scholarly journals Composite Dark Matter and a horizontal symmetry

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Alexandre Carvunis ◽  
Diego Guadagnoli ◽  
Méril Reboud ◽  
Peter Stangl
Keyword(s):  
Dark Matter ◽  
Gauge Symmetry ◽  
Standard Model ◽  
Mass Scale ◽  
Flavor Symmetry ◽  
Gauge Bosons ◽  
Weakly Coupled ◽  
Horizontal Symmetry ◽  
The Standard Model ◽  
The One

Abstract We present a model of composite Dark Matter (DM), in which a new QCD-like confining “hypercolor” sector generates naturally stable hyperbaryons as DM candidates and at the same time provides mass to new weakly coupled gauge bosons H that serve as DM mediators, coupling the hyperbaryons to the Standard Model (SM) fermions. By an appropriate choice of the H gauge symmetry as a horizontal SU(2)h SM flavor symmetry, we show how the H gauge bosons can be identified with the horizontal gauge bosons recently put forward as an explanation for discrepancies in rare B-meson decays. We find that the mass scale of the H gauge bosons suggested by the DM phenomenology intriguingly agrees with the one needed to explain the rare B-decay discrepancies.

ORIENTIFOLD STRING VACUA AND STRINGS AT THE LHC

2011 ◽  
Vol 26 (27n28) ◽  
pp. 4687-4701
Author(s):  
DIETER LÜST
Keyword(s):  
Large Hadron Collider ◽  
Standard Model ◽  
Hadron Collider ◽  
Mass Scale ◽  
Gauge Bosons ◽  
Model Based ◽  
Open Strings ◽  
Fundamental String ◽  
Weakly Coupled ◽  
The Standard Model

We consider extensions of the Standard Model based on open strings ending on D-branes, with gauge bosons due to strings attached to stacks of D-branes and chiral matter due to strings stretching between intersecting D-branes. Assuming that the fundamental string mass scale is in the TeV range and the theory is weakly coupled, we discuss possible signals of string physics at the Large Hadron Collider (LHC).

scholarly journals STRING PHENOMENOLOGY AT THE LHC

2009 ◽  
Vol 24 (31) ◽  
pp. 2481-2490 ◽  
Author(s):  
LUIS A. ANCHORDOQUI ◽  
HAIM GOLDBERG ◽  
DIETER LÜST ◽  
STEPHAN STIEBERGER ◽  
TOMASZ R. TAYLOR
Keyword(s):  
Large Hadron Collider ◽  
Standard Model ◽  
Hadron Collider ◽  
Mass Scale ◽  
Gauge Bosons ◽  
String Phenomenology ◽  
Open Strings ◽  
Fundamental String ◽  
Weakly Coupled ◽  
The Standard Model

We consider extensions of the standard model based on open strings ending on D-branes, with gauge bosons due to strings attached to stacks of D-branes and chiral matter due to strings stretching between intersecting D-branes. Assuming that the fundamental string mass scale is in the TeV range and the theory is weakly coupled, we review possible signals of string physics at the Large Hadron Collider.

scholarly journals ELECTROWEAK UNIFICATION OF QUARKS AND LEPTONS IN A GAUGE GROUP SUC(3) × SU(4) × UX(1)

2012 ◽  
Vol 27 (21) ◽  
pp. 1250117 ◽  
Author(s):  
FAYYAZUDDIN
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Gauge Group ◽  
Lower Limit ◽  
Z Boson ◽  
Early Stage ◽  
Mass Scale ◽  
The Standard Model ◽  
Vector Bosons ◽  
The Universe

A model for electroweak unification of quarks and leptons, in a gauge group SUC(3) × SU(4) × UX(1) is constructed. The model requires, three generations of quarks and leptons which are replicas (mirror) of the standard quarks and leptons. The gauge group SU(4) × UX(1) is broken in such a way so as to reproduce standard model and to generate heavy masses for the vector bosons [Formula: see text], the leptoquarks and mirror fermions. It is shown lower limit on mass scale of mirror fermions is [Formula: see text], E- being the lightest mirror fermion coupled to Z boson. As the universe expands, the heavy matter is decoupled at an early stage of expansion and may be a source of dark matter. Leptoquarks in the model connect the standard model and mirror fermions. Baryon genesis in our universe implies antibaryon genesis in mirror universe.

