scholarly journals Abelian gauge extension of the standard model: Dark matter and radiative neutrino mass

2012 ◽  
Vol 85 (9) ◽  
Author(s):  
Debasish Borah ◽  
Rathin Adhikari
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Neutrino Mass ◽  
Abelian Gauge ◽  
The Standard Model

scholarly journals SUPERSYMMETRIC U(1) GAUGE REALIZATION OF THE DARK SCALAR DOUBLET MODEL OF RADIATIVE NEUTRINO MASS

2008 ◽  
Vol 23 (10) ◽  
pp. 721-725 ◽  
Author(s):  
ERNEST MA
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Neutrino Mass ◽  
Dark Matter Candidate ◽  
Neutrino Masses ◽  
Particle Interactions ◽  
The Standard Model ◽  
Doublet Model

Adding a second scalar doublet (η+, η0) and three neutral singlet fermions N1, 2, 3 to the Standard Model of particle interactions with a new Z2 symmetry, it has been shown that [Formula: see text] or [Formula: see text] is a good dark-matter candidate and seesaw neutrino masses are generated radiatively. A supersymmetric U(1) gauge extension of this new idea is proposed, which enforces the usual R-parity of the Minimal Supersymmetric Standard Model, and allows this new Z2 symmetry to emerge as a discrete remnant.

scholarly journals Anomalous leptonic U(1) symmetry: Syndetic origin of the QCD axion, weak-scale dark matter, and radiative neutrino mass

2018 ◽  
Vol 33 (03) ◽  
pp. 1850024 ◽  
Author(s):  
Ernest Ma ◽  
Diego Restrepo ◽  
Óscar Zapata
Keyword(s):  
Dark Matter ◽  
Large Hadron Collider ◽  
Standard Model ◽  
Neutrino Mass ◽  
Hadron Collider ◽  
Neutrino Masses ◽  
Weak Scale ◽  
The Standard Model

The well-known leptonic U(1) symmetry of the Standard Model (SM) of quarks and leptons is extended to include a number of new fermions and scalars. The resulting theory has an invisible QCD axion (thereby solving the strong CP problem), a candidate for weak-scale dark matter (DM), as well as radiative neutrino masses. A possible key connection is a color-triplet scalar, which may be produced and detected at the Large Hadron Collider.

scholarly journals Gauge B–L model of radiative neutrino mass with multipartite dark matter

2016 ◽  
Vol 31 (27) ◽  
pp. 1650163 ◽  
Author(s):  
Ernest Ma ◽  
Nicholas Pollard ◽  
Oleg Popov ◽  
Mohammadreza Zakeri
Keyword(s):  
Dark Matter ◽  
Large Hadron Collider ◽  
Standard Model ◽  
Neutrino Mass ◽  
Hadron Collider ◽  
Anomaly Cancellation ◽  
Neutral Fermion ◽  
The Standard Model

We propose an extension of the Standard Model of quarks and leptons to include gauge B–L symmetry with an exotic array of neutral fermion singlets for anomaly cancellation. With the addition of suitable scalars also transforming under U(1)[Formula: see text], this becomes a model of radiative seesaw neutrino mass with possible multipartite dark matter. If leptoquark fermions are added, necessarily also transforming under U(1)[Formula: see text], the diphoton excess at 750 GeV, recently observed at the Large Hadron Collider, may also be explained.

scholarly journals Dark QCD matters

2021 ◽  
Vol 2021 (12) ◽  
Author(s):  
Raghuveer Garani ◽  
Michele Redi ◽  
Andrea Tesi
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Structure Formation ◽  
Gauge Theories ◽  
Initial Temperature ◽  
Pion Mass ◽  
Dark Sector ◽  
Abelian Gauge ◽  
The Standard Model

Abstract We investigate the nightmare scenario of dark sectors that are made of non-abelian gauge theories with fermions, gravitationally coupled to the Standard Model (SM). While testing these scenarios is experimentally challenging, they are strongly motivated by the accidental stability of dark baryons and pions, that explain the cosmological stability of dark matter (DM). We study the production of these sectors which are minimally populated through gravitational freeze-in, leading to a dark sector temperature much lower than the SM, or through inflaton decay, or renormalizable interactions producing warmer DM. Despite having only gravitational couplings with the SM these scenarios turn out to be rather predictive depending roughly on three parameters: the dark sector temperature, the confinement scale and the dark pion mass. In particular, when the initial temperature is comparable to the SM one these scenarios are very constrained by structure formation, ∆Neff and limits on DM self-interactions. Dark sectors with same temperature or warmer than SM are typically excluded.

