints, with hints for electron-muon universality violation, and the global $$b \rightarrow s$$ b → s fit. We further investigate the complete two-loop running of gauge, Yukawa and quartic couplings up to the Planck scale to constrain low-energy parameters and enhance the predictive power. A characteristic of models is that the $$Z^\prime $$ Z ′ with TeV-ish mass predominantly decays to invisibles, i.e. new fermions or neutrinos. $$Z^\prime $$ Z ′ -production can be studied at a future muon collider. While benchmarks feature predominantly left-handed couplings $$C_9^{\mu }$$ C 9 μ and $$C_{10}^{\mu }$$ C 10 μ , right-handed ones can be accommodated as well.

scholarly journals IS DARK ENERGY ABNORMALLY WEIGHTING?

2007 ◽  
Vol 16 (12b) ◽  
pp. 2587-2592 ◽  
Author(s):  
JEAN-MICHEL ALIMI ◽  
ANDRÉ FÜZFA
Keyword(s):  
General Relativity ◽  
Dark Energy ◽  
Time Variation ◽  
Gravitational Constant ◽  
Cosmic Acceleration ◽  
Hubble Diagram ◽  
Ordinary Matter ◽  
Gauge Interaction

We investigate the possibility that dark energy does not couple to gravitation in the same way as ordinary matter, yielding a violation of the weak and strong equivalence principles on cosmological scales. We build a transient mechanism in which gravitation is pushed away from general relativity (GR) by a Born–Infeld (BI) gauge interaction acting as an "abnormally weighting (dark) energy" (AWE). This mechanism accounts for the Hubble diagram of far-away supernovae by cosmic acceleration and time variation of the gravitational constant while accounting naturally for the present tests on GR.

PHASE STRUCTURE OF QCD-LIKE GAUGE THEORIES PLUS FOUR-FERMION INTERACTIONS

1991 ◽  
Vol 06 (37) ◽  
pp. 3385-3396 ◽  
Author(s):  
KEI-ICHI KONDO ◽  
SUSUMU SHUTO ◽  
KOICHI YAMAWAKI
Keyword(s):  
Fixed Point ◽  
Phase Structure ◽  
Gauge Theories ◽  
Anomalous Dimension ◽  
Gauge Coupling ◽  
Continuum Theory ◽  
Dyson Equation ◽  
The Other ◽  
Logarithmic Corrections ◽  
Gauge Interaction

We investigate the phase structure of (QCD-like) gauged Nambu-Jona-Lasinio model (QCD-like gauge theories plus four-fermion interactions) based on the ladder Schwinger-Dyson equation with one-loop running gauge coupling. Through analytical and numerial studies, we establish two-fixed points structure, one with a large anomalous dimension γm ≃ 2 and the other with a small one γm ≃ 0. We further obtain the power critical exponents through the equation of state, which, as they stand, imply that the former fixed point is a Gaussian fixed point. We emphasize that logarithmic corrections due to the gauge interaction is crucial to obtaining an interacting continuum theory at this fixed point.

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