scholarly journals A chiral model for sterile neutrino

2021 ◽  
Vol 2021 (12) ◽  
Author(s):  
Chun Liu ◽  
Yakefu Reyimuaji
Keyword(s):  
Dark Matter ◽  
Gauge Symmetry ◽  
Standard Model ◽  
Sterile Neutrino ◽  
Chiral Model ◽  
Dark Matter Candidate ◽  
Natural Explanation ◽  
The Standard Model

Abstract A model, which extends the standard model with a new chiral U(1)′ gauge symmetry sector, for the eV-mass sterile neutrino is constructed. It is basically fixed by anomaly free conditions. The lightness of the sterile neutrino has a natural explanation. As a by product, this model provides a WIMP-like dark matter candidate.

scholarly journals ELECTROWEAKSU(4)L⊗U(1)YMODELS WITHOUT EXOTIC ELECTRIC CHARGES

2009 ◽  
Vol 24 (25n26) ◽  
pp. 4923-4938 ◽  
Author(s):  
ADRIAN PALCU
Keyword(s):  
Mass Spectrum ◽  
Standard Model ◽  
Mass Scale ◽  
Boson Mass ◽  
Gauge Models ◽  
The Standard Model ◽  
The One

For the particular class of SU (4)L⊗ U (1)Yelectroweak models without exotic electric charges, some plausible phenomenological predictions — such as the boson mass spectrum and charges of all the fermions involved therein — are made by using the algebraical approach of the exactly solving method for gauge models with high symmetries. Along with the one-parameter resulting mass scale (to be confirmed at TeV scale in LHC) our approach predicts the exact expressions of the charges (both electric and neutral) in the fermion sector, while all the Standard Model phenomenology is naturally recovered.

scholarly journals Extension of the standard model of electroweak interaction and Dark Matter in the tangent bundle geometry

2019 ◽  
Vol 79 (9) ◽  
Author(s):  
Joachim Herrmann
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Tangent Bundle ◽  
Electroweak Interaction ◽  
Fiber Axis ◽  
Beyond The Standard Model ◽  
Gauge Bosons ◽  
Quantum Numbers ◽  
The Standard Model ◽  
Vector Gauge

Abstract A generalized theory of electroweak interaction is developed based on the underlying geometrical structure of the tangent bundle with symmetries arising from transformations of tangent vectors along the fiber axis at a fixed spacetime point given by the SO(3,1) group. Electroweak interaction beyond the standard model (SM) is described by the little groups $$ SU(2)\otimes E^{c}(2)$$SU(2)⊗Ec(2) ($$E^{c}(2)$$Ec(2) is the central extended Euclidian group) which includes the group $$SU(2)\otimes U(1)$$SU(2)⊗U(1) as a limit case. In addition to isospin and hypercharge, two additional quantum numbers arise which explain the existence of families in the SM. The connection coefficients yield the SM gauge potentials but also hypothetical gauge bosons and other hypothetical particles as a Higgs family as well as candidate Dark Matter particles are predicted. Several important consequences for the interaction between dark fermions, dark scalars or dark vector gauge bosons with each other and with SM Higgs and Z-bosons are described.

scholarly journals GAUGE THEORY AND MORE — ANOTHER SOLUTION FOR THE DARK MATTER

2009 ◽  
Vol 24 (18n19) ◽  
pp. 3366-3371 ◽  
Author(s):  
W-Y. PAUCHY HWANG
Keyword(s):  
Dark Matter ◽  
Gauge Theory ◽  
Standard Model ◽  
Higgs Mechanism ◽  
Gauge Bosons ◽  
Basic Family ◽  
Visible Matter ◽  
The Family ◽  
The Standard Model ◽  
The Masses

These days we learn that, in our Universe, the dark matter occupies about 25% of the content, compared to only 5% of the "visible" ordinary matter. We propose that the description of the dark matter would be an extension of the Standard Model - a gauge theory. We all know that in the Standard Model we have three generations but still don't know why - the so-called "family problem". On other hand, in view of the masses and oscillations, the neutrinos now present some basic difficulty in the Standard Model. In this note, I propose that on top of the SUc(3)×, SU(2) × U(1) standard model there is an SUf(3) extension - a simple SUc(3) × SU(2) × U(1) × SUf(3) extended standard model. The family gauge bosons (familons) are massive through the so-called "colored" Higgs mechanism while the remaining Higgs particles are also massive. The three neutrinos, the electron-like, muon-like, and tao-like neutrinos, form the basic family triplets. Hopefully all the couplings to the "visible" matter are through the neutrinos, explaining why the dark matter is more than the visible matter in our Universe.

