scholarly journals Interactions of astrophysical neutrinos with dark matter: a model building perspective

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Sujata Pandey ◽  
Siddhartha Karmakar ◽  
Subhendu Rakshit
Keyword(s):  
Dark Matter ◽  
Model Building ◽  
Astrophysical Neutrinos

scholarly journals Erratum to: Interactions of astrophysical neutrinos with dark matter: a model building perspective

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Sujata Pandey ◽  
Siddhartha Karmakar ◽  
Subhendu Rakshit
Keyword(s):  
Dark Matter ◽  
Model Building ◽  
Astrophysical Neutrinos

scholarly journals Kinetic mixing, dark photons and extra dimensions. Part III. Brane localized dark matter

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Thomas G. Rizzo ◽  
George N. Wojcik
Keyword(s):  
Dark Matter ◽  
Extra Dimensions ◽  
Model Building ◽  
New Physics ◽  
Model Complexity ◽  
Complex Scalar ◽  
Dark Photon ◽  
Complex Models ◽  
The Cost ◽  
D Model

Abstract Extra dimensions have proven to be a very useful tool in constructing new physics models. In earlier work, we began investigating toy models for the 5-D analog of the kinetic mixing/vector portal scenario where the interactions of dark matter, taken to be, e.g., a complex scalar, with the brane-localized fields of the Standard Model (SM) are mediated by a massive U(1)D dark photon living in the bulk. These models were shown to have many novel features differentiating them from their 4-D analogs and which, in several cases, avoided some well-known 4-D model building constraints. However, these gains were obtained at the cost of the introduction of a fair amount of model complexity, e.g., dark matter Kaluza-Klein excitations. In the present paper, we consider an alternative setup wherein the dark matter and the dark Higgs, responsible for U(1)D breaking, are both localized to the ‘dark’ brane at the opposite end of the 5-D interval from where the SM fields are located with only the dark photon now being a 5-D field. The phenomenology of such a setup is explored for both flat and warped extra dimensions and compared to the previous more complex models.

scholarly journals 130 GeV gamma-ray line and generic dark matter model building constraints from continuum gamma rays, radio, and antiproton data

2013 ◽  
Vol 87 (10) ◽  
Author(s):  
Masaki Asano ◽  
Torsten Bringmann ◽  
Günter Sigl ◽  
Martin Vollmann
Keyword(s):  
Dark Matter ◽  
Gamma Rays ◽  
Model Building ◽  
Gamma Ray ◽  
Matter Model ◽  
Dark Matter Model

scholarly journals Dark matter from Starobinsky supergravity

2017 ◽  
Vol 32 (15) ◽  
pp. 1740002 ◽  
Author(s):  
Andrea Addazi ◽  
Maxim Yu. Khlopov
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Model Building ◽  
The Other ◽  
Unified Theory ◽  
Grand Unified Theory ◽  
Slow Roll ◽  
Dark Matters ◽  
Brane Models ◽  
The Right

We review our recent results on dark matter from Starobinsky supergravity. In this context, a natural candidate for cold dark matter is the gravitino. On the other hand, assuming the supersymmetry broken at scales much higher than the electroweak scale, gravitinos are superheavy particles. In this case, they may be non-thermally produced during inflation, in turn originated by the scalaron field with Starobinsky’s potential. Assuming gravitinos as Lightest Supersymmetric Particles (LSSP), the non-thermal production naturally accounts for the right amount of cold dark matter. Metastability of the gravitino LSSP leads to observable effects of their decay, putting constraints on the corresponding Unstable or Decaying Dark Matters scenarios. In this model, the gravitino mass is controlled by the inflaton field and it runs with it. This implies that a continuous spectrum of superheavy gravitinos is produced during the slow-roll epoch. Implications in phenomenology, model building in Grand Unified Theory (GUT) scenarios, intersecting D-brane models and instantons in string theories are discussed.

scholarly journals Exploring Neutrino-Dark Matter Interaction via Astrophysical Neutrinos at IceCube

2020 ◽  
Author(s):  
Sujata Pandey ◽  
◽  
Siddhartha Karmakar ◽  
Subhendu Rakshit
Keyword(s):  
Dark Matter ◽  
Matter Interaction ◽  
Astrophysical Neutrinos

scholarly journals Bulk Viscous Cosmology: Unified Dark Matter

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Xu Dou ◽  
Xin-He Meng
Keyword(s):  
Dark Matter ◽  
Bulk Viscosity ◽  
Hubble Parameter ◽  
Model Building ◽  
Viscosity Coefficient ◽  
Model Parameters ◽  
Viscous Cosmology ◽  
Viscosity Models ◽  
Concrete Form ◽  
Fitting Method

The bulk viscosity is introduced to model the current observational cosmos and the unified dark matter (dark matter and dark energy). The viscous unified model assumes that the universe is filled with a single nonperfect fluid with a bulk viscosity. We review the general framework for the viscous cosmology model building finding that the Hubble parameter has possessed a direct connection with the bulk viscosity coefficient. For the concrete form of the bulk viscosity, the Hubble parameter which has the scaling relation with the redshift can be obtained generally. We discuss two viscosity models and the cosmological evolution to which they lead in detail. Using SNe Ia data, CMB shift, as well as BAO observations, the viscosity model parameters can be fitted very well. We also briefly review the fitting method in this paper.

scholarly journals Astronomy with energy dependent flavour ratios of extragalactic neutrinos

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
Siddhartha Karmakar ◽  
Sujata Pandey ◽  
Subhendu Rakshit
Keyword(s):  
Dark Matter ◽  
Energy Dependence ◽  
High Energy ◽  
Neutrino Energy ◽  
Density Profiles ◽  
Neutrino Telescopes ◽  
Astrophysical Neutrinos ◽  
Astrophysical Objects ◽  
Energy Dependent

Abstract High energy astrophysical neutrinos interacting with ultralight dark matter (DM) can undergo flavour oscillations that induce an energy dependence in the flavour ratios. Such a dependence on the neutrino energy will reflect in the track to shower ratio in neutrino telescopes like IceCube or KM3NeT. This opens up a possibility to study DM density profiles of astrophysical objects like AGN, GRB etc., which are the suspected sources of such neutrinos.

scholarly journals The dawn of FIMP Dark Matter: A review of models and constraints

2017 ◽  
Vol 32 (27) ◽  
pp. 1730023 ◽  
Author(s):  
Nicolás Bernal ◽  
Matti Heikinheimo ◽  
Tommi Tenkanen ◽  
Kimmo Tuominen ◽  
Ville Vaskonen
Keyword(s):  
Dark Matter ◽  
Early Universe ◽  
Thermal Equilibrium ◽  
Model Building ◽  
Massive Particles ◽  
Visible Sector ◽  
Freeze Out

We present an overview of scenarios where the observed Dark Matter (DM) abundance consists of Feebly Interacting Massive Particles (FIMPs), produced nonthermally by the so-called freeze-in mechanism. In contrast to the usual freeze-out scenario, frozen-in FIMP DM interacts very weakly with the particles in the visible sector and never attained thermal equilibrium with the baryon–photon fluid in the early Universe. Instead of being determined by its annihilation strength, the DM abundance depends on the decay and annihilation strengths of particles in equilibrium with the baryon–photon fluid, as well as couplings in the DM sector. This makes frozen-in DM very difficult but not impossible to test. In this review, we present the freeze-in mechanism and its variations considered in the literature (dark freeze-out and reannihilation), compare them to the standard DM freeze-out scenario, discuss several aspects of model building, and pay particular attention to observational properties and general testability of such feebly interacting DM.

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