scholarly journals UTILITY OF A SPECIAL SECOND SCALAR DOUBLET

2008 ◽  
Vol 23 (09) ◽  
pp. 647-652 ◽  
Author(s):  
ERNEST MA
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Neutrino Mass ◽  
Vacuum Expectation ◽  
Vacuum Expectation Value ◽  
Grand Unification ◽  
Particle Interactions ◽  
Expectation Value ◽  
The Standard Model

This review deals with the recent resurgence of interest in adding a second scalar doublet (η+, η0) to the Standard Model of particle interactions. In most studies, it is taken for granted that η0 should have a nonzero vacuum expectation value, even if it may be very small. What if there is an exactly conserved symmetry which ensures 〈η0 〉 = 0? The phenomenological ramifications of this idea include dark matter, radiative neutrino mass, leptogenesis, and grand unification.

scholarly journals SU(2)N model of vector dark matter with a leptonic connection

2015 ◽  
Vol 30 (03) ◽  
pp. 1550018 ◽  
Author(s):  
Sean Fraser ◽  
Ernest Ma ◽  
Mohammadreza Zakeri
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Cross Section ◽  
Neutrino Mass ◽  
Thermal Equilibrium ◽  
Seesaw Mechanism ◽  
The Standard Model ◽  
Relic Abundance ◽  
New Particles

Models of fermion and scalar dark matter abound. Here we consider instead vector dark matter, from an SU(2)N extension of the standard model. It has a number of interesting properties, including a possible implementation of the inverse seesaw mechanism for neutrino mass. The annihilation of dark matter for calculating its relic abundance in this model is not dominated by its cross-section to standard-model particles, but rather to other new particles which are in thermal equilibrium with those of the standard model.

scholarly journals SINGLET FERMION DARK MATTER AND ELECTROWEAK BARYOGENESIS WITH RADIATIVE NEUTRINO MASS

2008 ◽  
Vol 23 (12) ◽  
pp. 1813-1819 ◽  
Author(s):  
K. S. BABU ◽  
ERNEST MA
Keyword(s):  
Dark Matter ◽  
Scalar Field ◽  
Standard Model ◽  
Neutrino Mass ◽  
The Other ◽  
Higgs Potential ◽  
Neutral Component ◽  
The Standard Model ◽  
Realistic Possibility ◽  
The Universe

The model of radiative neutrino mass with dark matter proposed by one of us is extended to include a real singlet scalar field. There are then two important new consequences. One is the realistic possibility of having the lightest neutral singlet fermion (instead of the lightest neutral component of the dark scalar doublet) as the dark matter of the universe. The other is a modification of the effective Higgs potential of the Standard Model, consistent with electroweak baryogenesis.

scholarly journals ELECTRON ELECTRIC DIPOLE MOMENT EXPERIMENT WITH SLOW ATOMS

2007 ◽  
Vol 16 (12b) ◽  
pp. 2337-2342 ◽  
Author(s):  
HARVEY GOULD
Keyword(s):  
Dark Matter ◽  
Dipole Moment ◽  
Standard Model ◽  
Neutrino Mass ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Atomic Clock ◽  
New Physics ◽  
The Standard Model ◽  
Electron Electric Dipole Moment

Discovering an electron electric dipole moment (e-EDM) would uncover new physics requiring an extension of the Standard Model. e-EDMs, large enough to be discovered by new experiments are now common predictions in extensions of the Standard Model, including extensions that describe baryogenesis, dark matter, and neutrino mass. A cesium slow-atom e-EDM experiment (which is similar to an atomic clock) can improve the sensitivity to the e-EDM. And, as with an atomic clock, it could be more sensitive in microgravity than on Earth. As a first step an Earth-based demonstration Cs fountain e-EDM experiment has been carried out at LBNL.

scholarly journals Neutrino Mass and the Higgs Portal Dark Matter in the ESSFSM

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Najimuddin Khan
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Neutrino Mass ◽  
Parameter Space ◽  
Direct Search ◽  
Type I ◽  
Seesaw Mechanism ◽  
The Standard Model ◽  
Relic Density ◽  
Higgs Portal

We extend the standard model with three right-handed singlet neutrinos and a real singlet scalar. We impose two Z2 and Z2′ symmetries. We explain the tiny neutrino mass-squared differences with two Z2- and Z2′-even right-handed neutrinos using type I seesaw mechanism. The Z2-odd fermion and the Z2′-odd scalar can both serve as viable dark matter candidates. We identify new regions in the parameter space which are consistent with relic density of the dark matter from recent direct search experiments LUX-2016 and XENON1T-2017 and LHC data.

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