scholarly journals Dark matter and baryogenesis from non-Abelian gauged lepton number

2017 ◽  
Vol 32 (19) ◽  
pp. 1730018 ◽  
Author(s):  
Bartosz Fornal
Keyword(s):  
Dark Matter ◽  
Gauge Symmetry ◽  
Simple Model ◽  
Standard Model ◽  
Gauge Group ◽  
Lepton Number ◽  
Dark Matter Candidate ◽  
The Standard Model ◽  
The Right ◽  
Standard Model Gauge Group

A simple model is constructed based on the gauge symmetry [Formula: see text], with only the leptons transforming nontrivially under [Formula: see text]. The extended symmetry is broken down to the Standard Model gauge group at TeV-scale energies. We show that this model provides a mechanism for baryogenesis via leptogenesis in which the lepton number asymmetry is generated by [Formula: see text] instantons. The theory also contains a dark matter candidate — the [Formula: see text] partner of the right-handed neutrino.

scholarly journals SMART U(1)$$_X$$: standard model with axion, right handed neutrinos, two Higgs doublets and U(1)$$_X$$ gauge symmetry

2020 ◽  
Vol 80 (11) ◽  
Author(s):  
Nobuchika Okada ◽  
Digesh Raut ◽  
Qaisar Shafi
Keyword(s):  
Dark Matter ◽  
Gauge Symmetry ◽  
Domain Wall ◽  
Standard Model ◽  
Particle Physics ◽  
Inflection Point ◽  
Baryon Asymmetry ◽  
Grand Unification ◽  
The Standard Model ◽  
The Universe

AbstractTo address five fundamental shortcomings of the Standard Model (SM) of particle physics and cosmology, we propose a phenomenologically viable framework based on a $$U(1)_X \times U(1)_{PQ}$$ U ( 1 ) X × U ( 1 ) PQ extension of the SM, that we call “SMART U(1)$$_X$$ X ”. The $$U(1)_X$$ U ( 1 ) X gauge symmetry is a well-known generalization of the $$U(1)_{B-L}$$ U ( 1 ) B - L symmetry and $$U(1)_{PQ}$$ U ( 1 ) PQ is the global Peccei–Quinn (PQ) symmetry. Three right handed neutrinos are added to cancel $$U(1)_X$$ U ( 1 ) X related anomalies, and they play a crucial role in understanding the observed neutrino oscillations and explaining the observed baryon asymmetry in the universe via leptogenesis. Implementation of PQ symmetry helps resolve the strong CP problem and also provides axion as a compelling dark matter (DM) candidate. The $$U(1)_X$$ U ( 1 ) X gauge symmetry enables us to implement the inflection-point inflation scenario with $$H_{inf} \lesssim 2 \times 10^{7}$$ H inf ≲ 2 × 10 7  GeV, where $$H_{inf}$$ H inf is the value of Hubble parameter during inflation. This is crucial to overcome a potential axion domain wall problem as well as the axion isocurvature problem. The SMART U(1)$$_X$$ X framework can be successfully implemented in the presence of SU(5) grand unification, as we briefly show.

scholarly journals ρ PARAMETER IN THE VECTOR CONDENSATE MODEL OF ELECTROWEAK INTERACTIONS

1994 ◽  
Vol 09 (18) ◽  
pp. 1701-1705 ◽  
Author(s):  
G. CYNOLTER ◽  
E. LENDVAI ◽  
G. POCSIK
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Vector Boson ◽  
Higgs Doublet ◽  
Electroweak Interactions ◽  
Gauge Bosons ◽  
Momentum Scale ◽  
The Standard Model ◽  
Vector Bosons

In the standard model of electroweak interactions the Higgs doublet is replaced by a doublet of vector bosons and the gauge symmetry is broken dynamically. This generates masses for the gauge bosons and fermions as well as it fixes the interactions in the model. The model has a low momentum scale. In this note we show that the model survives the test of the ρ parameter, and to each momentum scale ρ chooses a possible range of vector boson masses.

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